Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7008167 | Fork positioner for facilitating replacement of forks on lift trucks A fork positioner for a forklift truck has power-actuated yokes, each having a base from which a pair of transversely spaced legs depend, for engaging respective load lifting forks and adjusting their spacing transversely along a fork-supporting member. Each of the ... | 03/07/2006 |
| 6672823 | Fork positioner for facilitating replacement of forks on lift trucks A fork positioner for a forklift truck has power-actuated yokes, each having a base from which a pair of transversely spaced legs depend, for engaging respective load lifting forks and adjusting their spacing transversely along a fork-supporting member. E... | 01/06/2004 |
| 6533526 | Fork lift rack displacement device This invention relates to a displacement device mountable on a fork lift rack for allowing displacement of a lift member in a substantially vertical direction. The displacement device has a body with at least one elongated opening having its longitudinal ... | 03/18/2003 |
| 6241454 | Lift truck vehicle, with a positioning means A lift truck vehicle (F) with a lift device (4) which comprises a positioning device (6) which is inclined with respect to the vertical. The positioning device (6) serves the setting up of the carrier fork (5) (or related device) independently of the lift... | 06/05/2001 |
| 6065926 | Adjustable fork tractor system An adjustable fork tractor system is disclosed. The system includes a pair of adjustable forks having remote ends and having near ends with vertical support bars having lower ends attached to the forks adjacent to the near ends and having upper ends with ... | 05/23/2000 |
| 6027303 | Non-counterweighted lift truck and method of operation A lift truck, especially for lifting boats, includes a self-propelled main frame having a pair of parallel rails extending in a fore-and-aft direction. The main frame is supported by front drive wheels and rear castor wheels. A mast is movable forwardly a... | 02/22/2000 |
| 6022182 | Two directional industrial sidelift truck with rotatable cab A sidelift truck, comprising: a main body (3) providing a load platform (5); a lifting assembly (7) for handling loads to and from the load platform (5); and a cab (9) mounted to the main body (3) and rotatable about a substantially vertical axis (X).... | 02/08/2000 |
| 5807060 | Forklift truck side shifter A removable side shifter attachment attachable to the carriage bar of a lift truck has a frame shiftable with respect to the truck. The frame includes a shifter carriage bar for receiving a lift fork. A hydraulic cylinder attached to the truck carriage ba... | 09/15/1998 |
| 5707201 | Forklift truck side shifter A removable side shifter attachment attachable to the carriage bar of a lift truck has a frame shiftable with respect to the truck. The frame includes a shifter carriage bar for receiving a lift fork. A hydraulic cylinder attached to the truck carriage ba... | 01/13/1998 |
| 5688102 | Tree moving and planting apparatus A hydraulic lift attachment is connected to the lift arms of a loading vehicle, and includes a base plate with a pair of brackets thereon for pivotal attachment to the lift arms of the loading vehicle. A first jaw member is rigidly connected to the base p... | 11/18/1997 |
| 5374156 | Carriage assembly and side shift system for a lift truck A carriage assembly, 20h for a lift truck upright assembly, 12, has pivotally mounted forks, 30, controlled by hydraulic cylinders, 36, that are operated by side shifter circuit, 110, having a single operator control, 124, for manipulating the forks in un... | 12/20/1994 |
| 5326217 | Lift truck with negative drop upright A lift truck includes an upright assembly having first, second and third telescoping mast sections. Each mast section is formed from pairs of laterally spaced and interconnected I-beam rails. A carriage assembly is mounted for movement along a path on the... | 07/05/1994 |
| 5280715 | Lifting arrangement and method A lifting frame assembly having first and second spaced hooking members adjustably carried on a second portion of the lifting frame assembly is connectable to work tools of different sizes. The lifting frame assembly is connected to a lifting device by a ... | 01/25/1994 |
| 5190436 | Carriage assembly having side shiftable and adjustable forks A carriage assembly has a frame and a carrier movably connected to the frame. First and a second forks are slidably mounted on the frame and movable in transverse directions along the frame. First and a second jacks are connected to and between the first ... | 03/02/1993 |
| 5154568 | Side loading apparatus A lifting assembly for lifting containers onto rail cars includes a substantially rectangular horizontal frame slidably mounted on vertical hoist assemblies each supported on a tracked undercarriage. The lateral separation between the hoists and the later... | 10/13/1992 |
| 5147171 | Side shift carriage for a lift mast A side shiftable carriage assembly has a carriage frame and a side shift frame. A bracket arrangement connects the side shift frame to the carriage frame for slidable movement in directions transverse uprights of a lift mast. The bracket arrangement has s... | 09/15/1992 |
| 5096363 | Multiple-pair fork positioner A lift truck fork positioner for respective inner and outer pairs of load-handling forks includes power actuators for selectively extending and retracting the outer pair of forks and latch assemblies for selectively detachably connecting an inner fork fix... | 03/17/1992 |
| 5033934 | Fork unit for lift trucks A fork unit mountable on the fixed front plate member of a lift truck comprises a movable frame to which the forks of the fork unit are restrained by respective shanks lying in the same plane that contains the frame. Between the upper and lower edges of t... | 07/23/1991 |
| 4960357 | Mobile fork lifting apparatus A mobile lifting apparatus, such as a fork truck or a fork lift, comprises a fork carriage vertically displaceable along guides in a mast, the fork carriage comprising two parallel, horizontal transverse girders. The two transverse girders guide and suppo... | 10/02/1990 |
| 4941786 | Excavator An excavator has a frame attached to its rear side for mounting of an implement. The frame includes lateral limit vertical beams which are connected by upper and lower horizontal rails. The rails are separated vertically. A slide member has guide grooves ... | 07/17/1990 |
