WO2001015965A2 - Bicyclette a suspension integrale se chevauchant en position allongee - Google Patents

Bicyclette a suspension integrale se chevauchant en position allongee Download PDF

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Publication number
WO2001015965A2
WO2001015965A2 PCT/US2000/023816 US0023816W WO0115965A2 WO 2001015965 A2 WO2001015965 A2 WO 2001015965A2 US 0023816 W US0023816 W US 0023816W WO 0115965 A2 WO0115965 A2 WO 0115965A2
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WO
WIPO (PCT)
Prior art keywords
bicycle
stem
frame
seat
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2000/023816
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English (en)
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WO2001015965A3 (fr
Inventor
Christopher W. Blake
Christopher P. Dodman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cannondale Corp
Original Assignee
Cannondale Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cannondale Corp filed Critical Cannondale Corp
Publication of WO2001015965A2 publication Critical patent/WO2001015965A2/fr
Publication of WO2001015965A3 publication Critical patent/WO2001015965A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K3/00—Bicycles
    • B62K3/005—Recumbent-type bicycles

Definitions

  • This invention relates generally to bicycles. More particularly, this invention relates to recumbent bicycles. Still more particularly, this invention relates to a full- suspension recumbent bicycle.
  • Bicycles are typically designed having a frame connecting two wheels.
  • the rider sits on a seat attached to the frame above the wheels such that their legs extend downwardly and are positioned adjacent and in front of the rear wheel to rotate pedals connected to crank arms, which turn a front sprocket adjacent the crank arms.
  • the pedals are typically located substantially vertically downward from the seat.
  • the front sprocket is connected to the rear wheel by a chain and rear sprocket, such that the rotation of the pedals causes the rotation of the rear wheel, thus powering the vehicle forward.
  • the front wheel is rotatably connected to a front fork that is connected to a set of handle bars that permits the rider to steer the bicycle.
  • Another type of bicycle design is a recumbent design where the rider sits in a seat having a back with their legs extending forward.
  • the rear wheel is located behind the seat and the front wheel in front of the seat. This positioning allows the rider to be seated closer to the ground.
  • the pedals are in front of the rider, but function in a similar manner to that of a regular bicycle to power the vehicle forward.
  • the handle bars are usually located in front of the rider either above or below the rider's legs.
  • a recumbent bicycle allows the rider to power the vehicle more efficiently as the rider is able to brace themselves against the seat back.
  • the recumbent design reduces wind resistance, provides greater comfort as the rider can rest their back against the seat, and increases safety as the rider is looking ahead rather than at the ground, and because their feet are first, it is less likely the rider will be involved in a head-on collision.
  • Recumbent bicycles typically have been designed with either a short wheel base or a long wheel base. A short wheel base is more likely to result in a more maneuverable bicycle and one that is more aerodynamic. Further, the shorter wheel base bicycle will be easier to store. A long wheel base is more likely to result in a bicycle capable of fitting taller riders and cruising more efficiently.
  • the seat of a recumbent bicycle is made to accomplish a few objectives beyond the conventional bicycle seat's objective of supporting the rider. First, the seat supports the back of the rider. Second and more importantly, the seat back counteracts the force of the rider's feet on the pedals of the bicycle allowing the rider to power the vehicle more efficiently.
  • a recumbent bicycle is described in U.S. Patent No. 5,607,171 to Labranche.
  • This recumbent bicycle features a longitudinal main tube with a front section telescopically inserted into a rear section to form an adjustable length for the bicycle.
  • a front and rear wheel are rotatably mounted off of the main frame.
  • a pedal assembly is mounted on the main tube front section, while a seat and handle assembly are mounted on the main tube rear section.
  • the handle bar assembly is connected to the front wheel by at least a linkage rod.
  • the driving mechanism includes a pair of chain and sprocket assemblies which are connected in series through a common intermediate sprocket axis.
  • Suspension systems for recumbent bicycles are typically more complex than on conventional bicycle frames.
  • the seat of the bicycle is sprung.
  • U.S. Patent No. 670,734 to Jarvis uses a tube parallel to the seat post with wheel stays connecting at the top of this tube.
  • U.S. Patent No. 4,456,277 to Carpenter discloses a tricycle having single trailing rear wheel mounted in an independent swing-arm type suspension.
  • the tricycle includes a rear swing arm assembly with a pair of mains extending from swing arm pivots to the rear wheel axil.
  • a shock absorber is mounted between an upper swing arm main transverse tube and the shock bracket mount which in turn is mounted on the back of the seat main.
  • U.S. Patent No. 5,553,881 to Klassen et al. discloses a rear suspension system for a bicycle.
  • the suspension is shown and described for use on a conventional bicycle having a vertical seat tube.
  • the suspension system comprises interconnected assemblies including a lower pivot assembly, an upper pivot assembly and a rear swinging arm assembly.
  • a shock absorber is located in a vertical position adjacent the seat tube between the upper pivot assembly and a bracket attached to the seat tube.
  • the swinging arm assembly is caused to move up and down as the bike rides over terrain, this causes the upper pivot assembly to move up and down which compresses and unloads the shock absorber, and the lower pivot assembly pivots about the bottom bracket.
  • the present invention is directed to a recumbent bicycle.
  • the bicycle includes a frame member with first and second ends and a head member rigidly attached to the frame member towards the first end.
  • a front wheel is rotatably coupled to the head member.
  • the bicycle further includes a first member and a second member.
  • the first member is connected to the frame member towards the second end and a second member is pivotally connected to the first member with a rear wheel rotatably coupled to the second member.
