Abstract: A two-piece handle for use in positioning a vehicle lifting jack beneath a vehicle and rotating a spindle of that jack. The two-piece jack handle includes a jack handle rod having one end for engaging the jack spindle and a sleeve secured to an opposite end. The sleeve has a cavity configured to receive in driving engagement one end of the jack handle rod extension. A clip slidably mounted on the first end of the jack handle rod extension is slidable over the coupling and releasably connectable to the jack handle rod to releasably secure the jack handle rod and jack handle rod extension in coaxial alignment.

Abstract: A lifting system for moving mobile homes that includes wheeled jack assemblies, jack units assembled from such assemblies and a segmented track for supporting such assemblies and units. Each jack assembly preferably includes a jack rollingly carried on wheels, and a roller head operatively connected to the working end of the jack to move from a lowered position to a raised position. The wheels allow lateral adjustment of the home, while the roller head allows longitudinal adjustment of the home. In the preferred embodiment, each jack unit includes two jack assemblies, with one of the assemblies further including a drive motor operatively connected to its wheels. Furthermore, the assemblies are interconnected by a hydraulic power unit in the form of a housing that encloses and protects the hydraulics for controlling each jack and drive motor. Each segment in the segmented track generally includes a pair of rails structurally interconnected, with a hole formed adjacent each end of the segment.

Abstract: A drill attachment for transferring torque from a rotary power tool to a jack of a trailer. The drill attachment includes a sleeve portion that fits over and is connectable to the rotatable drive shaft of the trailer jack. The drill attachment includes a chuckable end for attachment to the rotary power tool. It is an advantage that the drill attachment provides an automatic and economic way to raise and lower trailer jacks. The drill attachment also provides for a power tool which is interchangeable among several different trailer jacks.

Abstract: A two-piece handle for use in positioning a vehicle lifting jack beneath a vehicle and for rotating a spindle of that jack, which handle comprises a jack handle rod, a jack handle rod extension, and a jack handle coupling for releasably interconnecting the jack handle rod and the jack handle rod extension in co-axial alignment. The jack handle coupling comprises a sleeve mounted over and fixedly secured to a knuckle joint of the jack handle rod and adapted to receive a knuckle joint of the jack handle rod extension. A spring wire engageable with the knuckle joint of the jack handle rod extension secures the two pieces of the rod in coupled engagement. Preferably, the knuckle joints of both sections of the jack handle are formed by bending the ends of the rods 180.degree. into a J-shaped configuration shaped to be permanently secured to the knuckle joint of one of the rods and to slidably receive the knuckle joint of the other rod.

Abstract: A post/stake removing tool with at least two base support angles from the ground for the fulcrum lever to pull on the post/stake near or at the angle the post/stake are inserted. The fulcrum is pivotably attached to the support and the jaw is pivotably attached to the lever arm. The jaw is a diamond shaped aperture for grabbing the post/stake in four places. A fulcrum/lever is also used to remove heavy or stuck manhole covers. A combination hook and jack lifting head apparatus is attached to the lever arm for manual use or for lifting with a jack.

Abstract: A jack handle and adapter bar are shown which permit conventional automotive hydraulic floor jacks to be used to jack up low clearance cars. Full control is obtained without damage to or interference from the car skirt or fairing panels.

Abstract: A lock structure which automatically locks the screw drive upon deactivation of the screw drive and automatically unlocks the screw drive upon activation of the screw drive. The locking structure is responsive to the attaching and detaching of a driver such that the detaching of the driver from an input of the screw drive automatically locks the screw drive and attaching the driver to the input of the screw drive automatically unlocks the screw drive. This is achieved by providing an outer locking surface on the screw drive and a locking plate whose axial position is controlled by the position of the drive and having an aperture for mating with the outer locking surface and locking the screw drive.

Abstract: A hand/foot dual operated lever mechanism for hydraulic jacks includes a short lever-type foot pedal that can be operated by a movable base of a longer lever and that operates a plunger of a pump. A bolt or shaft extends through the foot pedal and the movable base and a side plate of a hydraulic jack. A hidden spring retracts the foot pedal up so that the plunger of the pump can generate a pumping action to lift lifting arm linkages.

