US3736021A - Folding wheel chair - Google Patents

Folding wheel chair Download PDF

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Publication number
US3736021A
US3736021A US00134589A US3736021DA US3736021A US 3736021 A US3736021 A US 3736021A US 00134589 A US00134589 A US 00134589A US 3736021D A US3736021D A US 3736021DA US 3736021 A US3736021 A US 3736021A
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United States
Prior art keywords
members
frame
wheel chair
seat
folding wheel
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Expired - Lifetime
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US00134589A
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English (en)
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O F Maclaren
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Andrews Maclaren Ltd
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Individual
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Assigned to ANDREWS MACLAREN LIMITED, STATION WORKS LONG BUCKBY,COUNTY OF NORTHAMPTON reassignment ANDREWS MACLAREN LIMITED, STATION WORKS LONG BUCKBY,COUNTY OF NORTHAMPTON ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BARBER WILLIAM L. AND MACLAREN MARIE I. PERSONAL RERESENTATIVES OF OWEN F MACLAREN DECEASED
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
    • A61G5/0816—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair
    • A61G5/0825—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair comprising a scissor-type frame, e.g. having pivoting cross bars for enabling folding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
    • A61G5/085—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding up and down, e.g. reducing or expanding the overall height of the wheelchair
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0883—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having locking means for maintaining a folded or unfolded condition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/06—Foldable with a scissor-like mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/20—Catches; Locking or releasing an articulation
    • B62B2205/24—Catches; Locking or releasing an articulation to hold in the folded position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/064—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable the handle bar being parallel to the front leg
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/20—Handle bars; Handles
    • B62B9/206—Handle bars; Handles with two separate bars, i.e. not interconnected

