Abstract: The invention relates to a jack with supporting parts, which are provided as profiles that have U-shaped cross-sections and lateral profile limbs (15, 17) or which are provided as elements with laterally elevated sheet metal lobes (13). Said supporting parts are pivotally interconnected by joints (5, 6) in such a manner that the lateral profile limbs (15, 17) and/or the elevated sheet metal lobes (13) overlap in the vicinity of the joints (5, 6), and arbors pass through borings in the lateral profile limbs ( 15, 17) or elevated sheet metal lobes (13). The aim of the invention is to reduce the weight of a jack of the aforementioned type as well as the risk of the profile limb (15, 17) kinking.

Abstract: A scissor jack assembly with double-lead Acme threaded screw. Through use of urethane or similar material as a braking means, the jack assembly is operable with a self locking action over a wider range of loads and especially at lower loads where an Acme loading phenomenon that results in said self locking action has previously been unattainable. Faster and smoother jack operation is made possible by employing a thrust bearing, including a plurality of roller or ball bearings, with the jack assembly. A spacing washer is also provided to retain the threaded shaft within the trunnions of the jack assembly, in order that the ends of each of the trunnions need not be machined or stamped to retain the trunnions within the jack assembly. Utilizing such a spacing washer decreases the costs involved with manufacturing the jack assembly, while increasing the ability to repair the jack assembly.

Abstract: A description is provided of a lift which is defined as “low-level”, owing to the fact that in the articulation position in which the scissors are closed, the oleodynamic cylinder which generates the thrust force does not project above the height of the folded arms of the scissors-type articulation. The lift according to the invention comprises: a scissors-type articulation with a plurality of arms, and means for generating a thrust force, in order to bring the said scissors-type articulation from a closed position to a position which is at least partially open, and corresponds to partial or total lifting, the said means for generating a thrust force acting along a direction of thrust, characterized in that it additionally comprises a mobile lever which is pivoted at a fulcrum point which is spaced from the said direction of thrust, and against which the said means for generating a thrust force act in a pivoting manner.

Abstract: The specification describes economical lifting devices. A consumer jack comprising a rectangular base; a pair of connecting arms that are pivotally attached to the front end of the base, and a pair of lift arms that are attached to the connecting arms and attached at the rearward ends thereof to a sliding block. A screw-threaded actuator shaft is engaged with the sliding block to raise and lower a lifting pad attached to the forward ends of the lift arms of the device. The components are stamped from steel sheet and plate, and folded into the desired configuration, and assembled without the need for machining or welding. An economical power unit, for use with an economical jack stand and also for use with a lift bridge, comprises an adaptation of the consumer jack. The power unit does not use the lifting pad, but rather utilizes a pair of separated leveling pads pivotally attached to the forward ends of the lift arm for engagement with a lift collar of the jack stand.

Abstract: A vehicle jack with a reinforced nut and a device to eliminate noise when the jack is in the folded position. The nut is composed of two bodies (5, 5′), outer and inner, respectively, which have mutual additional surface contact point (6, 20) and (11, 17) and the reinforcing part has some lugs (34) that engage the more forward or front end of the screw spindle.

Abstract: The specification describes economical lifting devices. A consumer jack comprising a rectangular base; a pair of connecting arms that are pivotally attached to the front end of the base, and a pair of lift arms that are attached to the connecting arms and attached at the rearward ends thereof to a sliding block. A screw-threaded actuator shaft is engaged with the sliding block to raise and lower a lifting pad attached to the forward ends of the lift arms of the device. The components are stamped from steel sheet and plate, and folded into the desired configuration, and assembled without the need for machining or welding. An economical power unit, for use with an economical jack stand and also for use with a lift bridge, comprises an adaptation of the consumer jack. The power unit does not use the lifting pad, but rather utilizes a pair of separated leveling pads pivotally attached to the forward ends of the lift arm for engagement with a lift collar of the jack stand.

