Abstract: A tool and method provide a labor saving procedure for positioning the collars of screw jacks on base frames at desired heights at construction heights. A conventional electric motor driven drill is coupled to the screw jack pipe by the tool to rotate the pipes for positioning the collar at desired levels on the pipe.

Abstract: A jack assembly includes two lower arms each having an upper end portion and a lower end portion pivotally attached to a base, two upper arms each having an upper end portion pivotally mounted to a support bracket and a lower end portion pivotally mounted to the upper end portion of one of the two respective lower arms, a drive shaft having two end portions each rotatably extending through the connection of the lower end portion of one of the two respective upper arms and the upper end portion of one of the two respective lower arms, and an drive device including a drive gear train driven by a motor so as to rotate the drive shaft electrically, and a drive nut driven by a tool such as a socket so as to rotate the drive shaft manually. In such a manner, the jack assembly can be operated manually or electrically.

Abstract: A motorized jack for reducing the amount of labor needed to lift up a vehicle. The motorized jack includes a housing with a motor provided in the housing. A threaded shaft is also provided in the housing. A top end of the threaded shaft is upwardly extended through a hole in the top of the housing. A ring gear is disposed around the threaded shaft. The ring gear has a toothed inner perimeter engaging the threaded shafts. An interconnected set of gears is provided in the housing to connect the ring gear to a rotating shaft of the motor. A lifting head is coupled to the top end of the threaded shaft.

Abstract: A windshield jack includes a linear actuator operable between retracted and extended conditions. The actuator includes telescoping inner and outer tubes. A reversible drive motor connected to the outer tube includes a threaded drive shaft which engages a the inner tube, a base member for positioning on the front seat of a vehicle, and a windshield contact member to engage the windshield. Motor rotation in one direction moves the inner tube to extend the actuator. Motor rotation in the opposite direction moves the inner tube to retract the actuator. The base member may be a straight crossbar, a foot pad, or a bowed crossbar. The windshield contact member may be a crossbar, a suction cup, or a crossbar with suction cups along it.

Abstract: A vehicle mounted electromagnetic jack system attachable to a vehicle for lifting portions or all of a vehicle. The system includes four electromagnetically operated jacks, a main console located within the vehicle, which operates each jack selectively or all collectively for total lift. Each jack consists of a pair of electromagnets proportionately spaced wherein the lifting force is provided by the coupling intensity of the magnetic flux field propagated from each electromagnet, having confronting poles of like polarity, wherein the well-known repelling effect between like magnetic poles urges the poles apart to furnish the lifting force. Current controlled by the Control Panel, located within the vehicle, reverses the current to the Lower Electromagnet, causing a 180.degree.

Abstract: A lifting device for the controlled vertical movement of objects, especially such objects, to which is conveyed an electric current through a line, such as chandeliers, is described. It is especially characterized by the combination of a relatively longitudinal support, provided with a longitudinal guide. A threaded, preferably trapezoidally-threaded driving shaft journaled in the ends of support which shaft is driven by a motor via worm gear unit. A carriage guided by the longitudinal guide which carriage is movable in the longitudinal direction of support with a nut fastened to carriage, cooperating with the driving shaft. A shaft provided perpendicularly in support carrying a first ring gear and chain relatively heavy and stable to turning, running over first ring gear, chain being driven by carriage to change its position in relationship to support as the position of carriage is changed in relationship to support by driving shaft, chain carrying in a first end the object.

Abstract: A linear actuator comprising a hollow first cylindrical shaft with helical threads on its exterior surface and helical threads of opposite pitch on its interior surface and a second cylindrical shaft having an exterior surface with helical threads of the same pitch as on the interior surface of the first shaft and a motor for rotating the first shaft and relative to the second shaft end a base member. The second cylindrical shaft is coaxial with and adjacent the first shaft surface and its threads engage the threads of the first interior surface. Helical threads on the base member of the same pitch as the first shaft exterior surface threads are coaxial with and adjacent the first shaft exterior surface and engage the helical threads of the exterior surface of the first cylindrical shaft.