Definitions

  • Wheels are provided at the four corners of the bottom [56] References cued frame portion.
  • the chair may be collapsed by pivoting UNITED STATES PATENTS the frame portions with respect to themselves and to each other while folding the brace members until a 3,390,893 7/1968 MacLaren ..280/39 cane 1ike fi ti is m 2,911,245 11/1959 Kurz ..5/1l1 3,485,510 12/1969 Merlan.... ..297/45 9 Claims, 6 Drawing Figures .arm v Patented May 29, 1973 3,133,021
  • the present invention may therefore be regarded as being a more developed or sophisticated form of the invention of the above Patent and in particular it combines light weight, the dimensional limitation above mentioned, very easy folding and extending, steerability, adequate resilient suspension, adequate eflective tire area, effectively locking brake means, the possibility of self-propulsion by the occupant, all combined with sufficient rigidity when extended to give confidence and appropriate anatomical support to the occupant.
  • the invention further includes the provision'of a leg element on each side of the volume frame, a first end of each leg element being pivotally attached to an interconnected X-frame corner, the second end being pivotally attached to a folding brace element.
  • the first end of each leg element may conveniently be extended downwards and adapted to bear a wheel or a pair of wheels.
  • the leg elements described serve to afford the simultaneous folding of the volume frame in both planes throughout its range of movement.
  • At least two collapsing strut interconnections are provided one associated with the brace elements and the other with the rear X-frame.
  • the elements forming the seat and the back (which are basically of fabric) are supported in such a manner that at two corners of each, they are slidable on the structural framework, while the other two corners are pivotted.
  • the chair is provided with resilient suspension mechanism between its frame elements and each of the four pairs of wheels which mechanism includes a lever fitted to the frame element and at its end rotatably supporting the pair of wheels and this lever supports a further intermediate link element so arranged that when the wheel pair is loaded, an elastomeric pad is resiliently compressed; such suspension may also be provided with an elastomeric recoil cushion.
  • two of the wheel pairs together with the resilient suspension above mentioned aremounted on spindles which are rotatably mounted on substantially vertical axes at the ends of two of the frame members of the chair and the geometry particularly in regard to the suspension levers is arranged to be such that these wheels can castor, to enable the chair to be readily maneuverable: (this provision also protects the structure from lateral rocking stress if the person pushing the chair tries to turn it off a straight course).
  • castoring is in itself a step towards lightening the structure as well as being a considerable convenience.
  • the invention includes an interattachment for an element such as the above referred to spindle to a tubular frame member in which an elastomeric plug is compressed endwise within the tube and therefore seeks to expand radially and this is made use of to tighten one tubular element within another by expanding the former.
  • a complete fitting such as a castoring fitting or the attachment of non-castoring wheel pairs may be fastened in position simply by the use of a spanner or key on a nut or the head of a stub without any additional boring or drilling operations.
  • the invention provides for braking on both the non-castoring wheels; braking on only one would leave the chair free to spin round as on a pivot, which could be alarming or even dangerous.
  • the invention also includes, in cases where it is required, means whereby the occupant of the chair can be self-propelling and self-steering and such means includes drive mechanism to the two non-castoring wheel pairs (or to one wheel of each such pair) which drive mechanism is arranged not to interfere with the folding of the chair (and not to interfere with directional) and is accessible to the occupant for manual operation.
  • the invention includes one particular way of doing this, namely by the provision of a belt C passing around one of the non-castoring wheels and preferably in a groove in the tire thereto, the belt also passing around an idle pulley arranged somewhere in the region of the hip of the occupant or between the hip and the knee and external to the framework, together with resiliently loaded means such as a jockey pulley or a fairlead the resilient loading being such that when the frame of the chair is folded the jockey pulley or fairlead take up the slack of the belt which is the result of folding.