Abstract: A scissor jack assembly with double-lead Acme threaded screw. Through use of urethane or similar material as a braking means, the jack assembly is operable with a self locking action over a wider range of loads and especially at lower loads where an Acme loading phenomenon that results in said self locking action has previously been unattainable. Faster and smoother jack operation is made possible by employing a thrust bearing, including a plurality of roller or ball bearings, with the jack assembly.

Abstract: The invention relates to a jack comprising a stand body, which rests on the ground (4) and which consists of a stand column (1) and foot (2), and comprising a supporting arm (5), which is fastened to the stand column (1) in a manner that permits it to move around a fixed horizontal pivotal axis, and which is directly or indirectly raised or lowered in relation to the ground (4) by means of a movement spindle (7). The free end (6) of the supporting arm is provided with a fixed or pivotal supporting part, and the end that engages inside the stand column (1) comprises a denticulation, which engages inside a counter denticulation of a control slide (10) and which displaces the control slide (10) parallel to the longitudinal extension of the stand column (1). The aim of the invention is to simplify the control slide (10) and to make the production thereof more economical.

Abstract: A lightweight, portable jack for a wheeled vehicle is provided. The jack includes a high-torque electric motor adapted to use the electric power supply from the vehicle through electrical connectors connectable to the terminals of the vehicle battery or through use of an electrical connector which may be plugged in to the cigarette lighter receptacle. The jack is fully movable from a recessed position within a low profile casing and is operated by a remote control device so that it can lift the wheel of a vehicle from an operator position well out of the path of traffic or, if desired, from inside the vehicle. The jack disclosed is of lightweight construction so that it can be removed from storage and positioned by practically any vehicle operator.

Abstract: In the case of a jack with a supporting element, at which the insertion trunnion (11), which can be folded vertically over a joint (12), is mounted with a stop (16) limiting the depth of insertion, in order to construct the stop (15) and fix it securely and reliably in position in a simple manner and so as to have little weight, it is a part of an intermediate layer, which is disposed in the region of the joint (12) between the insertion trunnion (11) and the supporting element.

Abstract: Jack with an erect component in the form of a leg (1) that rests against the ground (4) and of a foot (2) articulated thereto and with a vehicle-lifting arm (6) that pivots around a fixed horizontal axis on the leg. The arm can be directly or indirectly raised or lowered away from and toward the ground by means of a spindle (7). The arm is provided with a fixed or pivoting vehicle-supporting component at its free end. At the other end, which engages the leg, the arm is provided with appropriate controls that displace a slide (10) along the leg such that the lower end (19) of the slide can come to rest against the leg-supporting surface (3) of the foot. The object is a lighter-weight jack that will be just as sturdy. A stop (21) is accordingly positioned on top of the leg-supporting surface and facing the slide's lower end.

Abstract: A scissor jack assembly with double-lead Acme threaded screw. Through use of urethane or similar material as a braking means, the jack assembly is operable with a self locking action over a wider range of loads and especially at lower loads where an Acme loading phenomenon that results in said self locking action has previously been unattainable. Faster and smoother jack operation is made possible by employing a thrust bearing, including a plurality of roller or ball bearings, with the jack assembly. A spacing washer is also provided to retain the threaded shaft within the trunnions of the jack assembly, in order that the ends of each of the trunnions need not be machined or stamped to retain the trunnions within the jack assembly. Utilizing such a spacing washer decreases the costs involved with manufacturing the jack assembly, while increasing the ability to repair the jack assembly.

Abstract: A height-adjustable cart is provided and includes an undercarriage having a wheeled frame, a double scissor-type lift mechanism and a support frame which is height-adjustable relative to the wheeled frame by the lift mechanism. The wheeled frame includes a pair of extendable rear wheel supports which are each pivotable between a retracted position and an extended position. While in the retracted position, the wheels are in close proximity to the frame, thereby defining a small cart “footprint” for compact storage. While in the extended position, the wheels extend transversely away from the frame, thereby widening the cart “footprint” for stability and for ease of transportation. The height-adjustable cart further includes a detachable table onto which heavy equipment may be loaded. The detachable table includes wheels suitable for carrying the weight of the equipment and for transporting the heavy equipment thereon separate from the undercarriage.

