US3263777A - Lift truck carrier with a lost motion operator platform - Google Patents

Lift truck carrier with a lost motion operator platform Download PDF

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Publication number
US3263777A
US3263777A US354658A US35465864A US3263777A US 3263777 A US3263777 A US 3263777A US 354658 A US354658 A US 354658A US 35465864 A US35465864 A US 35465864A US 3263777 A US3263777 A US 3263777A
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Prior art keywords
fork
truck
lift truck
movement
load
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US354658A
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English (en)
Inventor
Robichon Rene
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F Hoffmann La Roche AG
Hoffmann La Roche Inc
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F Hoffmann La Roche AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/07—Floor-to-roof stacking devices, e.g. "stacker cranes", "retrievers"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks

Definitions

  • the present invention is concerned with a fork-lift truck of the type which is provided with a fork-lift means.
  • Fork-lift trucks have widespread application today in every facet of commerce. When they are exclusively used out-of-doors or in uncovered storage areas, they are propelled by conventional internal combustion engines. When they are used exclusively in covered areas, they are provided generally with an accumulator, e.g. a storage battery, and are driven by means of electric motors which are energized by the said accumulator. Such driving systems are well known in the prior art and date back to the first use of electric trucks.
  • fork-lift trucks required that there be available for stacking purposes either empty or full pallets, containers and the like. If such were not available, the trucks would generally stand idle. Furthermore, such fork-lift trucks could not be utilized eflica-ciously in situations requiring the handling of small individual articles, e.g. such as those intended for direct use by the consumer or those which, due to their size, could be transmitted in large amounts in a relatively small package. Thus, forklift trucks have been found not to be particularly useful where it was desired to store such type materials in different designated compartments of shelving or Where it was desired to provide a myriad of different items of such a class in a pallet or container to satisfy a particular need, e.g. to fill the requirements of a customers order.
  • the object of the present invention to provide a fork-lift truck which can be used not only in the manner that conventional fork-lift trucks are commonly used, but also for utilization in warehousing small-type materials such as small. sized packets, polyethylene containers and the like, and which trucks are so-sized as to render them capable of being driven betweenoppositely disposed shelving disposed in close confronting relationship.
  • This makes possible an easy transfer of diverse package goods, individual small-type articles and the. like from thepallets, containers and the like into. the areas of storage designated for suchcornmodities which may be situated at different levels and different places on the same floor and vice versa.
  • the fork-lift truck is thus characterized in that it is not only utilizable for the stacking or movement about of pallets, but is also extremely useful in the partial loading of material contained in a pallet, sequentially, into the various storage areas designated therefor, and, conversely, for the filling of a pallet or container to satisfy a particular customers requirement from various and diverse positions in the storage area. 7
  • This end is achieved by virtue of providing such fork-lift trucks with a moveable loading stand which is disposed in convenient relation to the platform on which the operator of the vehicle positions himself when driving the vehicle from one place to another.
  • the loading stand for the loading and unloading of'a pallet is synchronized for movement with the raising of carrier arms so that the lifted pallet is situated at a good working level over the loading stand, and the convenient loading or unloading position of the pallet is lowermost at approximately the lowermost position of the loading stand.
  • the fork-lift truck since the fork-lift truck, according to the present invention, is to be primarily utilized for the partial or piecemeal loading or unloading in closed storage area, to avoid the development of noxious fumes, it is preferably provided for this purpose with a driving system which is energized by electric means. Moreover, since the fork-lift truck of the present invention is intended to be utilized in connection with storage shelves which are generally in close confronting relation, it is evident that it must be of the smallest dimensions possible. Thus, the use of accumulators as the source of energy for the electric driving system is inconvenient due to space considerations.