  • FIG. 1 is a side elevation of the extended structure of a wheel chair according to the invention, there being illustrated in chain-line a simple construction for selfpropulsion;
  • FIG. 2 is an elevational view from the front of the chair
  • FIG. 3 is a side elevation of the same, illustrating a partially-folded situation
  • FIG. 4 is a further front elevation the structure being partially folded as in FIG. 2;
  • FIG. 5 illustrates the chair in its completely folded condition
  • FIG. 6 is a partial view illustrating on a larger scale, part of the structure seen in the preceding Figures, to make clear the wheel suspension system.
  • Two X-frames are provided; l is the rear frame and 2 the bottom frame; each consists of two tubular members 1A and 1B and 2A and 28 on elements 1B or 2B of each X-frame, being slightly bent so that although they are pivotted at their intersections 1C, 2C, their extremities lie substantially in respective common planes.
  • the complete structure includes side elements 3 and 4 which can conveniently be regarded as hypotenuse" or brace elements. Such elements are each formed by two lengths of tube section, seen as 3A and 3B in FIG. 1.
  • each of these knuckle-joints has a releasable catch, formed by a lever 3F (4F) pivotted at 3G (4G) to the strut length 3A (4A) and loaded by a tension spring 3H (4H) to tend to engate a notch with a stud at 3J (4J).
  • each strut 3 and 4 are pivotally connected as at 3C and 3D to the distal comers of the X-frames l and 2, by joints which have freedom of universal movement to the extent required by the extension and folding of the structure.
  • the side elements 3 and 4 in the extended state of the chair constitute framemembers which are basically straight, and which geometrically may each be regarded as the hypotenuse of a near-rightangle triangle as viewed in side elevation (FIG. 1). They brace the whole structure when aligned, as in FIG. 1.
  • the volume-frame so constituted therefore consists of two hypotenuse braces or struts 3 and 4, and two X-frames 1 and 2.
  • the rigidity of this volume-frame is ensured by two pairs of collapsible struts which are toggle links 5, 6, an upper pair 5A, 5B, and a lower pair 6A, 6B. These are knuckle jointed at 5C and 6C respectively, in joints which just pass the dead-center condition when the chair is extended, i.e., as seen in FIG. 1. During folding, they go through the angles to be seen in FIG. 4.
  • the links 5, 6, are pivotally attached at 5D, 6D, respectively to the X-frame members 1A, 1B and to the hypotenuse strut parts 3B, 4B.
  • toggle links 5, 6, in effect spread and lock the X-frame 1 directly, acting between 1A and 1B.
  • the other links 6A, 6B act directly between the lower brace elements 3B, 4B, and therefore almost directly on the X-frame 2.
  • the lower toggle (6A, 6B) contributes importantly to the rigidity of the volumeframe as a whole.
  • leg elements 7, 8 in the form of tubes which are pivotally attached respectively at 7A, 8A, to the brace members 3A, 4A.
  • the elements 7, 8, have pivotted to them universally at 9 the lower corners of the X-frame 1 and similarly the rear corners of the X-frame 2, at 10.
  • Each such universal connection is, conveniently, constructed by the use of two pivot pins at right angles; the two connections at respective corners are so near to each other that for all practical purposes it can be considered that the two X-frames are interpivotted with each other as well as with the respective leg element, on intersecting axes.
  • each wheel pair runs on a spindle 12 carried by a pair of lever-like plates 13 which are pivotal on a pin 14 supported by the bottom end of the leg 7 or 8 and which are held spaced by a rivet 14A.
  • the plates 13 are also pivotally attached by a pair of coaxial pins 15 to a U-sectioned stirrup 16.
  • a block 17 of rubber or other elastomer which acts as a compression spring controlling the up-and-down movements of the wheel-pair 11 relatively to the leg 7.
  • the plates 13 are also interconnected by a pin 18 which is surrounded by a length of rubber or elastomeric tubing 19; when this abuts the bottom of the leg 7 it acts as a recoil cushion, to damp out shock if the wheel-pair drops suddenly relatively to its leg.
  • This simple and effective resilient suspension is well adapted to the use of paired wheels (in itself an important factor in weight distribution combined with small dimensions) and, as will now be seen, it lends itself to repetition for castoring wheels, a requirement related to the weight of the occupant, to maneuverability, and to the balancing out of loads in the structure.