Abstract: A scissor jack assembly with double-lead Acme threaded screw. Through use of urethane or similar material as a braking means, the jack assembly is operable with a self locking action over a wider range of loads and especially at lower loads where an Acme loading phenomenon that results in said self locking action has previously been unattainable. Faster and smoother jack operation is made possible by employing a thrust bearing, including a plurality of roller or ball bearings, with the jack assembly. A spacing washer is also provided to retain the threaded shaft within the trunnions of the jack assembly, in order that the ends of each of the trunnions need not be machined or stamped to retain the trunnions within the jack assembly. Utilizing such a spacing washer decreases the costs involved with manufacturing the jack assembly, while increasing the ability to repair the jack assembly.

Abstract: A lifting rack for elevating motorcycles or other two-wheeled vehicles for ease of maintenance. The rack comprises a channel with a base plate that may be laid flat on a ground or floor surface, and upstanding side walls that provide lateral stability for a two-wheeled vehicle as the vehicle wheels are positioned on the base plate. The rack also comprises ground or floor surface engaging rails. A linkage mechanism connects the rails to the channel. A hydraulic motor, anchored on the rails, applies a lifting force to the linkage elements, thereby creating a vertical lift force component, the base plate supporting the vehicle wheels as the vehicle lifted. One end of the channel may be separated from the main portion of the channel and separately articulated on the rails, whereby one vehicle wheel may overhang the end of main channel portion.

Abstract: In a pantagraph-type jack, a base comprises an upper base member and a lower base member which are connected to each other relatively movably in the vertical direction, inner ends of a pair of lower arms are swingably connected to the upper base member via a pair of lower pivots arranged in the horizontal direction, lower sector gears are formed on the outer peripheries of the inner ends of the two lower arms, and a lower rack which meshes with the lower sector gears is disposed in the vertical direction and secured on the lower base member, and it is arranged such that at the same time as the two lower arms are erected the lower sector gears ascend the lower rack. Thus, the amount of lift of the load bearing platform can be increased without increasing the lengths of the lower arms, the upper arms and the threaded rod.

Abstract: A directly driving electromotive jack device for releasing a torsional force comprises a jack with a driving screw rod, an electromotive motor arranged with a deceleration gearbox, a torsional force releasing means directly connected to a positioning plate and the jack, a power supply directly switch operable by an operator. The torsional force releasing means serves to connect the electromotive motor with the jack. The torsional force releasing means comprises a positioning plate for fixing the electromotive motor; two or more than two symmetric arms of torsional force; a bearing for being passed through the electromotive motor; and a switch connected to the driving screw rod. The electromotive motor is fixed to the positioning plate by a plurality of studs. The arms of torsional force serve to connect the positioning plate with pivotal shafts of the jack. The rotary shaft of the electromotive motor and the driving screw rod are positioned in a same central line.

Abstract: A lifting apparatus which is readily portable between locations and whose design allows for readily replacement and/or repair of component parts thereof to enhance both serviceability and maintenance of the lifting apparatus is disclosed. The lifting apparatus includes a support table, a base frame disposed beneath the support table, a linkage assembly for maintaining the table and the base frame in generally parallel relation relative to each other as the table moves between raised and lowered positions, and a pneumatically operated actuator for moving the table between the raised and lowered positions. The base frame of the lifting apparatus defines at least one opening for allowing tines of a moving device to be inserted therethrough, thus, allowing the lifting apparatus of the present invention to be readily transported between locations.