Abstract: An electrically driven car lift apparatus for use in a private garage is provided which operates on standard household electrical power. The lift apparatus is driven by two screws, one being directly connected to an electrical driving device with a transmission carrying rotational force to turn the second screw. The direct mounting of the electric drive device to the lift apparatus reduces the necessary area required to operate the lift apparatus and creates a convenient design for use in a typical space-restricted private home garage.

Abstract: An electric driving unit is provided with a bracket. A slide plate is mounted on the bracket for sliding movement in a direction perpendicular to an axis of an output shaft of the electric driving unit. A first pivot holder is secured to one of side walls of the slide plate. A second pivot holder is mounted on the other side wall such that the second pivot holder can be adjusted in an advancing and retracting manner with respect to the first pivot holder. The first and second pivot holders are arranged such that they can hold opposite ends of any pivot shaft for various jacks even if the length of the shaft is different. With this arrangement, it is possible to provide an electric power tool for driving a jack which can be used for various types of jacks having pivot shafts of different lengths.

Abstract: A two-speed linear actuator with high thrust and a high speed of translation for a machine, particularly a bending press. A linear actuator for a machine, particularly a bending press, having first and second bodies (2, 4) mounted for sliding relative to each other and a male-and-female screw mechanism (14) for controlling a relative sliding movement of the two bodies along a working line. The male screw (16) and the female screw (27) are supported for rotation by the first and second bodies (2, 4) and can be rotated by respective electric motors (24, 38). The motors (24, 38) are associated with respective speed-reduction devices (22, 26 and respectively 36) having substantially different reduction ratios. The actuator further includes a braking device (42, 44) associated with the member of the male-and-female screw mechanism (14) which is connected to the speed reduction device (22, 26) with the lower reduction ratio.

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 drive mechanism for a hospital bed effects relative vertical movement of a base and a patient litter. The drive mechanism includes spaced, telescoping threaded screw assemblies, which are driven by a single electric motor through a train of gears having helical teeth oriented to offset inherent frictional forces of the screw assemblies. A support for the motor and a component of the drive train are made of electrically nonconductive materials to electrically isolate the motor, and are arranged to damp vibrations produced by the motor. Two coiled electrical cords extend between the base and patient litter, and are each received in a recess in the patient litter when the patient litter is adjacent the base. A sensor arrangement provides an electrical signal indicative of the relative vertical positions of the patient litter and base, and a manual drive arrangement is provided to permit the gear train to be manually driven.

Abstract: A vehicle body or chassis is raised and lowered on an associated suspension coil spring by a device including a screw, a motor and motor controller, and a gear drive. The device enables adjustment of body or chassis height by the vehicle operator while the vehicle is in motion. Locknuts determine a limited range of adjustment. A particularly advantageous application is adjustment of race cars for specific conditions pertaining to a particular race track or race event. In a preferred embodiment, major components of the device are readily removable from the vehicle, enabling the vehicle to be adjusted prior to a race, then modified to meet, illustratively, NASCAR rules operative during the race.

Abstract: The present invention provides for the conversion of a manual-type ambulance cot to electromechanical usage. In a manual-type cot having a wheeled undercarriage, a cot frame, scissor-action collapsible legs and an extensible member associated with the undercarriage so that extension and retraction of the extensible member raises and lowers the cot frame, the improvement of the present invention includes a linear actuator attached to the extensible member and powered by a high energy density gelcel-type battery. Manual lifting of the cot frame is replaced by electromechanical raising and lowering so that lifting injuries may be avoided.

Abstract: An improved transfer system for patients is incorporated either with a tub enclosure or a mobile frame and includes telescoping tubes for lifting a patient chair and thus elevating the patient and lowering the patient into the tube enclousre. The lift system incorporates an improved coupling assembly for coupling the actuator for telescoping the inner tube within the fixed outer tube of the assembly.

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: An adaptor for a jack having a threadable jack shaft and a support platform that rises or lowers when the threadable jack shaft turns.The adaptor has a housing containing a drive motor that is coupled to a drive shaft. The adaptor has an engagement bracket for engaging releasably the adaptor to the jack. Spring loaded bolts bias the engagement bracket against the face of the housing. A jack and adaptor in combination and a method for operating a jack having support aligning bars wherethrough a threadable jack shaft rotatably passes to raise or lower a support platform of the jack upon rotation.