  • the fork-lift truck of the present invention is energized from power supplied by a pick-up rail through a cable which is operatively connected to the fork-lift truck.
  • the pick-up rail is of a type well known in the art.
  • the fork-lift truck of the present invention is particularly advantageous since it requires a minimum of space due to the slenderness of its construction. In a preferred embodiment, it is cm. in width.
  • FIGURE 1 is a side elevation view of the fork-lift truck in accordance with the present invention
  • FIGURE 2 shows a plan view of the fork-lift truck in section taken along line IIII of FIGURE 1;
  • FIGURE 3 is a front elevation of the fork-lift truck in section taken along the line III-III of FIGURE 1.
  • the fork-lift truck illustrated in the accompanying drawing, consists of a chassis 1 having mounted thereon front wheels 2 and 3 and rear wheels 4 and 5.
  • Rear wheel 4 is the drive wheel.
  • a lifting and carrying. carniage comprises carrier arms 6 and 7 and frame 8. Carrier arms 6 and 7 are in spaced parallel relation and extend fowardly and horizontally from'frarne 8 to which they are integrally secured, said lifting and carrying oarriage 90 being adapted for vertical movement relative to chassis 1 in a manner more particularly made evident hereinafter.
  • the chassis 1 includes upright channelshaped guide rails 9 and 10 which are positioned perpendicularly with respect to the base of the fork-lift truck in spaced parallel relation and are situated on the truck approximately equidistant from the said frontand rear wheels 2, 3, 4 and 5.
  • a loading stand 11 is provided for the fork-lift truck pallet unloader or loader to stand upon when effecting the transfer of material from a pallet or the like to a particular storage area designated for the material, or from a storage area to a pallet.
  • Fixedly secured to the stand 11 are spaced supporting arm 12 and 13 which extend at right angles and'upwardly from the plane of stand 11. Supporting arms 12 and 13 are moveably mounted on guide rails 9 and 10 for movement in a vertical plane.
  • a U-shaped steering lever 20 is positioned on an axially rotatable shaft 21 arranged perpendicularly with respect to platform 14 and rotatably received in an opening thereof.
  • Shaft 21 is fixedly secured at its lower end to a bearing housing 22 which houses the rear wheel 4.
  • the bearing housing is axially rotatablle conjointly with shaft 21.
  • Chassis 1 is provided with two horizontally-extending rectangular parallel beams 23 and 24 which define an opening in which the fork-lift carriage 90 is adapted to be received as seen in dotted line in FIGURE 1.
  • the rear ends of beams 23 and 24 are secured to the guide rails 9 and 10, and the sides thereof project transversely therefrom as best seen in FIGURE 3.
  • the transverse projections permit the fork-lift truck operator to move from platform 14 to stand 11 under the most crowded conditions.
  • Bifurcated portions are provided at the free ends of beams 23 and 24 to receive front wheels 2 and 3 and, thus, form seats therefor.
  • Guide rails 9 and 10 are reinforced at their lower ends by a U-shaped reinforcing member and at their upper ends by a tie beam 61.
  • drive control rests, in part, on platform 14 and includes the above-mentioned members 16 to 19.
  • a cable 25 Positioned on cable drum 16 is a cable 25, the free end of which is connected to a pick-up bar (not shown). Cable is adapted to be rolled out of the cable drum on movement of the fork-lift truck away from the pick-up bar and rolled into the cable drum on movement-of the truck toward the pick-up bar.
  • the withdrawal of cable 25 into cable drum 16 is eifected by a spring biasing means (not shown) associated with cable drum 16, according to known techniques.
  • the cable 25 passes through a guide arm 26 which is held in place by an L-shaped bracket 60. L-shaped bracket 60 is securely fastened to guide rail 9.
  • the end of cable 25 is connected to the pick-up head on the current pick-up mi l which can be positioned, for example, on the ceiling'of an enclosed storage area which may be a warehouse, a factory inventory depot and the like.
  • the cable guide arm 26 has a cable receiving guide funnel 81 through which the cable runs. Within the guide funnel are mounted two freely rotatable rollers 80 which serve as a means for guiding the cable during the, movement thereof into and out of the cable drum.