Abstract: A scissor jack assembly with double-lead Acme threaded screw. Through use of urethane or similar material as a braking means, the jack assembly is operable with a self locking action over a wider range of loads and especially at lower loads where an Acme loading phenomenon that results in said self locking action has previously been unattainable. Faster and smoother jack operation is made possible by employing a thrust bearing, including a plurality of roller or ball bearings, with the jack assembly. A spacing washer is also provided to retain the threaded shaft within the trunnions of the jack assembly, in order that the ends of each of the trunnions need not be machined or stamped to retain the trunnions within the jack assembly. Utilizing such a spacing washer decreases the costs involved with manufacturing the jack assembly, while increasing the ability to repair the jack assembly.

Abstract: This invention relates to the leveling of devices, and more particularly, to the leveling of leg supported devices, such as pool and billiard tables. In accomplishing the foregoing and related objects, the invention provides a scissors mechanism overlying a special base and underlying a special rubber-padded saddle.

Abstract: The invention relates to a jack, the jack comprises a base for placing on the ground and an elevator mechanism which bears against the base via a leg (1) linked to the base by a device so that the leg can pivot on the base about a horizontal axis X′X and can slide on the base along the axis, the jack being characterized in that the base (5) has a longitudinal rig (5b) with a rounded top projecting above the base, the rib defining the axis, the leg (1) is provided at its bottom end with a slide (8) made of a block of synthetic organic material engaged in the bottom end and held to the leg by a device, the slide being shaped so as to be capable of fitting astride the rib of the base with the ability to pivot on the rib about the axis and to slide along the rib, and a link device (9, 10, 12) is established between the leg and the base to hold the slide on the rib. The invention applies in particular to a jack for lifting a vehicle.

Abstract: A pantagraph-type jack includes a pair of lower arms and a pair of upper arms. Upper ends of the lower arms and lower ends of the upper arms are connected to each other through first and second connecting shafts. An externally threaded rod is rotatably but axially non-movably supported on the first connecting shaft and threadedly engaged with a threaded bore provided in the second connecting shaft. In the pantagraph-type jack, the externally threaded rod is formed into a hollow shape, and external threads of the externally threaded rod are provided with a tapered portion formed in a convergent shape over a given light-loaded area from a tip end on the side of the second connecting shaft. Thus, a reduction in weight of the externally threaded rod can be provided, and the threaded engagement of the externally threaded rod with the threaded bore in the second connecting shaft can be conducted easily, which contributes to a reduction in weight and an enhancement in assemblability.

Abstract: A motorcycle jack including a support assembly (SA) for engagement with a first part (S) of a motorcycle and a lifting assembly (LA) for engagement with a second part (S) of the motorcycle, the first and second parts being on opposite sides of the motorcycle. The lifting assembly (LA) is adjustable between an initial position in which both motorcycle wheels (W) are in contact with the ground and a lifted position in which one motorcycle wheel is raised above the ground (G).

Abstract: A jack with a leg (1) and a supporting arm (2) articulated together by an articulation (3). The leg rests against the ground (5) by way of a foot (4). The supporting arm is articulated by another articulation (18) at the other end of the supporting arm to a load-support plate (19). The plate supports the vehicle as it is lifted by way of an innermost section (20) located preferably between the sill ridge (21) and the midline, and below the bottom (22), of the vehicle. The plate has a bodywork catch (25) with a bent-up section (26). The bent-up section comes to rest against the outside (23) of the sill (24) when the jack is used and is raised by a spring (28). Adjusting arms (9& 10) are articulated to the leg, to the supporting arm, and to each other, constituting a parallelogram linkage. One end (17) of the supporting arm projects beyond its articulation (7) to its associated adjusting arm (9).

