Abstract: In a pantagraph type jack, a pair of side plate portions are provided at an upper end of each lower arm, and a pair of side plate portions are provided at a lower end of each upper arm, the pairs of side plate portions being superposed on each other. Outer one of the side plate portions has an insertion hole provided therein, and inner one of the side plate portions has a support sleeve portion formed thereon by burring and coaxially connected to the insertion hole and extending inwardly. The connecting shaft is formed with its outside diameter uniform over the entire axial length, and has bulged portions formed by caulking at its opposite ends inserted through the insertion holes and the support sleeve portions, which bulged portions are engaged with the outer side plate portions. In a Y-type jack, a pair of opposed side plate portions are provided at an upper end of a lower arm. A supporting sleeve portion is formed on the side plate portion by burring to extend inwardly.

Abstract: One piece load rest having reinforcing portions folded under the centre, fabricating and depending leg portions to be connected to the upper portion of a jack.

Abstract: A safety vehicle lift comprising a unitary base of a flat rigid construction having parallel side edges and having parallel front and rear edges; a lifting assembly comprising a lower portion secured to the base between the side edges and adjacent to the rear edge, the lifting assembly also including a support platform positionable above the lower platform with crossed-linkage elements coupling the support platform and the lower platform in a scissor-like configuration, the linkage elements having pivotable ends secured to the lower portion and the support platform adjacent to the rearward end and axially shiftable ends secured for parallel movement within the lower portion and the support platform; drive mechanisms operatively coupled to the linkage mechanisms to effect the raising and lowering of the support platform while maintaining its parallelism with the lower portion; and a ramp having a lower end at the front edge of the base and a raised end at an intermediate portion of the base between the front e

Abstract: A rope jack for a shuttle system comprises: a rope holder (8) that holds a rope (1) which travels over guide wheels (6) to move a floating shuttle; a catch holder (9) which is attached to be attachable and detachable on a guide rail post (5); and, a jack unit (10) which presses against the rope holder (8) to move the rope holder away from the catch holder (9). The guide wheel (6) is released from the pressure of the rope (1) and can be easily replaced with a new one.

Abstract: A vehicle raising jack has an arm with a stirrup, at least one flat front support portion, at least one arm to which the jack foot is pivotally connected and a nut in which the jack screw is threaded. The jack has an automatic stabilizing and reinforcing structure including a convex member, rotatably retained and supported on a transverse rod attached to the arm by a hook and by respective end flanges. The stirrup is pivotally supported on the convex member and carries a center plate member, located in front of the stirrup and under the flat front support portion thereof. The stirrup is provided with a downwardly projecting flap attached to the bottom of the plate member, in which there is mounted a spring attached at the other end thereof to the arm and holding the stirrup centered.

Abstract: A flexible protective bellows or boot for the lead screw of a scissors jack which serves as a reservoir for grease and lubricant and which fits over the lead screw to lubricate it and also to protect the user of the jack from getting greasy. The flexible boot makes it feasible to store the jack in locations outside the trunk of the vehicle.

Abstract: In a pantograph jack an improvement comprising an extended tube mounted in a joint of the pantograph to extend a threaded annulus towards a shortened screw of the jack in which the extended tube has an integral construction and is positioned in the joint by crimping of tabs about trunnion pins in the joint.

Abstract: An electric jack of the type used in robotics having a rotation-translation movement transformation system, at least one electric motor connected to the movement transformation system, means for controlling the electric motor for driving the movement transformation system with acceleration and deceleration phases and energy recovery means for recovering electrical energy generated by the electric motor during deceleration phases. The movement transformation system has a rotation part and a translation part and is mechanically reversible such that, during deceleration phases, the translation part is capable of driving the rotation part with substantially identical efficiency as the rotation part drives the translation part during acceleration phases. During deceleration phases, the kinetic energy of the translation part causes the electric motor to generate energy which is recovered and stored in an energy recovery system utilizing a capacitor and a diode.

Abstract: Jack with an upright (1) that rests on a base (8 or 19). An arm (3) that pivots around a horizontal axis (r) on the upright. The arm has a load accommodation (4) on its free end and engaging the bottom of the vehicle. The arm can be pivoted to various levels directly or by way of levers and transmissions attached to it and to the upright by a manually controlled mechanism, specifically a threaded shaft (5). A brace (15) is attached to the upright and rests flat against the ground or floor (11) at the end of the base facing away from the vehicle while the jack is in the initial-introduction position. The brace is a tab rigidly attached to the upright (1).