  • the frame member can be a down tube and the head member can be a head tube.
  • the first member may include first and second pivot supports on opposite sides of a central plane of the frame member.
  • a chain extends between the first and second pivot supports spaced from the plane.
  • a rear suspension system can be provided between the frame member and the second member and the rear suspension system may include a shock absorber.
  • the second member comprises a swing arm assembly and the shock absorber extends from the first member rearward and upward to the swing arm assembly.
  • a front fork can be coupled to the head member for supporting the front wheel and a front suspension system may be provided between the front fork and the head member.
  • connection between the first member and the second member defines a pivot point and the pivot point is located between the front and the back wheels. In another embodiment, the pivot point is located within the perimeter of the back wheel.
  • the present invention is also related to an adjustable steering stem for a bicycle that includes a stem base, a steerer member (configured to steer the bicycle), and stem top.
  • the stem base is located at a first end of the steerer member and the stem top is pivotally attached to the stem base and pivotable between first and second stop positions.
  • the first stop position prevents the stem top from traveling in a first direction and the second stop position prevents the stem top traveling in a second, opposite direction. Both the first and second stop positions can be adjustable.
  • the present invention is also directed to a quick release assembly for clamping a clamped part.
  • the quick release assembly includes a cam mechanism including a bite point, a shaft extending through the cam mechanism, an end piece fixedly attached to one end of the shaft, and a clamping adjustment mechanism located between the cam mechanism and the clamped part.
  • the clamping adjustment is movable along the shaft so that it adjusts the bite point of the cam mechanism.
  • the quick release assembly can be used to movably connect a seat to a bicycle frame. According to one feature of the quick release assembly, the cam mechanism and clamping adjustment mechanism are located on the same side of the bicycle.
  • the present invention is directed to a bicycle with a mounting component system.
  • the bicycle includes a frame having a front wheel and a rear wheel rotatably coupled thereto, a steering mechanism coupled to the frame, a seat mounted on the frame, a chain for transferring power from a rider to the rear wheel, a mount face is defined on the frame, and a mounted component is releasably secured to the mount face.
  • the mount face is preferably substantially perpendicular to a horizontal plane. This system is particularly useful for recumbent bicycles.
  • the frame can further include a main frame member and a head tube coupled thereto and the mount face disposed in front of the head tube.
  • a front member extends from the head tube and includes the mount face disposed on the free end thereof.
  • the front member can be one or more pieces.
  • the mounted component is at least one of the following: a chain-and-sprocket guard, at least one body panel, at least one fairing, at least one nose cone, at least one light, or a combination thereof.
  • FIG. 1 is a perspective view of an embodiment of a recumbent bicycle of the present invention
  • FIG. 2 is a left-side view of the bicycle of FIG. 1 ;
  • FIG. 3 is a right-side view of the bicycle of FIG. 1;
  • FIG. 4 is a top view of the bicycle of FIG. 1;
  • FIG. 5 is a bottom view of the bicycle of FIG. 1;
  • FIG. 6 is a front view of the bicycle of FIG. 1;
  • FIG. 7 is a rear view of the bicycle of FIG. 1;
  • FIGS. 8A-B are front and side views, respectively, of an embodiment of a flexible coupling of handle bars to a frame for use with the bicycle of FIG. 1 ;
  • FIG. 9A is a cross-sectional view of a second embodiment of the flexible coupling of the handle bars to the frame for use with the bicycle of FIG. 1 ;
  • FIG. 9B is an exploded view of the flexible coupling of FIG. 9A;
  • FIG. 9C is a perspective view of the flexible coupling of FIG. 9A in an assembled state
  • FIGS. 10A-D are side views of a third embodiment of the flexible coupling of the handle bars to the frame for use with the bicycle of FIG. 1;
  • FIG. 10E is an enlarged, cross-sectional view of an adjustable bolt that may be used in the flexible coupling of FIG. 10D;
  • FIG. 11A is a perspective view of a quick release assembly of the present invention for use with the bicycle of FIG. 1 ;
  • FIG. 1 IB is an end view of the quick release assembly of FIG. 11 A;
  • FIG. 11C is an exploded view of the quick release assembly of FIG. 11A;
  • FIG. 1 ID is a perspective view of an alternative embodiment of a track for use with the quick release assembly of FIG. 11A;
  • FIG. 1 IE is an end view of a prior art quick release assembly
  • FIG. 12 is a side view of another embodiment of the recumbent bicycle of the present invention
  • FIG. 13 is a side view of the flexible coupling on the recumbent bicycle of FIG. 12;
  • FIG. 14 is a partial, perspective view of another embodiment of the recumbent bicycle of the present invention
  • FIG. 15 is a partial, perspective view of a bicycle frame including a mounting system of the present invention, wherein front sprockets and a mountable component are detached therefrom and not shown;
  • FIG. 16 is a partial, side view of the bicycle frame shown in FIG. 15;
  • FIG. 17 is a partial, left side view of the bicycle frame of FIG. 15, wherein the front sprockets and mountable component are shown attached thereto;
  • FIG. 18 is a partial, right side view of the bicycle frame of FIG. 17.
  • FIGS. 1-4 a perspective view of a recumbent bicycle 20 according to the present invention is shown.
  • the bicycle 20 includes front and rear wheels
  • a frame 26 is connected to the front and rear wheels 22 and 24 and is symmetrical with respect to a central plane 5.
  • a seat 28 is movably attached to the frame 26.