Abstract: A vehicle jack of the type known as "Y-jacks". It has a base plate (1) with perforated fins that receive and fix, in a particular way, the protruding necks on the wings of the jack body. A nut (13) is secured to the end of the body, with easy entrance into the end and fixed by some lugs (14) which are bent over the central portion of the nut. The arm (3) of jack also has two protruding necks towards the interior, on which a cross member is received, formed by a part with a U-shaped section whose wings or sides clasp on to the necks, are made with U-shaped openings. The base of the cross member is controlled by a special easy entrance holder plate on the housing on the arm. An arm (30) of a specially designed shape acts in combination with a holder plate-cross member, whose seating for the vehicle has a metal insert. This holder plate-cross member is provided with an external retainer on which the end of the screw spindle is supported.

Abstract: This is an articulated jack with two pairs of arms, connecting at one end with a nut (11) and at the other with a bar (12). Both these are in turn connected by a spindle worked by a crank winding handle. The other ends of the arms rotate around a base (1) and a gripping device (2.about.. The outer arms (3, 4) and inner arms (5, 6) are in turn connected by auxiliary parts (18). The actual size of the jack has been considerably reduced.

Abstract: A safety vehicle lift having a base, a lifting assembly, a drive mechanism, a handle, and a ramp. The base is made of flat rigid construction which may be in one or two sections and may be of solid or grated construction. When in two sections, the sections may be permanently abutted with a hinge or may be temporarily abutted with conventional locking mechanisms. The base contains retractable wheels. The base is wider than the structures supported by the base. A drive mechanism is made up of a jackscrew passing through a threaded cross brace. When the jackscrew is turned manually or mechanically, there is a raising or lowering of the support platform. The lift is provided with a ramp having side walls and leading from the level of the base to the level of the support base. The ramp may be of solid or grated construction. The lift has less weight and equivalent strength compared to prior lifts, thus improving mobility. As the base is grated, the lift may be used on a wide variety of surfaces.

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 lightweight vehicle jack of the "Y" type includes aluminum, particularly in the arm (2) and the central body of the device (1). A gripping device (7) provides a larger surface area to take the edge of the body of the vehicle. On the side to which the nut (4) is fitted, the body of the device (2) has lateral reinforcing vertical ribs at 90 degrees, and there is an L-shaped internal reinforcement device (20) between the gripper (7) pivot and the pivot of the shaft of the bar (5), to reduce the thickness of the arm (1). The support base controls the body's passage to the interior of the jack.

Abstract: This invention relates to the construction of a pantograph jack and, in particular, to an improvement in the construction of a pantograph jack wherein the pins connecting the arms to the base and load rest of the jack are replaced with extrusions emanating from those parts. In particular, the pantograph jack of this invention has four arms, including two lower arms, and two upper arms. Each of the lower arms has a gear end to rotate with respective gear ends mounted in a base, meshing to control the rotation of one lower arm with respect to the other lower arm. Each of the upper arms has a gear end mounted in a load rest to rotate with the gear ends of both upper arms meshing to control the rotation of one upper arm with respect to the other upper arm. The improvement comprises axles extruded at positions on axes of rotation of one or more of the gear ends, and the axles providing means to mount the arms in the base or the load rest.

Abstract: A jack configuration, which may be characterized as a half scissor jack, which achieves the objects of simplifying manufacture by reducing component parts and limiting overall size of the jack while providing the requisite load bearing and height variation characteristics appropriate to the intended vehicle lifting and which furthermore reduces the potential for a torsional deflection in the base channel. Torsional deflection is reduced by creating a box section in the base channel, preferably by providing a channel bracket structure that spans the base channel to maintain the spacing of the side walls of that component.

Abstract: A vehicle jack that provides a rotation shaft (4) for the support plate (3) on the vehicle support arm (2) and a nut to be received in the end of the jack support leg (1), through which the screw-threaded spindle shaft passes. The rotation shaft (4) rests on and passes through sets of holes in the vehicle support arm (2) and the support plate has downwardly projecting side fins (6), through which the said shaft also passes. The nut (12) determines a set of diametrically opposed projections (22) with an irregular outer surface, through which it is fixed to the holes (16, 18) cut in the side end wings of the vehicle support arm.