  • the bottom ends of the members 3B, 4B have inserted into them short bent lengths of tube 20 to mount the two front wheel-pairs.
  • These are illustrated with the same references because they, and their resilient suspensions, are identical with the rear (non-castoring) pairs. The difference resides only in the mounting, as follows.
  • the extension part 20 rotatably carries a sleeve 21 and it is to this sleeve that the whole wheel pair and suspension unit is attached.
  • the sleeve 21 is rotatable through 360 and thus each front wheel pair is fully free to castor about the axis of the sleeve 21, which is vertical; the wheel spindle 12 is so located by reason of the lever-like plates 13 that the wheel pair trails for castoring purposes.
  • a thrust bearing is provided at the end of tube 20. This may consist of a sandwich of steel plastics steel washers, or of a ballbearing or taper roller bearing.
  • each pair is provided with a brake, convenient for foot operation.
  • Each brake comprises a pedal lever 30 (FIG. 3) and a pair of toggle arms 31, 32, with a spring 33, all so arranged that when depressed at its end 30A by foot, the spring 33, by exerting a pull at the pivot point joining 31 and 32 pulls the bent-over end 32A of the remote toggle arm 32 into direct and forcible contact with the tire of a wheel of the pair.
  • the brake is released by opposite action, upward movement at 3A pulling it off by collapsing the toggle formed by 31, 32 the third pivot, between 30 and 31, is located offset from the line of the other two thus affording a dead-center effect to hold the brake off.
  • tubular members for example the front wheel pair assemblies
  • the fittings at the ends of tubular members may be attached by providing, in manner known per se, a tube within a rubber sleeve in compression between two annular faces (e.g., washers) which is squeezed axially by tightening a nut or stud, thus compressing the sleeve axially.
  • two annular faces e.g., washers
  • This can be so arranged that an inner tubular member is firmly tightened within an outer tube, and it affords a very simple form of interattachment which may, incidentally, be a bad transmitter of vibration.
  • FIGS. 1
  • the back-rest of the chair is basically a panel 35 of fabric, attached by its side margins to two rigid elements 36.
  • Each element 36 is pivotted at its upper end at 37 to a slide member 37A which slides on member 3A (4A) and at its lower end at 33 it is pivotted to a seat tube 41 (see below) to a slide part 34 which is slidable on 7 or 8.
  • a slide member 37A which slides on member 3A (4A) and at its lower end at 33 it is pivotted to a seat tube 41 (see below) to a slide part 34 which is slidable on 7 or 8.
  • the seat is a second fabric panel 40 and is attached at its lateral margins to two rigid seat tube or rod parts 41 which are preferably of somewhat oval section (see FIG. 2).
  • the parts 41 are pivotted at 3F, 4F, to the brace elements 38, 4B, and project somewhat forward of the brace members (see FIG. 1), as well as extending rearwards to pivot joints at 42 to slide parts 43 which are on the leg members 7, 8.
  • the slides 43 move downwards, (see FIG. 3).
  • a foot rest in the form of a strip of fabric 50 extends to across the chair between the bottom ends of elements 3B, 4B and adjustment of its position may be provided, for example by attaching it to movable clips or collars, such as 50A to which the strip is preferably pivotally attached as at 50B.
  • the upper ends of the elements 3A, 4A are bent over to form handles (see e.g., FIG. 1) and a strip of fabric is preferably provided, as at 51, to prevent accidentally letting go of the handles.
  • a spring catch Near the bottom ends of the members 3B, there is provided a spring catch to retain the folded condition of the chair.
  • FIG. 1 An indication of this is shown diagrammatically in FIG. 1 in chain line.
  • One of the wheels of each of the rear wheel pairs 11 is provided with a grooved pulley 11A either on its outer or inner flank.
  • a belt, or chain, or cable 60 In the groove runs a belt, or chain, or cable 60 nearly parallel and coextensive with a leg 7; the belt runs over a pair of pulleys 62 borne for free rotation on or near the axis of interconnection between the leg 7 and strut part 3A; the path of the belt 60 thence runs over a pulley 63 borne by a fitting 63A on strut member 3A.
  • the pulley 63 has, fast with it, a hand crank 64 or a hand wheel, located accessibly to the occupant of the chair: the handle 64 or wheel may be easily detachable or foldable.
  • the belt 60 may be led into and run mainly within the leg 7 and if required strut part 3A.