  • a front derailleur 30, front sprockets 32, and crank arms 34 with attached pedals 36 are connected to the frame 26 at end 38 closest to the front wheel 22.
  • a chain 40 runs from the front sprockets 32 to a rear sprocket cluster 42 attached to a hub 44 of the rear wheel 24.
  • the seat 28 includes a back 46 and the pedals 36 are located such that when the rider is seated in the seat 28 their legs reach generally, horizontally across to the pedals 36 for rotating the pedals 36 and causing the rear wheel 24 to turn to produce forward movement.
  • a first end 48 of a main frame member or down tube 50 of the main frame 26, where the front wheel 22 is rotatably mounted is attached to a bottom bracket shell 52.
  • a head tube 54 is provided.
  • a front fork 56 for rotatably mounting the front wheel 22 is provided below the head tube 54.
  • a front suspension system 58 is provided.
  • the front suspension system 58 is located at least between the head tube 54 and the front fork 56.
  • the front suspension system 58 includes a HeadShockTM suspension with needle bearings.
  • HeadShockTM suspension with needle bearings examples of front suspension systems useful with the present invention are disclosed in U.S. Patent No. 5,924,714 issued July 20, 1999 to Farris et al., entitled “Bicycle Suspension System", U.S. Patent No. 5,702,092 issued December 30, 1997 to Farris et al., entitled "Suspension
  • a handle bar extension tube 60 is provided above the head tube 54, and a handle bar stem 62 slides telescopically in the extension tube 60.
  • a handle-bar-stem-extension tube 64 slides telescopically in the stem 62 to provide a steering mechanism 66 for the rider.
  • the tube 64 includes handle bars 68 for the rider to grasp to assist in steering the vehicle.
  • a movable attachment 70 is provided between the handle bar assembly 72 and the head tube 54.
  • this movable attachment 70 is a flexible coupling that allows at least the handle bar assembly 72 to be brought toward or away from the rider as shown by arrow A in FIG. 2. Most preferably, the flexible coupling 70 allows the handle bar assembly 72 to be set at a desired angle so that the rider can comfortably steer the bicycle 20.
  • a front derailleur mast 76 is provided on a second end 78 of the bottom bracket shell 52.
  • the front derailleur 30, front sprockets 32, and crank arms 34 having pedals 36 are attached adjacent to the front derailleur mast 76 for driving the vehicle.
  • the chain 40 connects the front sprockets 32 to a rear sprocket cluster 42.
  • the rear sprocket cluster 42 and the rear derailleur (not shown) are located adjacent to the hub 44 of the rear wheel 24.
  • a roller 82 (as best seen in FIG. 3) is located just behind the head tube 54 and on the underside of the down tube 50.
  • the chain 40 passes over the roller 82 to the rear sprocket cluster 42.
  • the roller 82 provided adjacent the head tube 54 allows a front sprocket 32 change to not effect the gears. More than one roller 82 can be provided for directing the chain 40.
  • the chain 40 is located on the right side of the bicycle 20. Because the front wheel 22 is located between the bottom bracket shell 52 and the rear wheel 24, the bicycle 20 can have a shorter wheel base L, (as shown in FIG. 1), which makes for a shorter turning radius and improved handling.
  • wheel base L is about 41 inches long.
  • the seat 28 is movably attached to the down tube 50 between the front and rear wheels 22 and 24.
  • the seat 28 is located immediately adjacent the rear wheel 24.
  • the seat 28 is connected in such a manner that it is adjustable to different positions along a partial length 84 of the down tube 50.
  • a quick release lever 86 is provided for translational adjustment of the seat 28 along the partial length 84 of the down tube 50.
  • the seat 28 itself is preferably constructed with a tubular structure and has a bottom 88 that preferably receives a foam cushion (not shown).
  • the seat back 46 is preferably made of a fabric or mesh material.
  • the seat back 46 includes two surfaces 90 and 92.
  • the second surface 92 opposes the first surface 90, which the rider leans against, and can have pockets to accommodate items such as water bottles, or storage of other items such as wallets or keys.
  • a rear suspension system 116 is provided at the second end 94 of the down tube 50 .
  • a torque tube collar 96 connects the down tube 50 to pivot supports 98, 100 on each end of the torque tube collar 96.
  • the pivot supports 98 and 100 connect the torque tube collar 96 to a swing arm assembly 102.
  • the swing arm assembly 102 is triangular, as shown, with two triangular portions 104 and 106 connected by cross member 105 above the rear wheel 24.
  • the swing arm assembly 102 can have a number of different shapes such as an L-shape.
  • the swing arm assembly 102 rotatably supports the rear wheel 24.
  • the bicycle 20 has a mid-pivot point 108 (best seen in FIG.
  • Mid-pivot point 108 locates a pivot axis and provides pivot points 110, 112 approximately mid-way along the length L (in FIG. 3) of the pivot supports 98, 100 and chain stays 134, 136.
  • the length of the supports 98, 100 is approximately equal to the length of the stays 134, 136.
  • the location of the pivot 108 can be varied to change the lengths of supports 98, 100 and stays 134, 136.
  • pivot support members 98, 100 extend approximately one half the length of chain stays 134, 136.
  • the mid-pivot point 108 is located outboard of the chain (as best seen in FIG. 4).
  • the pivot points 110 and 112 are located at the connection between each pivot support 98 and 100 and the swing arm assembly 102.
  • Mid-pivot point 108 locates a pivot axis and provides pivot points 110, 112 approximately mid-way along the length L (in FIG. 3) of the pivot supports 98, 100 and chain stays 134, 136.