Abstract: A manually-operable railroad switch stand for causing movement of railroad switch points between two extreme operating positions is provided with a crank assembly that is connected to the switch stand input shaft for joint rotation and that has a pair of parallel and substantially laterally spaced-apart handle pull-push segments which are each of sufficient length to alternatively accommodate an operator's hand or an operator's foot and which each may be selectively hand-grasped or foot-engaged by the switch stand operator without having to significantly bend his/her spinal column at the waist when manually causing movement of the switch points between the switch extreme operating positions thus avoiding possible costly operator spinal injury.

Abstract: A foldable jack system for lifting a car during the changing of a tire comprising a lower support bar formed of separable halves, each half having an intermediate end with hinge attachments formed of spaced holes mutually alignable to receive a bolt for coupling the halves, each half having a support block at its exterior end with a vertical recess at its upper end and a support plate at its lower end; an upper support bar formed of separable halves, each half having an interior end with a hinge attachment formed of spaced holes mutually alignable to receive a bolt for coupling the halves, each half having a jack block at its exterior end with a vertical aperture extending therethrough; a hook extension secured to each half of the upper support bar; a pair of rigid bars, each rigid bar having a lower end received in the recess of its associated support block and a series of teeth facing in a common direction; activating mechanisms including a jack crank for each jack block for raising and lowering the jack bl

Abstract: A jack handle which limits the torque that can be applied to a jack so as to prevent overload and injury. The jack handle has a reduced cross-sectional portion between the handle and the jack engaging portion so that the handle will break off at the reduced cross-sectional portion, thus, preventing overloading of the jack. A portion of the handle which does not break off is provided with a jack engaging portion so that the broken portion of the jack can be removed and the second jack engaging portion can be inserted into the jack to lower it.

Abstract: An improved drive unit for a jack mechanism which is formed from an inexpensive stamping and it can be attached to the control shaft of a jack by staking, welding or other matter and which can be bent into a shape which has an opening to receive a flatted handle for operating the jack and which also has manual extensions which can be used to manually lower and raise the jack.

Abstract: A jack (11) is provided with a thumb wheel (10) preferably made of a plastic material. The jack (11) includes a side gear having an end (20) extending out of a side gear housing (18). The housing (18) has an outer peripheral lip (19) which is engaged by the thumb wheel (10). The thumb wheel (10) includes a plate (24) having an aperture (26) therein of a configuration complementary to that of the side gear end (20) so that when the thumb wheel (10) is positioned on the jack (11), the side gear end (20) will be within the aperture (26) and will rotate upon rotation of the plate (24). The thumb wheel (10) also includes a collar (30) having a plurality of slots (33) therein and a circumferential barb (31) near the end thereof. Upon installing the thumb wheel (10), the collar (30) flexes and the barb (31) snaps over and engages the lip (19) on the housing (18). The engagement is only in the axial direction such that the thumb wheel (10) will freely rotate with respect to the housing (18).

Abstract: A motorized jack assemblage for vehicles. This takes the form of a kit containing a motor and reduction gear linkage adapted to be energized from the cigarette lighter or other source of electrical power in the vehicle. The gear linkage is adapted to drive mechanical coupling means, which keys into and operates a lift jack, which in one case is part of the standard equipment for the vehicle, and in another case is a jack with a specialized base which is part of the kit.

Abstract: A drive head for the screw of a scissors jack which is formed in the shape of a wing nut which has a hexagonal socket formed between opposed walls so that a conventional folding lug wrench can be used by inserting its hex tube into the hexagonal socket to drive it. In the event of overload, the lug wrench will slip relative to the wing nut so as to prevent excessive loads and stresses upon the jack.

Abstract: A safety latch for the hydraulic power release mechanism on a low-slung, floor-mounted portable hydraulic lifting jack of the type operated by an elongated handle that is pumped back and forth in order to raise a lifting arm, and which handle may be twisted about its longitudinal axis to release hydraulic pressure and lower the lifting arm, is disclosed. The safety latch will releasably hold the handle against twisting.

Abstract: A pump lever for a jack is disclosed which comprises a protrusion formed near a plunger of a fluid pump for the jack; a handle sleeve having a first end and a second end, the first end being adapted to receive a handle and the second end being pivotally joined at said protrusion by a first pin, and in addition, a certain position between the first and second ends of the handle sleeve being pivotally joined with the plunger by a second pin; and a torsion spring having a pair of counteraction portions and a loop portion shaped between said pair of counteraction portions, the loop portion being passed through and supported by the first pin, and the pair of counteraction portions being adapted to respectively make contact with the protrusion and the second pin so that the torsion spring will urge the handle sleeve to raise to its uppermost position when one frees the handle, the top end of which is received in the first end of the handle sleeve at a lowered position.