Abstract: This invention is directed to a mechanical means for moving a member such as a gate. The mechanical means comprises a screw which can be extended and can be retracted for moving and for rotating the member. There is a power means for rotating the screw and a control for the power means.

Abstract: Disclosed is a vehicle jack comprising a stand having an upper and a lower end and a lift arm having one end pivotably connected to the stand intermediate the upper and lower ends, the lift arm is moveable between a first position and a second position, and has a free end with a vehicle contact plate connected thereto. A lift arm drive assembly is connected between the stand and the lift arm and includes first and second housings and an elongate screw operative therebetween. The first housing is elongate and has an end pivotally connected to the lift arm between its ends and includes thread for operative cooperation with the screw. The second housing is pivotally connected to the upper end of the stand, the elongate screw having an axis and having one end rotatably but non-translationally connected to the second housing for rotation about the axis. The other end of the screw is threadably connected to the first housing.

Abstract: A portable automatic automobile jack includes an electrically powered automobile tire nut remover. The jack is powered through a cigarette lighter type plug by the automobile battery, and has an outlet for receipt and powering of a tire nut remover or other equipment. In another embodiment, the nut remover, powered by the auto battery, drives the jack.

Abstract: A housing having a telescopingly extendible and retractable leg is carried by the frame of a motorcycle. A camming mechanism which drives the leg is secured to a reversible motor through a limited torque coupling whereby the extension of the leg is automatically terminated upon firm contact with the ground. Switching circuitry provides that the motor is manually actuated by the operator of the vehicle.

Abstract: A tensioning device has a worm gear mounted in a hollow section enabling the longitudinal displacement of a lift member with respect to a hollow section. The hollow section base and the lift member in each case carry a joint bolt, which cooperates with joint heads fixed to the adjustment means. The worm gear permits a very sensitive and exact setting of the spacing between the two joint bolts, which remains unchanged over a long period. In addition, the tensioning device is particularly suitable for orthopedic purposes, due to its small constructional volume.

Abstract: The invention relates to motor driven scissors jacks for automobiles and is driven by the electric power source from the cigarette lighting socket of any automobile. Its DC motor is driven through a deceleration gear box for rotating a screw rod clockwise or counter-clockwise in order to provide for the raising of the frames of scissors jacks with automatic raising of vehicles and for the higher raising and lower collapsing functions and a more powerful raising capability. It is also provided with one ultimate switch for peak and low bottom points in order to limit its raising and collapsing operation to fixed points and an automatic stop for safe raising operations and for preventing damage to the motor.

Abstract: A load bearing, one-way, spring clutch assembly for use in a load bearing assembly where the load bearing assembly includes a housing, a shaft rotatably mounted to the housing, a drive for applying a first torsion load to the shaft, and a thrust load applying a second torsion load to the shaft in a direction opposite the first torsion load. The load bearing, one-way, spring clutch assembly has first and second clutch members, one of the clutch members secured to the shaft for rotation therewith, and the other clutch member mounted on the shaft for rotation about a common axis with the one clutch member. Thrust load bearings are between the clutch members for carrying the thrust load. A spring clutch allows rotation of the one clutch member relative to the other where the first torsion load is greater than the second torsion load, and locks the clutch members together so that the one clutch member cannot rotate relative to the other where the second torsion load is greater than the first torsion load.

Abstract: An electromechanically reciprocable load has a driving spring tending to displace it from a retracted position into a working position upon the release of a locking brake. The spring force is opposed by the countervailing force of an electric motor which, during the working stroke, is progressively reduced in keeping with the diminishing force of the relaxing spring. When the load includes a caliper of a power brake arresting a rotary element in its working positon, the motor is controlled by a bridge circuit with two potentiometers whose wipers are entrained, with a relative lag, by the load so as to establish a variable null position advancing with progressive wear of the brake linings in order to keep constant the travel of the load during a return stroke brought about by the energization of the electric motor with an overriding signal.