  • a shock absorber 118 is connected to the torque tube collar 96 (as shown in FIGS. 4-7) and a shock mount point 120 (as shown in FIG. 4) on the swing arm assembly 102.
  • Shock mount point 120 is connected to cross member 125 of swing arm assembly
  • shock absorber 118 extends substantially vertically upward and rearward from torque tube collar 96 to shock mount point 120.
  • a torque tube liner 122 (as shown in FIG. 4) is inside the torque tube collar 96 and the pivot supports 98 and 100 connect to the torque tube collar 96 via castleations 124.
  • the castleations 124 comprise multiple square cuts 126 across the ends 128 and 130 of the torque tube collar 96 to provide a castleated interface for transmitting torque between the torque tube collar 96 and the pivot supports 98 and 100.
  • the position of pivot supports with respect to down tube can be changed to test and develop different wheel bases without altering the swing arm assembly 102 geometry.
  • Pivot supports 98, 100 are preferably fixedly connected to down tube 50 once a suitable wheel base is achieved.
  • the chain 40 is located inside the pivot points 110 and 112. Further, chain 40 is generally parallel with central plane 5 and is close to parallel with chain stays 134 and 136.
  • the chain stays 134 and 136 preferably descend from the pivot points 110, 112 to the rear wheel hub 44. Preferably, the chain stays 134 and 136 descend at an angle ⁇ of about ten degrees with respect to the horizontal H.
  • the pivot supports 98 and 100 are adjusted to locate the pivot points 110 and 112 at the optimal location relative to the chain 40 in order to decrease pedaling induced suspension activation.
  • two seat supports 138 and 140 connect both pivot points 110 and 112 to the seat back 46.
  • the seat supports 138 and 140 have an adjustable length.
  • the length of the seat supports 138 and 140 are adjustable by setting two telescopic tubes of each seat support 138 and 140 to the desired position relative to each other and locking them in that desired position to achieve the desired length.
  • the bicycle 20 includes a rear rack 146.
  • the rear rack 146 is connected to the back 46 of the seat 28 and at each pivot point 110 and 112.
  • the rack 146 may hold items for the rider including luggage.
  • This embodiment of the recumbent bicycle 20 preferably has a substantially "50/50 weight distribution", which means the same weight is exerted on the front wheel 22 as on the rear wheel 24, when a rider is seated on the bicycle.
  • FIGS. 8A-B an embodiment of the movable attachment or flexible coupling 70 between a stem 148 and a steerer tube 150 is shown.
  • the flexible coupling 70 allows the rider to pull the handle bar assembly 72 (as best seen in FIGS. 2 and 3) toward and away from themselves, shown by arrow A in FIG. 2, and to fix the handle bar assembly 72 at a desired angle with respect to horizontal for comfortable and safe riding.
  • the stem 148 includes a stem base 152, a stem top 154 and the handle bar extension tube 60.
  • the handle bar extension tube 60 is attached to the stem top 154 which is pivotally bolted to the stem base 152.
  • the stem 148 is clamped to the steerer tube 150. Referring to FIG.
  • a bar 156 connects the stem top 154 to the stem base 152 which is connected to the steerer tube 150.
  • the steerer tube 150 is part of the fork 56 (as shown in FIG. 1) and rotates on bearings in the head tube 54.
  • a threaded knob nut 160 is provided for adjusting the length of the bar 156 between the stem top 154 and the steerer tube 150 to place the handle bar assembly 72 at the desired angle.
  • the nut 160 is screwed to the desired position to set the final location of the handle bar assembly 72.
  • a lever 162 can also be provided for "shock lockout" of the front suspension system 58 in the head tube 54. In this way, the front suspension system 58 may be selectively deactivated by the rider as desired, such as when riding uphill.
  • FIGS. 9A-9C another embodiment of the attachment between the handle bar extension tube 60 and the steerer tube 150 is shown.
  • a pivotal connection 158 between the stem top 154 and the stem base 152 is also provided to allow the backward and forward movement in the direction of arrow A of the handle bar assembly 72 (shown in FIG. 1) relative to the down tube 50.
  • the handle bar extension tube 60 is attached to the stem top 154, and the stem base 152 is clamped to the steerer tube 150 with a pinch bolt 164.
  • the steerer tube 150 is located within the head tube 54 with head set bearings 166 and head set cups 168. As shown in FIGS.
  • an adjuster bolt 170 connects the stem top 154 and the stem base 152.
  • a first barrel nut 172 is provided on the stem top 154 in round slots 174 and a second barrel nut 176 is provided on the stem base 152 in elongated slots 178.
  • the rider screws the adjuster bolt 170 to set the final location of the handle bar assembly 72 (shown in FIG. 1).
  • a lever 162 (as shown in FIG. 9A) can be provided for shock lockout of the front suspension system 58 in the head tube 54. Either of these embodiments may be covered with a boot.
  • the boot is a protective covering over coupling 70 formed of a material such as rubber or plastic. Other materials suitable for protecting coupling 70 from the elements and shielding coupling 70 from interferences may also be used.
  • FIGS. 10A-D yet another embodiment of the attachment between the handle bar extension tube 60 and the down tube 50 (seen in FIG. 1) is shown.
  • the stem top 154 is pivotally attached to the stem base 152.
  • First and second bolts 182 and 184 are provided for adjusting the position of the stem top 154 relative to the stem base 152.
  • a third bolt 186 is shown.