| 4902190 | Fork positioning attachment for lift trucks A fork positioner is mounted on a side-shifting carriage of a forklift truck and has transversely-movable, powered yoke assemblies for detachably engaging the upstanding portions of the forks and selectively moving them transversely toward and away from e... | 02/20/1990 |
| 4756661 | Motorized operator unit for manually adjustable fork mechanism A motorized operator unit which is readily attachable to a conventional manually adjustable fork mechanism for adjustment of the forks by operation of a motor. The operator unit comprises support structure which supports a pair of elongate threaded rods. ... | 07/12/1988 |
| 4752179 | Push-pull load handler for forklift truck A push-pull slipsheet handler for a forklift truck is capable of utilizing the truck's standard forks for load-supporting purposes, while enabling mounting and demounting of the push-pull assembly and forks in unison with respect to the lift truck carriag... | 06/21/1988 |
| 4718814 | Forklift variable reach mechanism A mechanism for use on a boom-type vehicle includes load lifting forks carried by a low profile twist-resistant carriage which is one link in a low profile parallelogram linkage attached to a fly section of the boom and maintained level in all positions o... | 01/12/1988 |
| 4688982 | Motorized operator unit for manually adjustable fork mechanism A motorized operator unit which is readily attachable to a conventional manually adjustable fork mechanism for adjustment of the forks by operation of a motor. The operator unit comprises support structure which supports a pair of elongate threaded rods. ... | 08/25/1987 |
| 4668154 | Attachment apparatus for crane or the like An attachment apparatus is arranged to be suspended from an overhead travelling crane or other similar means and is employed for a cargo handling operation, for example, unloading an article placed on a shelf or rack. The attachment apparatus includes a f... | 05/26/1987 |
| 4632630 | Forklift attachment A fork extension attachment for a boom-type forklift for use in loading and unloading a fragile cargo from commercial containers includes an extension portion pivotally connected to the outer end of the boom to allow pivotal movement of the extension in a... | 12/30/1986 |
| 4607997 | Side shifting attachment for fork lift trucks A side shifting attachment for a fork lift truck having an upper shift bar and a lower shift bar for allowing transversal shifting movement of the attachment having load handling fork tines. The upper shift bar is engaged with an upper finger bar held by ... | 08/26/1986 |
| 4533290 | Fork-lift attachment with four laterally displaceable prongs An attachment for a fork-lift truck has a vertical support plate, secured to an adjacent lifting plate of the truck and laterally shiftable therealong by a fluidic jack, which is provided with two pairs of vertically spaced, horizontal guide rails slidabl... | 08/06/1985 |
| 4505635 | Load lifting unit for a lift truck The present invention relates to a load lifting unit for a lift truck, and more particularly, a load lifting unit for a counterbalance type lift truck. In the invention, to increase the loading capacity and longitudinal stability of the lift truck as well... | 03/19/1985 |
| 4488422 | Method of making forks for fork lift trucks There is disclosed a method of making a fork for a fork lift vehicle, which fork is formed with an integral head, created by forging the same, into a hooked shape form, the rest of the fork being of generally conventional configuration, the fork further i... | 12/18/1984 |
| 4392772 | Load lifting carriage having side shift adjustable forks A load lifting carriage (12) has horizontal rails (24, 26), vertical side members (28, 30), forks (16, 18) slidably supported on the rails (24, 26), cylinders (32, 34) having outer jackets (36, 40) connected to the vertical members (16, 18) and cylinder r... | 07/12/1983 |
| 4360309 | Hydraulic cylinder with spherical bearing mount A hydraulic cylinder mount assembly (50) for a cylinder (42) having first and second ends (52,64) includes a spherical load bearing surface (96) located at one of said first and second ends (52,64), which has a diameter (98) which is less than the diamete... | 11/23/1982 |
| 4280781 | Fork-lift truck having means for regulating the horizontal distance between the tines and for laterally displacing the tines A truck of the kind provided with tines by which goods can be lifted and conveyed is provided, in which the tines are arranged to co-act with apparatus for regulating the horizontal distance therebetween. The apparatus comprises a screw-threaded spindle w... | 07/28/1981 |
| 4279564 | Parallel arm clamp having improved attaching assembly for narrow clamp arms A parallel arm clamp assembly having longitudinally-movable elongate slide members mountable transversely on the front of a lift truck and attaching members for connecting relatively narrow opposing clamp arms to the ends of the slide members so as to ext... | 07/21/1981 |
| 4221535 | Latch for lift truck fork There is disclosed latching instrumentalities or structure for the forks of fork lift trucks which involves forming the head of a fork with a recess, a strap member of resilient construction having a detent formed thereon to engage a notch on a fork lift ... | 09/09/1980 |
| 4185944 | Slide structure for parallel arm clamps and the like A slide structure for lift truck mounted parallel arm clamps, fork positioners and the like. A slide guide frame adapted to be mounted on the load carriage of the lift truck carries a plurality of elongate, transversely movable horizontal slide members fo... | 01/29/1980 |
| 4183710 | Paper roll transporter A transporter for moving large cylindrical loads, such as paper rolls 8 feet in diameter and 8 feet long. A U-shaped frame with spaced arms carrying air bearings, an on board compressor for a self contained air supply, and a drive unit which can be couple... | 01/15/1980 |
| 4125199 | Lateral-shift device for fork-lift vehicles A lateral-shift device for the prongs of a fork-lift vehicle in which the fork carrier and prong-support device is laterally shiftable by a mechanism at least in part recessed in the front face of the carrier on which the fork is vertically displaceable s... | 11/14/1978 |