Abstract: An integral plastic load rest for a pantograph jack having a laterally extending channel to engage a vehicle and a reinforced seat centrally positioned under the channel to transfer vehicle load to the jack while allowing clearance for the jack teeth.

Abstract: An improved scissors jack which has a lead screw that does not extend beyond the confines of the jack when the jack is in the partially raised position so as to reduce the space required for storing the jack. A hollow member is formed with a slot in which the extension of the threaded screw is received so that the end of the screw can slide in the slot when the jack is in the unloaded position to allow the jack to be raised to a mid height condition for storage. Under use, the extending portion of the screw moves to the end of the slot in the hollow member so as to apply tension to the lead screw to thus raise and lower the jack as the lead screw is rotated.A modified form of the invention utilizes an extended hollow trunion which prevents the end of the lead screw from extending beyond the confines of the trunion and a further modification provides for pivotally connecting two portions of the lead screw so that the jack can be moved to a stored condition.

Abstract: Hollow trunnions for a scissors type jack which allows a lighter jack to be produced. The hollow trunnion may be formed into a hollow tube and welded and formed with openings for the lead screw. The hollow trunnion may also be formed from solid tubing. A flatted portion may be formed on the trunnion to provide a bearing surface. A modification provides a U-shaped bracket which attaches to the hollow trunnion and which carries a nut through which the screw extends.

Abstract: A pantograph jack is disclosed having a drive screw having a length required to span a distance between a threaded annulus at a first joint and a second joint, the improvement comprising an extension means to extend the threaded annulus towards the second joint to shorten the said distance and the length required of the drive screw.

Abstract: First and second sliding bodies are guided along a first axis on linear guide rails. A linkage connects a table to the first and second sliding bodies. The linkage moves the table parallel to the linear guide rails when the first and second sliding bodies are displaced the same distance. The linkage moves the table perpendicular to the linear guide rails when one of the sliding bodies is moved a different distance from the first sliding body. The perpendicular distance can be either the Z axis or the Y axis.

Abstract: A lifting apparatus (30) configured with independent lifting means at opposite ends of the longitudinal axis of a base (40) is provided. Slidable transverse support combined with an ability of the lifting means to tilt longitudinally causes the apparatus to be particularly suitable for lifting two wheeled vehicles such as a motorcycle (20). One embodiment (200) uses resilient pads between the lifting means and the base to facilitate tilting. Another embodiment (300) is directed to rigid lifting means.

Abstract: An improved scissors jack which has a lead screw that does not extend beyond the confines of the jack when the jack is in the partially raised position so as to reduce the space required for storing the jack. A hollow member is formed with a slot in which the extension of the threaded screw is received so that the end of the screw can slide in the slot when the jack is in the unloaded position to allow the jack to be raised to a mid height condition for storage. Under use, the extending portion of the screw moves to the end of the slot in the hollow member so as to apply tension to the lead screw to thus raise and lower the jack as the lead screw is rotated.A modified form of the invention utilizes an extended hollow trunion which prevents the end of the lead screw from extending beyond the confines of the trunion and a further modification provides for pivotally connecting two portions of the lead screw so that the jack can be moved to a stored condition.

Abstract: An improved open end construction for jacks which provides for tabs which extend at right angles to the side surfaces of the channel members so as to allow pivot pins to be received in the open ends after which the tabs are bent so that they lie in the plane of the side surfaces of the channel members so as to lock the pivot pin in the ends of the channel assembly. Also, partial flanges can be formed about the openings in the ends of the channel members so as to provide bearing surfaces for the pivot pins.

Abstract: An automotive jack in which an upright leg is provided with a U-shaped cross-section and has a foot connected to an end of that leg. A supporting arm is connected to the leg at a pivot with a horizontal axis, whereby the supporting arm is pivotable about the horizontal axis. The jack is actuated through a thread and nut device which is pivotally connected to the leg and the supporting arm. The U-shaped cross-section of the leg has an open end and two sides connected by a convex base portion in the cross-section of the leg and throughout substantially the length of the leg when viewed from outside the leg.