  • the third bolt 186 is a shoulder bolt having a belleville or spring washer, a steel washer and a plastic top hat bushing.
  • a ball detent system 188 is used along with the bolts 182, 184 and 186 to set the handle bar assembly 72 (shown in FIG. 1) at the desired angle.
  • a pin 190 could be used instead of the second bolt 184, if a fixed stop is desired.
  • an adjustable bolt 192 can be provided having a barrel nut 194 and a washer 196.
  • the adjustable bolt 192 provides adjustment of the handle bar assembly 72 (FIG. 1) to the desired position.
  • a dial 198 may also be provided for a shock lockout of the front suspension system 58 (as shown in FIG. 1) in the head tube 54.
  • FIG. 11 A shows a quick release assembly 199 for the seat 28 (seen in FIG. 1) which allows the seat 28 to be adjusted longitudinally along the down tube 50 of the frame 26.
  • the seat 28 is slidably connected to the down tube 50.
  • the seat 28 is connected in such a manner that it is adjustable to different positions along a partial length 84 of the down tube 50.
  • the assembly 199 is a cam side adjustable (CSA) quick release assembly that allows the seat 28 to be locked into a plurality of positions along a track 206 on the selected partial length 84 of the down tube 50.
  • CSA cam side adjustable
  • At least one lower seat mount 226 and preferably two mounts 226 are provided on the seat 28 attached to a cross bar 201 on the seat bottom 88 (as shown in FIG. 1).
  • the seat 28 slides freely along the length of the track 206.
  • a partial portion 84 of the down tube 50 is available for selection to position the seat 28.
  • the rider can then activate the quick release levers 86, to lock the seat 28 into the desired position. As shown in FIG.
  • the quick release assembly 199 comprises a cam mechanism or portion 208 on the lever 86, a shaft 210 having a length 214, an end piece 212, a first clamped part or the seat mount 226, and a second clamped part or the mount 226.
  • An adjustment of a bite point 218 of the cam mechanism 208 is located on the CSA quick release assembly 199 between the cam mechanism 208 and the first part being clamped or the seat mount 226.
  • the end piece 212 is attached to the shaft 210 by threads and secured with a thread-locking compound.
  • An inner adjuster barrel 224 slides over the shaft 210 and locates in the lower seat mount 226.
  • a dowel pin 228 ensures that the inner adjuster barrel 224 cannot rotate relative to the lower seat mount 226.
  • An outer adjuster barrel 230 is attached to the inner adjuster barrel 224 by fine pitch threads.
  • a recessed washer 232 slides over the shaft 210 and rests against the outer adjuster barrel 230.
  • a cam washer 234 fits into the recess in the recessed washer 232.
  • Lever 86 is assembled over a pivot 238 and the shaft 210 is fitted through a hole in pivot 238 and a slot 240 in the lever 86. The shaft 210 is threaded into the pivot 238 and secured with a permanent thread-locking compound.
  • Track 206 defines a slot 207 configured for slidably retaining end piece 212 therein.
  • cam washer 234 is pushed by cam mechanism 208 on the lever 86 which causes the shaft 210 and end piece 212 to be pulled through and toward, respectively, the lower seat mount 226 thus clamping the track 206 to the lower seat mount 226.
  • the bite point 218 of the cam mechanism 208 can be adjusted.
  • the CSA quick release assembly 199 can be used anywhere a quick release is desired, not just for adjusting the position of the seat 28.
  • Track 400 is similar to track 206 and performs essentially the same function as track 206, as shown in
  • Track 400 is preferably riveted to down tube 50 (as shown in FIGS. 2 and 3) through holes 402, however, other means of attachment to down tube 50 may be used. Also, holes 402 are spaced wider apart for more secure attachment to the down tube 50.
  • Track 400 defines a slot 404 configured for slidably retaining end piece 212 therein, as shown in FIG. 1 IB. Using this alternative, slot 404 is substantially straight and does not include notches so that the end piece 212 moves smoothly within slot 404.
  • a shaft 502 is provided at one end with an end piece 504 threadably connected thereto and a cam mechanism 506 at the opposite end.
  • Cam mechanism 506 has a bite point 508 which can be adjusted by rotating end piece 504 relative to shaft 502.
  • Shaft 502 extends through the bicycle frame and the member to be clamped (not shown), cam mechanism 506, member 510 is on one side of the frame and the end piece 504 is on the other side.
  • shaft 502 has a length 514.
  • length 214 of shaft 210 of the present invention is preferably shorter than length 514 of shaft 502.
  • the present invention is assembled and only accessible on one side of the bicycle.
  • shaft 210 is not required to have a length sufficient to extend through a frame member.
  • the adjustment mechanism 230 is located between the cam mechanism 208 and the first part being clamped 226. In this manner, end piece 212 is fixedly attached to the shaft and the cam mechanism 208 can be used and adjusted along the same side of the bicycle.
  • FIG. 12 shows another embodiment of the recumbent bicycle 1244 of the present invention.
  • a first end 1246 of a down tube 1248 is attached to a head tube 1250.
  • a front fork 1252 for rotatably mounting a front wheel 1254 is provided below the head tube 1250.
  • a front suspension system 1256 is provided below the head tube 1250.
  • the front suspension system 1256 is located in the head tube 1250 and extends downwardly to the front fork 1252.
  • the front suspension system 1256 includes a HeadShockTM suspension.
  • the provision of a front suspension system 1256 above the front fork 1252 allows for the easy manufacture of the fork 1252 for different wheel sizes.
  • a flexible coupling 1258 is attached to a steerer tube 1260.