  • housing 17 Positioned beneath cable drum 16 is housing 17 in which the electrical control panel is situated. In an openable enclosure under the housing 17, there is situ-' ated electric motor 18. Motor 18 actuates hydraulic pump 19 arranged thereunder which energizes, as is later described, the means for raising and lowering the forklift carriage and the means for propelling the forklift trucktoandfro.
  • a bar 27, as seen in FIGURES 1 and 2, is'arranged adjacent driver platform 14 opposite to the drive control p 15 and serves as a safety device for the protection of an operator standing on platform 14.
  • Drive lever 28 Provided within easy reach of the operator of the fork-lift truck, when standing on platform 14, is drive lever 28.
  • a master switch 29 (FIGURE 2) which controls, selectively, the feeding of current from the pick-up rail through the cable 25 into the operating system of the fork-lift truck.
  • a key ac- 4 tuated switch 30 as seen in FIGURE 2.
  • the switch 30 is normally open and can only be closed by the insertion therein of the proper ,key means.
  • the key operated switch is open, all the circuits associated with the fork-lift truck are broken.
  • Such a key operated switch is known in the art and is not illustrated in detail in the accompanying drawing.
  • the fork-lift truck is propelled by a hydraulically actuated motor 31 (FIGURE 3) whose drive shaft is fixedly secured to the axle of drive wheel 4.
  • Motor 31 is mounted on bearing housing 22 of the rear wheel 4 so that it is positioned on the side of drive wheel 4 which faces rear Wheel 5.
  • shaft 21 and bearing housing 22 of drive wheel 4 are conjointly rotatable and are actuated for such rotation by the exertion of pressure in either direction on the U-shaped steering lever 20.
  • Motor 31 and bearing housing 22 rotate about the axis of shaft 21 and the corresponding axis of wheel 4 which is perpendicular to the plane of the surface on which the fork-lift truck is positioned.
  • U-shaped lever 20 is rotatable only in either direction from the position thereof shown in FIGURES 1 and 2.
  • rotational motion of drive wheel 4, bearing housing 22 and motor 31 about their vertical axes is limited to
  • platform 14 can be extended to a point whereat motor 31, at its limit of movement about the axis of drive wheel 4, does not project from under platform 14 at any time during such rotational movement.
  • the fork-lift truck can be provided with a conventional bumper means, e.g. a rubber disk, a bar or the like which is positioned adjacent the rear edge of platform 14, at such a point whereat motor 31 is permitted to rotate freely within its limits of rotational movement with-out fear of it contacting an object closely adjacent to the truck.
  • a conventional bumper means e.g. a rubber disk, a bar or the like which is positioned adjacent the rear edge of platform 14, at such a point whereat motor 31 is permitted to rotate freely within its limits of rotational movement with-out fear of it contacting an object closely adjacent to the truck.
  • Pressure cylinder 32 which is secured to the frame of the chassis between guide rails 9 and 10 effects the raising and lowering of the carriage 90.
  • a piston 33 which piston is raised perpendicularly by the hydraulic pressure supplied by hydraulic pump 19.
  • the upper end of the piston 33 has a portion which protrudes from pressure cylinder 32 at all times.
  • Piston 33 carries a freely rotatable chain roller 34 attached thereto by pintle 32a.
  • Movably mounted on chain roller 34 is a chain 35.
  • the chain 35 is secured at one end 36 to the drive control housing and at its other end 37 to frame 8 which is integral with carrier arms 6 and 7.
  • the vertical movement of frame 8 is controlled by runner means provided by the channel-shaped configuration of guide rails 9 and 10.
  • Such channel-shaped guide rails are arranged on the fork-lift truck so that their webbed faces are on the outer sides of the upright rectangular frame of which they, tiebeam 61 and the U- sh-aped reinforcing member form a part.
  • Guide wheels 40 are received in the channel-shaped openings of guide rails 9 and 10.
  • Supporting strips 38 and 39 are situatedbetween guide rails 9 and 10 and are, respectively, in
  • Strips 38 and 39 each carry two of the last-mentioned guide wheels 40 in spaced planer relationship and are integrally fastened at right angles to frame 8.
  • Guide wheels 40 due to their being positioned in the channel-shaped portions of guide rails 9 and .10, function to operatively connect the carriage 90 to the guide rails for vertical sliding movement and against transverse movement relative thereto.