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: A multifunctional power driven positioning tool system wherein a battery powered screw driven removable central unit may be fitted into equipment to function as a tool for prying apart objects, for lifting or lowering within adjustable calibrated distances, for powering a material handling unit and for use in a press frame for pressing and pulling bearings.

Abstract: A plastic pantograph jack for use in lifting and lowering automobiles comprising arms jointed together between a base and a load rest having a threaded rod passing through a pair of joints of the plastic members to raise or lower the load rest with respect to the base.

Abstract: A jack with a foot resting on the ground and with a supporting plate that rises away from the foot, lifts the vehicle, and pivots around one or more articulations on a supporting component around an axis paralleling the length of the vehicle. The object is to make it possible to compensate for tilting along the vehicle without causing unilateral stress that could damage the bottom of the vehicle with local pressure. The jack accordingly has at least one support (17) on or between the articulations (15 and 16) and between the supporting plate (8) and the supporting component (3), and the articulations allow a limited pitch paralleling the length of the vehicle on the part of the plate.

Abstract: Scissors jacks which are provided with channels which bend during overload conditions so as to indicate to the user that the jack has been overloaded. One embodiment an accordion structure is used and in the other two embodiments metal straps are used.

Abstract: An automotive jack in which an upright member is provided with a pivotable base plate hinged on a first pivot at the bottom of the upright member. This upright member has a second pivot on which a supporting arm is turnable. The supporting arm is pivoted by an actuating device. A spring pivots the base plate along the length of the upright member, and the supporting arm has, at one end, a load interception head for pivoting the base plate through a stop against the force of the spring into a position at an angle to the length of the upright member when the jack is folded together. The sole of the base plate has an entire surface butting against the ground for any extensions and loads of the jack due to the pivoting of the base plate about the first pivot.

Abstract: A lifting apparatus (30) configured with independent lifting means at opposite ends of the longitudinal axis of a base (40) is provided. Slidable transverse support combined with an ability of the lifting means to tilt longitudinally causes the apparatus to be particularly suitable for lifting two wheeled vehicles such as a motorcycle (20).

Abstract: A jack (1) has a flat base (2) attached to a support (3) at the top by a lever-operated mechanism. The mechanism is activated by a threaded shaft (5) and nut (6). The nut has a coaxial gudgeon (10 & 11) on each side. The gudgeons extend across the axis (22) of an interior-threaded section. The nut consists of two halves (13 & 14). The halves fit together at a flat interface (15). The interface parallels both the axis (21) of the gudgeons and the axis (22) of the threaded section (23).

Abstract: A scissor jack having four aluminum arms of U-shaped cross section which are substantially identical and which may include a hollow aluminum lead screw. The threaded nut through which the lead screw is mounted may be made of glass fiber reinforced plastic as may the saddle which is adapted to engage the undercarriage of a vehicle.

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 mechanical jack comprising a base, on which a fixed frame is fixed. The fixed frame is substantially up-standing, slightly inclining toward one side with a supporting frame attached thereon to maintain the fixed frame in its inclined position. A moveable frame with one end thereof pivotally attached on the fixed frame is rotatable with respect to the fixed frame about the pivot. A threaded rod, which has a threaded portion engaging with an inner-threaded block pivotally mounted on the other end of the moveable frame by means of a replaceable bearing element and a smooth portion running through and secured on a pivot mounted on the fixed frame, retracts and extends, when rotated about the central axis thereof, the moveable frame with respect to the fixed frame so that heighten and lower a vehicle support attached on the moveable frame.

Abstract: A jack with a single leg, with a lifting arm that pivots around a stationary horizontal axis on the leg, with a threaded shaft that is articulated to the leg and engages the lifting arm either directly or by way of lever arms articulated to the leg, and with a manually operated crank that has non-rotationally secured to its end a claw that has a transverse slot and sides that can be employed to attach the claw to a transverse bolt on the end of the shaft loosely enough to allow the crank to activate the shaft even when it is not aligned with it. The transverse slot (17) in the claw (18) slides over the transverse bolt (20) and, at the end of the side of the claw, has a width (X) no greater than the diameter (21) of the bolt, in that the claw fits loosely enough around the bolt to allow it to rotate, and in that the sides (19) of the claw have prongs (22) that loosely surround the threaded shaft.