  • the flexible coupling 1258 can be a universal joint, a CV joint, or bellows.
  • steerer tube 1260 is located within the head tube 1250 with head set cups 1262 and headset bearings 1264.
  • a pinch bolt 1266 clamps the flexible coupling 1258 to the steerer tube 1260.
  • a bearing housing 1268 attaches a steering column 1270 to the flexible coupling 1258.
  • the flexible coupling 1258 transmits steering to the fork 1252 from the steering column 1270. As shown in FIG.
  • a handle bar tube 1272 having handle bars 1274 for steering the bicycle 1244 is provided telescopically inserted into the steering column 1270.
  • a quick release lever 1276 is preferably provided for adjusting the length of the handle bar assembly 1278 to the proper length for the rider.
  • a bottom bracket shell 1280 Extending from the down tube 1248 upward to the steering rolumn 1270 is a front derailleur mounting tube 1282.
  • the bearing housing 1268 having bearings 1283 includes a bolt 1284 having a quick release extending toward the front derailleur mounting tube 1282.
  • a second tube 1286 is bolted adjacent a first end 1288 with a quick release lever 1290 (as shown in FIG.
  • a second end 1292 of the second tube 1286 is telescopically inserted within the front derailleur mounting tube 1282 and clamps to that tube 1282 using a clamp 1294 having a bolt 1296.
  • a quick release lever may be attached to the bolt 1296 to set the second tube 1286 at the desired position with the front derailleur mounting tube 1282 to adjust the angle of the handle bar assembly 1278 as shown by arrow A with the down tube 1248 such that it will be at a comfortable position for the rider to steer the vehicle.
  • a front derailleur (not shown), front sprockets 1304, and crank arms 1306 having pedals 1308 are attached to the down tube 1248 for driving the vehicle using bottom bracket shell 1280.
  • a chain 1310 connects the front sprockets 1304 to a rear sprocket cluster 1312.
  • the rear sprocket cluster 1312 and a rear derailleur 1314 are located adjacent to a hub 1316 of a rear wheel 1318.
  • the front derailleur, front sprockets 1304, crank arms 1306, and pedals 1308 are located behind the front wheel 1254.
  • chain 1310 extends without diversion from the front sprockets 1304 to the rear sprocket cluster 1312.
  • chain 1310 is located on the right side of the bicycle 1244.
  • a seat 1320 is movably attached to the down tube 1248 between the front and rear wheels 1254 and 1318 in a similar manner to the previous embodiment.
  • the seat 1320 is located adjacent the rear wheel 1318.
  • the seat 1320 is connected in such a manner that it is adjustable to different positions along a partial length 1322 of the down tube 1248.
  • a CSA quick release lever 1324 is provided for translational adjustment of the seat 1320 along the partial length 1322 of the down tube 1248 and the seat 1320 may be adjusted to a plurality of positions.
  • the seat 1320 itself is preferably constructed with a tubular structure and has a bottom 1328 that preferably is made of a foam cushion.
  • a seat back 1330 is preferably made of a fabric or mesh material.
  • the seat back 1330 includes two surfaces 1332 and 1334.
  • the second surface 1334 opposes the first surface 1332 that the rider leans against, and can have pockets to accommodate items such as water bottles, or storage of other items such as wallets or keys.
  • a torque tube collar 1338 rotatably connects the down tube 1248 to a pivot support 1340 on each end of the torque tube collar 1338.
  • the pivot supports 1340 connect the torque tube collar 1338 to a swing arm assembly 1342.
  • the swing arm assembly 1342 is triangular, as shown and described above.
  • the swing arm assembly 1342 can be shaped as an "L”.
  • the rear wheel 1318 is rotatably mounted to the swing arm assembly 1342.
  • the bicycle 1244 has a mid-pivot point 1344 defined by pivot points 1346 located at the connection between each pivot support 1340 and the swing arm assembly 1342.
  • pivot points 1346 provide a pivot axis for a rear suspension system 1348.
  • a shock absorber 1350 is connected to the torque tube collar 1338 and a point 1352 on the swing arm 1342.
  • the chain 1310 is located inside the pivot points 1346. Further, the chain 1310 is close to parallel with chain stays 1354.
  • the torque tube collar 1338 is adjusted to locate the pivot points 1346 at the optimal point relative to the chain 1310 in order to decrease pedaling induced suspension.
  • Two seat supports 1356 connect each pivot point 1346 to the seat back 1330.
  • the seat supports 1356 have an adjustable length as shown by arrow B.
  • the length of the seat supports 1356 are adjustable by setting two telescopic tubes 1358 and
  • each seat support 1356 to the desired relation to each other and locking them in that desired position to achieve the desired length.
  • the seat supports 1356 include a quick release lever 1362 for locking and unlocking the adjustment of supports 1356.
  • a rear rack 1364 is provided on the bicycle 1244.
  • the rear rack 1364 is suspended by being connected to the seat back 1330 and each pivot point 1346.
  • Rack 1364 is further supported by vertical members 1365.
  • the rack 1364 may hold items for the rider and luggage.
  • disk brakes 1366 and 1368 may be provided on either or both front wheels 22 and 1254 and rear wheels 24 and 1318.
  • the front wheels 22 and 1254 have a twenty (20) inch diameter in the first embodiment and sixteen (16) inch diameter in the second embodiment, and the rear wheels 1318 and 24 have a diameter of twenty-six (26) inches in both embodiments.