  • a loading stand 11 is arranged for movement within a rectangular opening in frame 8. Stand 11 is operatively supported by guide rails 9 and (10 for lost-motion relative to frame 8 in the following manner.
  • Loading stand 11 is provided, on the side thereof facing guide rails 9 and :10, as best seen in FIG- URE 2, with upright planer bars 12 and 113. Bars 12 and 13 carry perpendicularly disposed thereto at their upper end, supports 44 and 45. The supports 44 and 45 each fixedly carry at their outer ends, roller means 48. The sides of supports 44 and 45, in confronting relation with roller means 48, are juxtaposed to the webs of guide rails 9 and 10 so that roller means 48 bear upon the rearwardly positioned sides of guide rails 9 and 10.
  • supports 46 and 47 Disposed downwardly on bars 12 and 13 from the supports 44 and 45, are supports 46 and 47 which also extend rearwardly at right angles from bars 12 and 13. Supports 46 and 47 have secured thereto by a pintle means rollers 50 and 51. Rollers 50 and 51 bear upon the sides of guide rails 9 and 10 opposite to the sides that roller means 48 bear against and thus combine with roller means 48 to maintain loading stand 11 against transverse movement while permitting sliding movement thereof in a vertical direction along the guide rails.
  • Loading stand 11 has no separate driving means, but it is connected by lost-motion means to frame 8 and arms 6 and 7.
  • Angle plates 52 and 53 extend from bars 112 and 13 over the upper edge of frame 8. Thus, the angle plates always lie over frame 8 and, accordingly, are positioned in the path of upward movement thereof.
  • Loading stand 11 is elevated when frame 8 is moved upwardly.
  • the angle plates are positioned on iron bars 12 and 13 at a height that only permits movement of loading stand 11 in an upward direction when the surface of a pallet to be unloaded lies approximately 80 c.m. higher than the base of the loading stand 11, i.e. at approximately a good working level above the loading stand.
  • the loading stand 11 When lowering frame 8 from an upper position, the loading stand 11 reaches its lowermost position on the fork-lift truck before frame '8 reaches the lowermost position of its movement.
  • the lowermost position of loading stand 11 is determined by projections 54 and 55 which are positioned on guide rails 9 and 10 on the web side thereof as seen in FIGURE 3. Such projections project into the path of vertical movement of supports 46 and 47 on bars 12 and '13.
  • the projections 54 and 55 and the supports 46 and 47 therefore combine to serve as means to limit downward movement of stand 11.
  • frame 8 when frame 8 is actuated in an upward direction by motion imparted thereto via piston 33, after a portion of such upward movement is completed, it engages angle plates 52 and 53.
  • Frame '8 thereafter, carries loading stand 11 with it as it continues its upward movement toward a desired position.
  • stand 11 When frame 8 is actuated in a downward direction from such desired position, stand 11 moves downwardly therewith until supports 46 and 47 engage projections 54 and 55 positioned in the path of movement thereof. On supports 46 and 47 abutting projections 54 and 55, further downward movement of stand 11 is precluded and frame 8 continues the movement thereof to its lowermost position alone.
  • a push-button switch 59 having 3 push-button members for control, respectively, of upward movement *(Up), of downward movement '(Down) and the inoperative condition (Off).
  • This switch is operatively connected to frame 8 and functions as the means for controlling the movement of frame 8 to a desired level.
  • the drive lever 28 functions to actuate the system which imparts propelling motion to the fork-lift truck.
  • the push-button switch 59 functions to actuate the system which is responsible for the vertical movement of carriage and the stand 11 operatively connected thereto.
  • the propelling motion is controlled by motor 31 and the raising and lowering of the carriage 90 is controlled by the hydraulic pressure provided by motor 18 through piston 33 and chain 35.
  • key switch 30 Before any electrical energi-zation of any of the mechanisms of the fork-lift truck can be effected, it is essential that key switch 30 be in closed condition. On insertion of the proper key in the cylinder of the key switch 30 and movement thereof to the operative On position, the fork-lift truck is ready for operation. The circuit to electrical motor 18 can then be completed on movement of main switch 29 to the On position. Motor 18 actuates the hydraulic pump 19. Hydraulic pressure produced by the hydraulic pump acts so long as the carriage 90 is not set in motion so that the unillustrated pressure release valve opens and the pressure fluid circulates in a closed system.