Abstract: This invention relates to a lift device adapted to transfer wheelchair passengers to commuter aircraft. A base and optional four post system provide support for a vertically moveable platform. An apron, which can be used either as a ramp from lowered platform to ground or a bridge from elevated platform to aircraft is provided. The platform is preferably raised and lowered using ball or acme screw-bushing brackets. The platform can be used to load and unload passengers from rear and front door commuter aircraft, on either side of the fuselage. The lift can be incorporated into a wheeled chassis, which can be lowered into ground contact at the position of use. Optionally extendible stairs are present to allow other passengers to enter or leave the aircraft using said platform and apron.

Abstract: A nonmetallic automotive jack includes a scissors assembly which is mounted on a base. The base includes a floor which flairs outwardly in a forward portion and outwardly in a rearward floor portion. The forward floor portion is longer than rearward floor portion. Inner side flanges are disposed upwardly from the base floor between the forward floor portion and the rearward floor portion. Perpendicular buttresses reinforce the inner flanges. The base has a multiplicity of tines that provide gripping traction for the base. The jack may be made of all plastic components or some combination of plastic and metal parts.

Abstract: An improved lift cap for a jack which comprises a two-piece lift cap that fit together with tab and slot arrangements and which allow the overall mass of the jack to be substantially reduced by allowing the width of the base and channels to be reduced. The improved lift cap has a raised portion which serves as a stop to align the jack and which also provides additional support to lift a vehicle which is being lifted by the jack.

Abstract: A mechanical jack comprising a base with wheels attached thereon for moving the jack, a primary arm of which an end is pivoted on the base so as to be rotatable with respect to the base, a secondary arm of which an end is pivotally mounted approximately on the middle of the primary arm so as to be rotatable with respect to the primary arm, and a threaded rod threadingly connecting between the free ends of the primary and secondary arms so that when the threaded rod is rotated, the free ends of the primary and secondary arms move towards or away from each other, depending upon the rotation direction of the threaded rod. With the pivoted ends as the rotation centers, moving the free ends of the arms will also heighten the free end of the secondary arm so as to lift a vehicle supported thereon.

Abstract: A jack for a car includes a support column having a middle region and a lower end. A base is articulated at the lower end of the support column and pivotable about a first transverse axis. A support arm is articulated at the middle region of the support column and pivotable about a second transverse axis extending in a given direction. The support arm has a free end with bearing surfaces having a circular segmental cross section. A spindle drive is actuatable by a hand crank for adjusting the free end in height. A load receiver has an open-top channel extending parallel to the given direction for engaging a structural part of a car to be supporting on a jack from below. The load receiver has a lower surface with a bearing extension in the form of a spherical section. A calotte-shaped bearing shell is at least partly congruent with and disposed between the bearing surfaces and the bearing extension for tiltably supporting the load receiver on the bearing surfaces in the form of a ball-and-socket joint.

Abstract: A jack in which a base plate is pivotable on an upright to a bottom surface. A supporting arm is also pivotable on the upright, and is actuated for being pivoted. The base plate is held in a predetermined position by a spring which has two sections. A first section of the spring rests against the upright and the base plate, whereas the second section of the spring rests against the base plate and an end of the supporting arm when this arm is completely folded up against the upright. The second section of the spring, furthermore, generates a spring torque which is directed opposite to the spring torque that is generated by the first spring section. The spring torque of the second spring section, moreover, exceeds the spring torque of the first spring section.

Abstract: A scissors jack which has improved formed gear teeth which allow a jack to be retracted to a very low profile so that it can be placed under the vehicles. The teeth of the lower pivot arms are formed so as to extend one direction and the teeth of the upper pivot arms are formed so as to extend in the opposite direction from the teeth of the lower pivot arms so that when the jack is in the down position, the gear teeth on the upper and lower pivot arms can pass each other and thus allow the jack to have a very low contour.

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: The invention provides apparatus for precise, well controlled positioning and levelling of factory constructed buildings. The apparatus comprises units used in pairs, one near each end of a building being installed. Each unit is a four wheeled vehicle with a jack at each end. Each wheel is independently driven and the units are remotely controlled, using cables, hydraulic or pneumatic hoses or wireless apparatus. In use the units are moved under the building under their own power and adjusted and maneuvered so that the jacks can engage the longitudinal beams used in factory manufactured buildings. The jacks are then operated to raise, lower and level the building and the wheels are driven to move the position the building desired. The jacks support pivotally mounted jack plates which can remain in secure engagement with the beam while the units are maneuvered such that the building can be moved lengthwise or sidewise or turned about an axis essentially perpendicular to the terrain.