  • the full suspension bicycle 1244 locates the front wheel 1254 slightly in front of a head tube 1250 used to attach the handle bar assembly 1278 and the front fork 1252 for rotatably mounting the front wheel 1254.
  • the front derailleur, front sprockets 1304, crank arms 1306, and pedals 1308 are located behind the front wheel 1254.
  • FIG. 14 shows a lower frame assembly 2400 of yet another embodiment of a recumbent bicycle of the present invention. This frame assembly can be incorporated into a bike similar to bikes 10 and 1244 shown in FIGS. 1 and 12.
  • a first end 2402 of a down tube 2404 is attached to a head tube 2406.
  • a steering assembly (not shown) is attached above head tube 2406. Below the head tube 2406, a front fork 2408 for rotatably mounting a front wheel 2410 is provided. As with the previous embodiments, a front suspension system 58 (as shown in FIGS.1-3) may be provided above the front fork 2408 and below the head tube 2406.
  • a front derailleur (not shown), front sprockets 2412, and crank arms 2414 are attached to the down tube 2404 for driving the vehicle using bottom bracket shell 2416. The front derailleur, front sprockets 2412, and crank arms 2414 are located behind the front wheel 2410.
  • a chain 2418 connects the front sprockets 2412 to a rear sprocket cluster 2420.
  • the rear sprocket cluster 2420 and a rear derailleur are located adjacent to a hub 2422 of a rear wheel 2424.
  • the chain 2418 extends without diversion from the front sprockets 2412 to the rear sprocket cluster 2420.
  • the chain 2418 is located on the right side of the frame 2400.
  • a seat (not shown) is movably attached to down tube 2404 in a similar manner to the previous embodiments.
  • pivot supports 2428 are connected to down tube 2404 and extend downward toward hub 2422, such as by a torque tube collar 96 (as shown in FIGS.4-7), as described above.
  • An attachment method such as welding can be used to join the pivot supports 2428 to down tube 2404, however, the present invention is not limited to such a means of attachment.
  • the pivot supports 2428 have substantially Y-shaped rear ends or yokes 2429 that connect to swing arm members 2430.
  • the rear wheel 2424 is rotatably mounted to the swing arm members 2430.
  • Pivot points 2434 are located at the connection between each pivot support 2428 and the swing arm members 2430.
  • the swing arm members 2430 are part of a triangular swing arm assembly, as shown and described above.
  • pivots 2434 is preferably located outside the perimeter P of rear wheel 2424. Pivots 2434 can be located anywhere between front and rear wheels 2410 and 2424 spaced from the down tube.
  • a shock absorber 118 as shown in FIGS.1-3, is suitably placed between down tube and the swing arm members 2430.
  • the pivot points 2434 are co-axial and separated to form a pivot axis 2433 for swing arm 2430, and the chain 2418 is located inside the pivot points 2434 and runs generally parallel to the swing arm members 2430 and normal to the axis 2433 of the pivot points.
  • the rear wheel hub 2422 or axis is preferably located below and rearward of the center or gravity of the rider.
  • a portion of a bicycle frame 3000 is shown that is for use with the bicycles 10 or 244 (in FIGS. 1 and 12) or for use with the frame 2400 shown in FIG. 14.
  • the frame 3000 includes a main frame member 3002 (partially shown), a head tube 3004, and a bottom bracket shell or front member 3006.
  • the main frame member 3002 is coupled to the rear of head tube 3004, and the front member 3006 is coupled to the front of head tube 3004.
  • the member 3006 extends substantially parallel to the ground G.
  • the free end 3008 of the front member 3006 is split and includes a pair of projections 3010 that have bores 3012 defined therein.
  • the bores 3012 receive fasteners 3013.
  • the free end 3008 of the front member may not include the projections and the function of the projections, as discussed below, may be supplied by a separate clamp.
  • the bicycle frame 3000 further includes a mounting member 3014 that is slidably movable with respect to the front member 3006, as indicated by arrow C.
  • the mounting member can be integrally formed with the member 3006 as shown in the frame of FIG. 1.
  • the mounting member 3014 includes a front derailleur mast 3016 for supporting a front derailleur (not shown) thereon and a bore 3018 for rotatably mounting front sprockets 3020 and crank arms 3022 thereto.
  • a chain 3023 (shown in phantom) is supported on the front sprockets 3020.
  • the mounting member 3014 further includes a front face 3024 that is substantially planar and perpendicular to horizontal plane H.
  • the front face 3024 defines two sets of threaded bores 3026 and 3028 therein.
  • the set of threaded bores 3026 are vertically spaced apart and aligned with one another and the set of bores 3028 are transversely spaced apart and aligned with one another.
  • a separate plate can be provided that defines the bores and is attachable to the remainder of the member 3014.
  • the frame 3000 further includes a mounted component, which in this embodiment is a chain and sprocket guard 3030.
  • the guard is removably coupled to member 3014.
  • the guard 3030 includes a mounting plate 3032, a longitudinal wall 3034 extending therefrom, and an end wall 3036 extending transversely from the longitudinal wall 3034.
  • the mounting plate 3032 defines a plurality of bores that align with bores 3026 and 3028, when the mounting plate 3032 contacts front face 3024.
  • a plurality of threaded fasteners, such as screws 3038 extend through the bores 3032 in the guard and bores 3026 and 3028 to removably connect the guard to the member 3014.
  • the guard 3030 is configured and dimensioned so that it does not interfere with the operation of the sprockets 3020 and the chain 3023.
  • the mounting member 3014 can be formed out of any suitable material that has the performance desired such as metals like titanium and aluminum. However, other materials such as composites and the like can be used.