Abstract: The present invention relates to a multi piece trunnion. More specifically, this invention relates to a multi piece trunnion for use in scissor-type jacks. The multi piece trunnion allows the use of a trunnion segment with an enlarged center section without a corresponding increase in the size of the channel members of the jack. The enlarged trunnion segment increases the load capacity if the scissor jack without a significant size or weight increase.

Abstract: The present invention relates to an attachment device for securing to a conventional screw jack allowing the screw jack to be operated with a power tool. The device comprises a cylindrical shaft having first and second ends with a transverse bore proximal a first end thereof. Received within the transverse bore is a tubular member having two opposing ends with a clamp member pivotally attached to an end thereof. Attached to a second end of a cylindrical shaft is an engagement member dimensioned to lockably engage a drive member on a power tool. Accordingly, the tubular member may be secured to a handle bracket on a conventional screw jack and the shaft may be rotated with a power tool to automatically raise or lower the jack.

Abstract: A tool for clamping against the interior of a chimney flue having a scissors jack mechanism for adjustably clamping into various size chimneys. A seal plate for sliding over the shaft of the clamping device and for tightly sealing against the interior chimney flue walls. A cleaning brush mechanism affixed to the end of a tubular member, sized to slide over the clamping shaft for cleaning the interior of a chimney.

Abstract: An on-board storable system for repairing a flat tire on an automobile comprising a utensil adapted to endow a power impact wrench to actuate a scissors jack. Such system preferably includes an air compressor for inflation of a replacement tire after mounting the wheel bearing the replacement tire has been secured to the hub with the impact wrench. An alternative system utilizing the utensil and a power impact wrench comprises an air reservoir; compressor; electro-mechanical means for driving the compressor; a pneumatic distribution system; the pneumatic distribution system conveying air from said reservoir to an air distribution post for each wheel of the automobile; and tubular means for conveying air from said posts to a tire proximate each said post. The electro-mechanical power transmission means being selected from the group comprising an engine driven belt powered pulley; an auxiliary battery and associated electric motor; and an electric motor driven by the automobile electric system.

Abstract: A scissors jack has first and second upper channels having first and second opposite ends and joined by first and second pivot pins to a load bearing member at the first ends. First and second lower channels have first ends joined to the second ends of the first and second upper channels at third and fourth pivot pins, and second ends of the first and second lower channels are joined by fifth and sixth pivot pins to a base having a floor portion and upwardly extending sidewalls. Gear teeth are formed at opposite side walls at the second ends of the first and second lower channels and which intermesh at an engagement region between the fifth and sixth pivot pins. A screw has one end received through an aperture associated with the third pivot pin, and an opposite end is received in a threaded aperture associated with the fourth pivot pin.

Abstract: A new combination wheel ramp and jack for raising a wheel and a corresponding part of the vehicle so that access to the underside of the vehicle is more easily achieved. The inventive device includes a lower support base assembly, an upper wheel platform assembly, a scissors assembly connecting the support base assembly and the wheel platform assembly and causing vertical movements of the wheel platform assembly when actuated, and a screwjack assembly connected to the scissors assembly for actuating the scissors assembly and thus causing vertical movement of the wheel platform assembly.

Abstract: A vehicle jack that provides a rotation shaft (4) for the support plate (3) on the vehicle support arm (2) and a nut to be received in the end of the jack support leg (1), through which the screw-threaded spindle shaft passes. The rotation shaft (4) rests on and passes through sets of holes in the vehicle support arm (2) and the support plate has downwardly projecting side fins (6), through which the said shaft also passes. The nut (12) determines a set of diametrically opposed projections (22) with an irregular outer surface, through which it is fixed to the holes (16, 18) cut in the side end wings of the vehicle support arm.