  • Actuation of the drive lever 28 from the Off position into positions which will result in the forward or backward movement of the fork-lift truck opens an electrical control valve (not shown), according to the procedures known in the art, which conducts the pressure fluid in one or the other direction through the motor 31.
  • Drive wheel 4 is then rotated in either the forward or the backward direction of drive.
  • the electric push-button switch 59 as is noted above, when actuated, results in the raising or lowering of carriage 90.
  • the loading stand 11 is shown in dotted lines in its lowermost position. In this position of the loading stand 11, the operator can step from driver platform 14 onto the base of loading stand 11 which is situated at approximately the same height as driver platform 14.
  • plate 62 positioned about the loading stand 11, can be reduced in dimension on one side, preferably the side opposite that which safety device 27 is positioned, to facilitate entry onto the loading stand 11, e.g. the plate 62 can be only 5 to 10 cm. high.
  • the fork-lift truck can be eflicaciously made to perform its intended function by a single individual. This is irrespective of the amount of loading or unloading that is required, or the heights at which certain specified material have to be put.
  • the operator of the vehicle first initiates movement of the truck to a designated storage area. When such area is reached, he merely steps over to the load-ing stand 11 and, when appropriate, elevates the carriage 90 to the desired height.
  • Safety pedals sometimes called dead mans pedals, are provided in the base of the loading stand 11, as illustrated in FIGURES 1 to 3. Such pedals are operatively connected to switch means which are in series with a circuit which includes the push-button switch 59.
  • switch means which are in series with a circuit which includes the push-button switch 59.
  • carriage 90' can neither be raised nor lowered. Only when the individual standing on the loading stand 11 has both feet on such pedals can the raising or lowering of carriage 90 be effected. It is readily apparent that such a feature imparts to the fork lift device of the present invention an effective way of assuring, as much as is possible, the safety of the operator of the fork-lift truck.
  • the so-called dead mans pedal assures that 'a person who is stepping onto the stand 11 does not suffer severe injury by an inadvertent closing of one of the push-button switches on switch 59.
  • the loading stand 11 can be provided, if desired, with a surrounding screen which may be in the nature of 30 to 40 cm. high and thus another safety feature is provided which serves to avoid injury to an alighter who might attempt to mount the loading stand 11 when the system controlling frame 8 is in operation. It is only constructed with a lowered side, as described above, in order to render stand 11 easily accessible to the person stepping from driver platform 14 to loading stand 11.
  • the carrier arms 6 and 1 of the carriage 90 are illustrated by dotted lines on the elevated frame 8 in FIGURE 3.
  • the carrier arms are not, themselves, visible in the section shown in FIGURE 3, but are included therein for the purpose of clarification. I
  • a fork-lift truck comprising controls for driving the truck positioned on the rear portion ofthe truck, a load handling frame positioned on the front portion of the;
  • said load-handling frame comprising an open framework adjacent said mast and a load carrying portion secured to said framework and extending outwardly from the foremost portion of the framework, an operator platform on the front portion of the truck adjacent the load-handling frame and mounted for vertical motion on the said vertical mast, and a lost-motion connection between the said load handling frame and the said operator platform whereby the frame maybe moved completely above the operator platform before causing vertical motion thereof.
  • transverse means extending in a horizontal plane along one side of said truck from the driving platform to aposition adjacent the operator platform when in its lowermost position of vertical movement, said transverse means having an exposed, free, planar upper surface, said surfaee constituting a walkway to permit move- 9 about the outside of the vertical mast without alighting from the fork-lift truck.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Loading Or Unloading Of Vehicles (AREA)
  • De-Stacking Of Articles (AREA)
US354658A 1963-04-19 1964-03-25 Lift truck carrier with a lost motion operator platform Expired - Lifetime US3263777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH489763A CH390793A (de) 1963-04-19 1963-04-19 Gabelstapler