Abstract: A safety tie down bar (10) is provided with a handle grip and a protection system (30) for use with a ratcheting winch type tightening device. The safety tie down bar (10) includes a longitudinally extended handle member (20) having a linearly directed section (21) and an angularly directed section (23). Each of sections (21) and (23) includes a ratchet end portion (22) and (24) respectively. Hand grip and protection system (30) includes a plurality of annular sleeves (32, 34 and 36) longitudinally displaced each from the other along handle member (20). First annular sleeve (32) functions alternately as either a hand grip member, when ratchet end portion (24) is inserted within the ratcheting device, or as a means for limiting the insertion depth of ratchet end portion (22).

Abstract: A lever connecting mechanism for a horizontal hydraulic jack with tension rod comprises a vertical pumping rod having a traversed U-shape connecting member fixed thereon for receiving a bar provided on a foot pedal which is pivotally connected to the structure of the hydraulic jack, and a lever member pivotally connected to the structure of the hydraulic jack. The lever member has the same axis of rotation as the one of the foot pedal so that said lever member can be used to drive said foot pedal toward a downward direction. Since the foot pedal and the lever member are individually supported by two springs at their upmost position, the foot pedal can be depressed without affecting the lever member, but however, the downward movement of lever member will cause the foot pedal being depressed also.

Abstract: A hydraulic jack system used for lifting and lowering heavy loads such as machine tools comprises a lower cylindrical member, a solid ram member mounted within the cylindrical member and an outer sleeve member having affixed thereto a lifting slab and fitting over the lower cylindrical member. A hydraulic injection hose forces fluid into the lower cylindrical tube causing the ram member to rise and thus lift the outer sleeve member and the flange on which the load rests. The hydraulic injection hose has an adjustable valve which allows not only for injecting fluid at a rate to raise the ram member and thus the load as quickly as desired, but also allows fluid to flow back through the fluid injection hose at a desired rate such as to lower the load through the force of gravity as quickly as desired.

Abstract: A lifting jack for campers or similar structures. The jack includes a base with extensible tubes and a hand crank for raising and lowering one of the tubes to a desired height. The hand crank includes a handle which slips over a rotatable shaft and serves to rotate the shaft and raise or lower the tube. The handle also defines a hex bore for tightening the hex nuts associated with the jack mounting bracket.

Abstract: A vehicle lifting jack of the actuating screw type is provided with an integral stowable crank. The crank comprises an L-shaped member pivotally connected to a crank handle. These elements are foldable together and may be swung over the lifting jack for storage. These elements are unfoldable for cranking the actuating screw to raise and lower the vehicle lifting jack. When unfolded, the crank is adjustable to a cranking position wherein the cranking element is in substantial alignment with the actuating screw to facilitate cranking.

Abstract: A combination of a hydraulic jack with a triangulated steel stand interlocked with a novel, key-secured, ribbed cylinder of high strength light weight alloy, thread-connected to the lifting ram of the jack. Fast finder funnels are enjoined for rapid setting and operating of the combination with a handle having a 90.degree. bend at one extremity and a hinged center engaged by a spring released sleeve restrainer.

Abstract: A lifting jack is disclosed which is operated by a handle which is pumped up and down in order to lift a lifting platform on which is supported a load. A locking device is provided which, when the handle is pivoted into the fully upright position, automatically locks the handle upright; and which can be released by a simple blow from the foot of the operator.

Abstract: An adjustable lift link on a three-point hitch having a self-locking handle and retainer for selectively adjusting and holding the adjustment of the lift link. A stop on the link selectively provides the float or fixed length positions of the link of the three-point hitch.

Abstract: An improvement in patient lifting devices comprising an upright member, a boom pivotably mounted on the upright member, a fluid cylinder pivotably mounted between the upright member and the boom, and a manually operated pump for the fluid cylinder. The improvement comprises means actuated by the pump handle for transferring fluid from the fluid cylinder to a fluid reservoir, thereby permitting the boom to lower under the combined weight of the boom itself and anyone being carried by the boom.

Abstract: Presented is a hydraulic jack structure having a pump assembly in connection with which is rotatably mounted a pump handle assembly which may be rotated in a horizontal plane through about 320.degree. to permit selective positioning of the handle during a pumping operation.