  • the pulleys may be protected by shrouding. Braking operable by the occupant may be provided, either by way of releasable cable-grip or by stopping the handle 64 or wheel. There are various alternatives, for self propulsion, such as a chain and free-wheel sprocket the chain being spring returned after being pulled by a hand lever. Further jockey pulley or fairlead provision may be made to keep the belt or cable in tension or to take up slack when the chair is folded. A pair of the wheels 1 1 may be inter-attached so that both of the pair are driven by the pulley 11A. Such a device may well be adequate for the relatively minor and easy selfpropelled mobility required when the chair is used on ordinary floors and passageways, and for such use has no pretensions to being completely effective in all circumstances, e.g. if obstacles or rough ground are encountered.
  • FIG. 1 Such a device is indicated in FIG. 1 in broken-line.
  • a table-top is in two halves 70, 71, the forward half 71 having pins 71A to engage sockets 70A for coplanar interattachment; the pins 71A may be hinged to 71 so as to be foldable to reduce overall dimensions.
  • the half 70 has, attached by vertical pivots 73, two rearwardly extending arms 74 which have bifurcated ends at 74A to slide into engagement on studs 74B which are fixed to the elements 3 and project laterally.
  • spring catches 75 (which may be identical with the catch 56) to engage and lock on the studs 74B.
  • Pivotted to the arms 74 on a transverse axis by pins 76 Pivotted to the arms 74 on a transverse axis by pins 76 are struts 77 of which the ends are formed to spigot into the tubular ends of the seat members 41.
  • the latches 75 are disengaged, the fork ends 74A are thereby released from the studs 74B, the struts 77 are freed from the members 41.
  • the table is now detached.
  • the struts 77 are folded up to the arms 74, and these are then folded against the near edge of the half 70 (the struts 77 swinging with them). 70 and 71 are detached, and the whole table is now of such (folded) dimensions that it can be stowed within the dimensional envelope of the folded chair.
  • a box or pocket may be provided for its stowage.
  • a folding wheel chair having a frame structure comprising a bottom cross frame of interpivoted rigid members, a back cross frame of interpivoted rigid members, a double-axis pivot joint inter-pivotally attaching one of each of the bottom frame members to one of each of the back frame members at each of two comers of said cross frames, said axes being oriented to permit the members of each cross frame to pivot with respect to each other and to permit said cross frames to pivot with respect to each other, two foldable brace members pivotally attached to the bottom cross frame near the other two comers of the bottom cross frame, respectively, and to the back cross frame near the other two comers of the back cross frame, respectively, a leg element on each side of the frame structure, a first end of each leg element pivotally attached at one of said inter-pivotally attaching corners and the second end of each leg element pivotally attached to the foldable brace member on the same side of the frame structure as the leg whose end is attached thereto, two substantially parallel seat bars pivotally attached to the bra
  • each said brace member comprises two pivotally interattached members and a spring lock to lock said pivotally interattached members in their aligned extended condition.
  • a folding wheel chair in which one pair of said wheels are laterally disposed and freely castorable through 360, the other pair of said wheels are laterally disposed and have a fixed direction of tracking.
  • a folding wheel chair according to claim 4 further comprising brake means for braking said pair of fixed tracking wheels.
  • a folding wheel chair according to claim 1, further comprising lever arms each having one end pivotally attached to the frame structure and said wheels mounted on a free end thereof, and elastomeric pads mounted on either side of said lever arms to check the vertical movement thereof and provide a shock absorbing action.
  • a folding wheel chair further comprising two substantially parallel laterallyspaced seat-back bars pivotally attached at one end to said seat bars and slidably attached at the other end to said brace members.
  • a folding wheel chair according to claim 1 additionally comprising a seat of pliable material attached between said two seat bars.
  • a folding wheel chair according to claim 7 additionally comprising a seat-back of pliable material attached between said seat-back bars.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
US00134589A 1970-04-17 1971-04-16 Folding wheel chair Expired - Lifetime US3736021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1848970 1970-04-17