Publications (1)

Publication Number Publication Date
US3263777A true US3263777A (en) 1966-08-02

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ID=4284428

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Application Number Title Priority Date Filing Date
US354658A Expired - Lifetime US3263777A (en) 1963-04-19 1964-03-25 Lift truck carrier with a lost motion operator platform

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US (1) US3263777A (de)
BE (1) BE646524A (de)
CH (1) CH390793A (de)
ES (1) ES298898A1 (de)
GB (1) GB1061221A (de)
NL (1) NL6403464A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422963A (en) * 1967-05-22 1969-01-21 Mcneil Corp Safety suspension for cab of stacker crane
US3495725A (en) * 1966-09-19 1970-02-17 Miles Druce & Co Ltd Storage systems and forklift trucks for use therewith
US3631940A (en) * 1970-03-16 1972-01-04 Eaton Yale & Towne Load carriage with operator{3 s platform
US3661280A (en) * 1969-08-27 1972-05-09 Triax Co Automatic storage and semi-automated order picking system
US3907141A (en) * 1974-08-27 1975-09-23 Allis Chalmers Operator{3 s station optionally stationary or elevated
US3972434A (en) * 1974-12-23 1976-08-03 Allis-Chalmers Corporation Order picker with operator's platform on the front end of the load support
US4355703A (en) * 1979-03-08 1982-10-26 Clark Equipment Company Upright for lift truck
US4356891A (en) * 1979-03-08 1982-11-02 Clark Equipment Company Upright for lift truck
US20120205177A1 (en) * 2011-02-11 2012-08-16 Vincent Edward Jackson Golf cart safety apparatus
US20150344276A1 (en) * 2014-05-28 2015-12-03 Harlan Greenfield Wheelchair Accessible Forklift

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109748210B (zh) * 2017-11-02 2020-10-20 上海阿发渔具厂 组合型金属管支柱高空机器人

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496399A (en) * 1946-04-01 1950-02-07 Deere & Co Industrial truck
US2938595A (en) * 1957-10-11 1960-05-31 Norman H Miller Multiple lift

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496399A (en) * 1946-04-01 1950-02-07 Deere & Co Industrial truck
US2938595A (en) * 1957-10-11 1960-05-31 Norman H Miller Multiple lift

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495725A (en) * 1966-09-19 1970-02-17 Miles Druce & Co Ltd Storage systems and forklift trucks for use therewith
US3422963A (en) * 1967-05-22 1969-01-21 Mcneil Corp Safety suspension for cab of stacker crane
US3661280A (en) * 1969-08-27 1972-05-09 Triax Co Automatic storage and semi-automated order picking system
US3631940A (en) * 1970-03-16 1972-01-04 Eaton Yale & Towne Load carriage with operator{3 s platform
US3907141A (en) * 1974-08-27 1975-09-23 Allis Chalmers Operator{3 s station optionally stationary or elevated
FR2283086A1 (fr) * 1974-08-27 1976-03-26 Allis Chalmers Vehicule de levage
US3972434A (en) * 1974-12-23 1976-08-03 Allis-Chalmers Corporation Order picker with operator's platform on the front end of the load support
US4355703A (en) * 1979-03-08 1982-10-26 Clark Equipment Company Upright for lift truck
US4356891A (en) * 1979-03-08 1982-11-02 Clark Equipment Company Upright for lift truck
US20120205177A1 (en) * 2011-02-11 2012-08-16 Vincent Edward Jackson Golf cart safety apparatus
US8479865B2 (en) * 2011-02-11 2013-07-09 Vincent Edward Jackson Golf cart safety apparatus
US20150344276A1 (en) * 2014-05-28 2015-12-03 Harlan Greenfield Wheelchair Accessible Forklift
US10023447B2 (en) * 2014-05-28 2018-07-17 Harlan Greenfield Wheelchair accessible forklift

Also Published As

Publication number Publication date
ES298898A1 (es) 1964-10-16
GB1061221A (en) 1967-03-08
CH390793A (de) 1965-04-15
BE646524A (de) 1964-10-14
NL6403464A (de) 1964-10-20

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