Abstract: A vehicle jack with an upright assembly and an arm articulated thereto around a fixed horizontal axis. The free end of the arm bends toward the vehicle and is directly or indirectly raised away from and lowered toward the ground by a spindle. To simplify obtaining an angle in the arm, the main section of the arm is straight and an angled section is form fit onto its free end.

Abstract: There is provided a multi-degree-of-freedom positioning mechanism having a guide shaft and first and second moving members movably mounted on the guide shaft. Each drive is connected with the first and second moving members so as to allow the moving members to travel along the guide shaft. The machanism has a pair of foldably joined equally long links, which are pivotally rotatably engaged with the first and second moving members by first and second couplings. Furthermore, one edge of a table is pivotally rotatably engaged with the joint between the mating links of the foldably joined equally long links, to displaceably support the table.

Abstract: A driving joint includes a joint block secured to an output shaft of an electric driving unit, and a U-shaped connection plate connected at its opposite ends to the joint block and provided at its front wall with an elongated connection hole. The connection plate can be engaged within the U-shaped driven joint, and the elongated connection hole can be fitted to a connection plate of a T-shaped driven joint. With this arrangement, various types of jacks having different types of driven joints can be driven by a single electric tool.

Abstract: This invention relates to a lifting jack for automobiles and other vehicles. In particular, a one piece load rest is disclosed having a top surface with elements including a flat, a trough, and a ridge to connect to a vehicle, and having right and left legs to straddle and to fasten to a jack. The jack is characterized in that: the load rest is formed from a flat plate that in two dimensions has a first section with a first locking connector, a second section with the legs extending laterally outwardly, a third section outlining the elements of the top surface, and a fourth section with a second locking connector. The third section is bent to form the flat, trough, and ridge elements of the top surface. The legs of the second section are bent upwards, and the second section is bent under the top surface to project the legs downwardly. The first locking connector is joined to the second locking connector to secure the load rest together.

Abstract: This invention relates to the construction of a pantograph jack and, in particular, to an improvement in the construction of a pantograph jack wherein the pins connecting the arms to the base and load rest of the jack are replaced with extrusions emanating from those parts. In particular, the pantograph jack of this invention has four arms, including two lower arms, and two upper arms. Each of the lower arms has a gear end to rotate with respective gear ends mounted in a base, meshing to control the rotation of one lower arm with respect to the other lower arm. Each of the upper arms has a gear end mounted in a load rest to rotate with the gear ends of both upper arms meshing to control the rotation of one upper arm with respect to the other upper arm. The improvement comprises axles extruded at positions on axes of rotation of one or more of the gear ends, and the axles providing means to mount the arms in the base or the load rest.

Abstract: This invention relates to the construction of pantograph jacks and, in particular, relates to the construction of an improved trunnion for connecting the pantograph jack arms to the drive shaft. In particular, a pantograph jack is disclosed that has at least one joint including an end of an upper arm, an end of a lower arm, and a drive screw shaft all connected by a trunnion means. The improved trunnion comprises a rectangular plate having a length extending from a first end to a second end, and including a substantially flat first section, a curved second section folded back over the first section to juxtapose the second end to the first end, and the first section and the second section having first and second holes, respectively, aligned and sized to receive the drive screw shaft for sliding movement.

Abstract: Pivot for articulating the load-bearing components of a jack. The pivot comprises a shaft that rotates in a bore. The components are lengths of U section or have lateral flanges or upright edges that overlap in the vicinity of the pivot. The object is to decrease the weight of the jack. Instead of a solid bolt, the axis is a hollow neck (19) stamped through the sides (15 & 17) or flanges (13) of one component and extending through the bore (18) in its counterpart.

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: An bi-directional, adjustable elevating and support mechanism to assist in the removal, installation and repair of rack-mounted items such as electronic telecommunications modules by supporting and aligning such modules during the removal, installation and repair of such modules from support racks.

Abstract: A device for moving beds includes a moveable frame (2); a lifting mechanism (4) which can cooperate with the underframe of a bed (49); and a steering mechanism (5).

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.