Publications (1)

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US3736021A true US3736021A (en) 1973-05-29

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ID=10113310

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Application Number Title Priority Date Filing Date
US00134589A Expired - Lifetime US3736021A (en) 1970-04-17 1971-04-16 Folding wheel chair

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US (1) US3736021A (de)
JP (1) JPS5027731Y2 (de)
CA (1) CA940037A (de)
CH (1) CH519334A (de)
DE (1) DE2118136A1 (de)
GB (1) GB1321085A (de)

Cited By (38)

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US3968991A (en) * 1972-11-01 1976-07-13 Gannet Holdings Limited Collapsible seat structures
USD246518S (en) 1975-11-03 1977-11-29 Gannet Holdings Limited Baby carriage
US4245849A (en) * 1978-10-31 1981-01-20 Les Entreprises Rotot Ltee Collapsible support devices and structure
US4369987A (en) * 1981-03-16 1983-01-25 Witherell Nancy B Folding wheeled chair/luggage carrier
USD288913S (en) 1983-11-10 1987-03-24 Andrews Maclaren Ltd. Adjustable stroller
US5669623A (en) * 1994-09-21 1997-09-23 Aprica Kassai Kabushikikaisha Baby carriage and method of manufacturing seat plate for its seat
US5669625A (en) * 1995-03-29 1997-09-23 Jane, S.A. Folding child's pushchair
US5676419A (en) * 1994-08-19 1997-10-14 Aprica Kassai Kabushikikaisha Seat for baby carriage
US5687984A (en) * 1995-08-02 1997-11-18 Samuel; Violet S. Collapsing cart
US6068284A (en) * 1997-07-29 2000-05-30 Graco Children's Products Inc. Stroller with one hand release mechanism and one hand release mechanism thereof
US6378883B1 (en) * 2000-01-11 2002-04-30 Aaron J. Epstein Motorized walker/wheelchair and method
US6557885B1 (en) 1997-08-15 2003-05-06 Graco Children's Products Inc. Stroller with release latch
US20030155746A1 (en) * 2002-02-15 2003-08-21 Watkins Mervyn M. Folding seat support structure
US20070056524A1 (en) * 2005-07-28 2007-03-15 Rosanne Barca Apparatus and methods for containing and transporting animals
US20070284853A1 (en) * 2006-06-07 2007-12-13 Jane, S.A. Foldable pushchair for babies and small children
US20080143082A1 (en) * 2006-12-19 2008-06-19 Wonderland Nurserygoods Co., Ltd. Frame assembly for double-seat baby stroller
US20080217966A1 (en) * 2007-03-05 2008-09-11 Cone Richard E Flat fold stroller
USD580307S1 (en) * 2007-12-21 2008-11-11 Aprica Ikujikenkyukai Aprica Kassai Kabushikikaisha Baby carriage
USD587634S1 (en) * 2006-11-07 2009-03-03 Baby Planet, Llc Baby stroller frame with canopy
USD589850S1 (en) * 2007-06-28 2009-04-07 Play, S.A. Pushchair
US20090200838A1 (en) * 2008-02-08 2009-08-13 Cone Ii Richard E Folding stroller including locking mechanism
US20090320822A1 (en) * 2008-06-26 2009-12-31 Yeh Jui-Ju Portable barbeque
US20110227373A1 (en) * 2010-03-16 2011-09-22 Dick Cone Industrial Design, Inc. Folding stroller including a footrest
US9346479B1 (en) * 2015-03-17 2016-05-24 Artsana USA, Inc Travel stroller seat support articulated folding mechanism
US20170008544A1 (en) * 2014-02-14 2017-01-12 Trionic Sverige Ab Collapsible wheeled support or carrier
US9849057B1 (en) 2016-11-18 2017-12-26 More Joyful Living, LLC Stroller rollator
USD851543S1 (en) 2017-08-18 2019-06-18 More Joyful Living, LLC Stroller rollator
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EP3463239B1 (de) * 2016-05-26 2022-10-05 Otto Bock Mobility Solutions GmbH Mobilitätshilfe
US9849057B1 (en) 2016-11-18 2017-12-26 More Joyful Living, LLC Stroller rollator
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USD851543S1 (en) 2017-08-18 2019-06-18 More Joyful Living, LLC Stroller rollator
US11389003B2 (en) 2018-01-12 2022-07-19 Yeti Coolers, Llc Portable chair
US10722034B2 (en) 2018-01-12 2020-07-28 Yeti Coolers, Llc Portable chair
US12262818B2 (en) 2018-01-12 2025-04-01 Yeti Coolers, Llc Portable chair
US10874219B2 (en) 2018-01-12 2020-12-29 Yeti Coolers, Llc Portable chair
US11744370B2 (en) 2018-01-12 2023-09-05 Yeti Coolers, Llc Portable chair
US12448021B2 (en) * 2019-01-08 2025-10-21 Wonderland Switzerland Ag Child stroller frame
US20240059342A1 (en) * 2019-01-08 2024-02-22 Wonderland Switzerland Ag Child stroller frame
US11834091B2 (en) * 2019-01-08 2023-12-05 Wonderland Switzerland Ag Child stroller frame
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US11659930B1 (en) * 2021-11-22 2023-05-30 Te-Lung Chen Foldable chair
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Also Published As

Publication number Publication date
DE2118136A1 (de) 1971-10-28
JPS4719962U (de) 1972-11-06
CA940037A (en) 1974-01-15
GB1321085A (en) 1973-06-20
CH519334A (de) 1972-02-29
JPS5027731Y2 (de) 1975-08-16

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