  • the guard 3030 can be formed out of a variety of materials like metals, plastics and composites and the geometry of the guard can be modified.
  • fasteners 3038 are shown to be screws, other fasteners can be used such as rivets and the like.
  • fasteners can be located on the front face 3024. In use, these fasteners can be disposed through the bores in the guard and the guard can be secured to the frame by nuts or the like. Although four bores and fasteners are shown, any modification to this number is contemplated.
  • the front face can include or a separate plate can be provided that includes a quick release coupling or mounting system, such as a bayonette mounting system that may or may not require a tool to attach and detach the mounted component.
  • a quick release coupling or mounting system such as a bayonette mounting system that may or may not require a tool to attach and detach the mounted component.
  • This type of mounting system may also include a lever for securing the guard to the frame.
  • Alternative mounted components can be configured to be connected to the front face of the mounting member 3014. These components include body panels, fairings or wind guards, nose cones, lights and the like. The body panels, fairings, and nose cones optionally include lights. Also separate lights can be the mounted component.
  • the various mounted components can be configured to be mountable separately or such that the mounting plates are stackable so that combinations of components can be mounted on the bike as the rider desires.
  • the length of the member 3006 and the length of the member 3014 can be decreased so that the member 3014 may or may not be slidable within member 3006.
  • the member 3014 can still provide a support for a mounted component.
  • the mount face 3024 can be oriented and connected in a variety of ways that allows the mounted components to be secured to the frame and operative.
  • the mount face can be directly on the head tube 3004 or the main frame member 3002.
  • the seat may be adjusted by a mechanism other than a quick release assembly.
  • the quick release assembly can be used in a variety of applications requiring such, not just bicycles.
  • the frame can have more than one down tube.
  • the concepts of the present invention can be applied to tandem recumbent bikes as well. Therefore, it will be understood that the appended claims are intended to cover all such modifications and embodiments which come within the spirit and scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)

Abstract

Cette invention se rapporte à une bicyclette améliorée se chevauchant en position allongée, qui comprend un cadre, une partie avant fixée rigide au cadre et une roue avant couplée à la partie avant. Un premier élément est relié au cadre et un second élément est relié pivotant au premier élément, une roue arrière étant couplée rotative au second élément. Un système de suspension arrière, comprenant un amortisseur de choc, peut être prévu entre le cadre et le second élément. Cette invention se rapporte également à un tube de direction qui permet de régler la position du guidon pour diriger la bicyclette. Cette invention concerne en outre un système d'ailette de desserrage rapide et un système de montage à utiliser avec cette bicyclette.
PCT/US2000/023816 1999-08-30 2000-08-30 Bicyclette a suspension integrale se chevauchant en position allongee Ceased WO2001015965A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15136199P 1999-08-30 1999-08-30
US60/151,361 1999-08-30

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WO2001015965A2 true WO2001015965A2 (fr) 2001-03-08
WO2001015965A3 WO2001015965A3 (fr) 2001-06-21

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6585278B1 (en) * 2001-01-30 2003-07-01 Joule Cycles, Inc. Recumbent bicycle with concentric mid-drive and pivot
NL1023658C2 (nl) * 2003-06-13 2004-12-14 Henk Kaaijk Kettinggeleider.
US7234718B1 (en) 2004-10-14 2007-06-26 Morrow David D Bicycle frame
RU2420422C1 (ru) * 2009-11-30 2011-06-10 Сергей Николаевич Лукьянов Велосипед с педалированием и движением академической гребли
DE102011018876A1 (de) * 2011-04-28 2012-10-31 Günter Niebauer Liegerad
EP4098530A1 (fr) * 2021-06-02 2022-12-07 Property Found Spolka z ograniczona odpowiedzialnoscia Bicyclette, en particulier une bicyclette à deux roues, dotée d'un levier de commande

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185782A (en) * 1938-01-12 1940-01-02 Edward B Brittin Clamping device
US3432197A (en) * 1966-06-30 1969-03-11 Mc Donnell Douglas Corp Slider latch
US5419574A (en) * 1991-10-10 1995-05-30 Krumm; Paul J. Adjustable frame recumbent bicycle
US5620196A (en) * 1994-07-18 1997-04-15 Belik; Jaroslav Recumbent bicycle frame
US5584494A (en) * 1994-07-25 1996-12-17 Krumm; Paul J. Fitted recumbent bicycle frame building process
US5516134A (en) * 1994-09-20 1996-05-14 Perfect Season, Inc. Seat for a wheeled vehicle
US5749590A (en) * 1995-07-13 1998-05-12 Roerig; Scott Suspension fork assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6585278B1 (en) * 2001-01-30 2003-07-01 Joule Cycles, Inc. Recumbent bicycle with concentric mid-drive and pivot
NL1023658C2 (nl) * 2003-06-13 2004-12-14 Henk Kaaijk Kettinggeleider.
US7234718B1 (en) 2004-10-14 2007-06-26 Morrow David D Bicycle frame
RU2420422C1 (ru) * 2009-11-30 2011-06-10 Сергей Николаевич Лукьянов Велосипед с педалированием и движением академической гребли
DE102011018876A1 (de) * 2011-04-28 2012-10-31 Günter Niebauer Liegerad
EP4098530A1 (fr) * 2021-06-02 2022-12-07 Property Found Spolka z ograniczona odpowiedzialnoscia Bicyclette, en particulier une bicyclette à deux roues, dotée d'un levier de commande

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