Abstract: The invention concerns a jack (10) with at least one leg (12) and an arm (16) that is connected to it, that can move up and down with its position varied by an adjusting mechanism (26), and that has a supporting plate (40) at its outer and free end that pivots on a horizontal shaft (52) on the arm. The supporting plate is secured to the shaft by at least one eye (50) that is stamped out of the supporting-plate component, whereby the ends of the eyes are in one piece with components of the supporting plate.

Abstract: An improved jack with overload prevention including a lead screw having a driven end and an upstanding integral boss proximate the driven end, the driven end comprising a body abutting the upstanding boss and including an opening therethrough for receiving the end of the lead screw, the body carrying slots, grooves or recesses radiating from the opening and being in communication with the opening and carrying material from the lead screw displaced into the grooves thereby securing the body to the lead screw.

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: A power-operated lift and presenting mechanism has a base structure that is placed on the floor of an automobile. A carriage moves between an elevated position and a lowered, transport position when a lift assembly causes the carriage and base structure to be separated and brought closer together. The lift assembly is selectively power operated by a reversible electrical motor to expand to separate the carriage from the base structure and to contract to bring them closer together. The carriage has a track and track follower and a platform mounted on the track follower so that the platform is movable to and fro along the track. The platform is capable of supporting heavy and bulky articles. The platform is movable along the track when the carriage is in an elevated position, between a retracted position in which the platform is generally over the base structure and within the trunk, and a presenting position in which the platform extends out from over the trunk generally out of the trunk.

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: Lifting device which is a compact, pantographic-type jack with arms forming a pantograph, and driven by a central spindle. Lower arms are suitably linked to a base, with the upper arms suitably linked with respective lower arms. One of the upper arms is longer than the other of the upper arms, with the longer arm being provided with a movable support at a free end thereof, in turn having a device for fitting into or against an object to be lifted, such as an automobile. Furthermore, a support linkage is suitably secured between the movable support and the shorter upper arm.

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 vehicle lifting jack assembly having a pantographic mechanism carrying a head bracket for engagement with a jack point formed in a vehicle body. The head bracket is formed with a first groove extending in one direction for accommodating a downwardly projecting flange portion of the vehicle body so that the head bracket can be engaged with a lower surface portion of the vehicle body at the opposite sides of the flange portion. The head bracket is further formed with a second groove which extends perpendicularly to the first groove for engagement with a support bracket provided in the vehicle body for storing the jack assembly in the vehicle body.

Abstract: A pantograph jack for lifting and lowering a vehicle chassis or the like includes a pair of upper arms and a pair of lower arms pivotally connected to each other by a metal member and a nut member, and a manually operated rod member having a joint portion for supporting the metal member via a bearing member. The rod member is rotatably fitted in the metal member and threadably fitted in the nut member. A flat contact surface is formed on the metal member and is in contact with the bearing member.

Abstract: A scissors jack which has channel link members formed with slots which can be placed over rivets in the jack which have previously been staked in the base or the cap without the channel or link members. The invention relates in an improved jack which can be assembled quicker and easier since holes do not have to be formed in the channel members and the rivets inserted through such holes. The slots formed in the links are such that the links can be placed on the rivets and then rotated and then the free ends of the links are connected together with pivot pins and trunions during which time the links are rotated which locks the links to the rivets in the base and the cap so as to prevent the links from being withdrawn from the base or the cap.

Abstract: An attachment for supporting a heavy object, such as an automobile or truck transmission, to a mobile lifting jack of the type having a conventional, generally horizontal saddle member, the attachment being formed of a base plate attached to the saddle member in generally coplanar relationship, three independently operable, spaced apart, secondary scissor jacks each having a base supported on the base plate top surface and having a top bracket, and a load support plate having the lower surface thereof affixed to the secondary jack top brackets, the upper surface of the load support plate being adaptable to receive a heavy object, such as a transmission thereon, the height of the support plate being adjustable by the mobile lift jack as well as the secondary scissor jacks and the tilt of the load support plate being adjustable by the secondary lift jacks.