Abstract: A vibration absorber jack including a tripod type base, a jack, an absorber positioning mechanism, and a vibration absorber holder. The jack is attached to the base, the absorber positioning mechanism disposed on top of the jack; and, the vibration absorber holder attached to the absorber positioning mechanism such that the vibration absorber holder can be positioned and moved by the absorber positioning mechanism.

Abstract: A support assembly useful in supporting a plumbing fixture in the course of effecting connections thereto includes a base provided with a vertical tube segment supporting a nut assembly threadably engaged to a rod partly received in the segment with the upper rod end supporting an adapter conformed to the supported fixture. An offset bar fixed to the rod exterior engages a lateral recess on the segment to fix the rod in rotation as the nut assembly is turned. The assembly may include rods of differing lengths and adapters of various forms.

Abstract: A support assembly useful in aligning and mounting a garbage disposal to the drain fitting of a sink includes a base provided with a vertical tube segment supporting a nut assembly threadably engaged to a rod partly received in the segment with the upper rod end supporting an adapter conformed to the disposal. An offset bar fixed to the rod exterior engages a lateral recess on the segment to fix the rod in rotation as the nut assembly is turned. The assembly may include rods of differing lengths and adapters of various forms.

Abstract: A motor-operated jack for vehicles includes a lifting unit, which includes a spiral lifting ram having an internal thread limitedly formed at a lower portion of the spiral lifting ram, and a pin held in a horizontal groove formed at the top end of a primary screw. This pin is slightly projected into two longitudinal holes symmetrically formed at the top portion of a secondary screw. There is also a coil spring, a spring cover and a snap ring sequentially laid on the top of the pin. There is also a support ram, having a top support and an external thread, movably fitted in a gap between the secondary screw and the spiral lifting ram while engaging with an internal thread of the spiral lifting ram at the external thread, thus allowing a user to control the moving stroke of the lifting unit as desired.

Abstract: A jack assembly for supporting a shelter structure includes a first tubular member fixed at a first end thereof to a plate, a nut disposed in the first tubular member and fixed to the plate, the plate defining a central hole aligned with a central hole in the nut, and a threaded shaft extending through the plate central hole and threadably engaged with the nut, the shaft having thereon a flat sided base portion. A second tubular member is telescopically mounted on and moveable on the first tubular member to elongate the assembly, and a lock member is provided for locking the second tubular member to the first tubular member in a position in which the first and second tubular members overlap and the lock member is disposed in a region of the overlap.

Abstract: A fail-safe ball screw assembly has a double-start screw and a corresponding nut. The screw has a first helix with a truncated, smaller diameter flat and an intertwined second helix with an extended, larger diameter flat. Similarly, the corresponding nut has a first helix with an extended, larger diameter flat and an intertwined second helix with a truncated, smaller diameter flat. When the screw is inserted with the nut, the screw's truncated first helix is paired with the nut's extended first helix, and the screw's extended second helix is paired with the nut's truncated second helix. The nut and screw helixes combine to form channels in which bearings balls travel. The bearings allow the fail-safe ball screw assembly to operate with high efficiency and precision, while the overlapping structure of the helixes prevents catastrophic failure caused by the removal or loss of the bearing balls.

Abstract: The push actuator has a fixed base which rotatably carries a selectively rotatable rotor. A horizontal band has a lower portion stacked in a helical pattern and has an upper portion engaged by the upper portion of a vertical band, to form a telescopic column. The lower portion of the vertical band is stacked in a spiral, separately from the horizontal band, the horizontal band is supported on the rotor with a helical ball support track along which a number of balls can roll and slide, to allow substantially frictionless rotation of the rotor member while the horizontal band remains rotatably stationary. A ball re-circulation unit allows the balls to circulate between the top of the track and the bottom of the track.

Abstract: An electromotive adjustment assembly, includes at least two spindles, each spindle carrying a spindle nut, with both spindle nuts secured against executing a rotation movement. A motor unit is positioned between the spindles and coupled in driving relationship with the spindles for rotating the spindles, whereby the spindles are secured against displacement in longitudinal direction. Connected, directly or indirectly, to the spindle nuts are flexible pull strands which are trained over deflection rollers for attachment with their free ends to profiled lifting members which are secured at an angle to a structure to be adjusted.

Abstract: A cabinet mounting support device for supporting a cabinet at a selected height for mounting the cabinet. The cabinet mounting support device includes a base plate. A substantially hollow first tubular member is elongated and has a first end securely coupled to a top surface of the base plate such that the first tubular member is in a generally vertical orientation. The first tubular member has a plurality of pairs of opposed and aligned apertures therein extending between the first and second ends of the first tubular member. A second tubular member is elongated and has a first end and a second end. The second tubular member is substantially hollow. The first end is movably extendable into a second end of the first tubular member such that the second tubular member is telescopic with respect to the first tubular member. The second tubular member has a pair of opposed apertures therein positioned generally adjacent to the first end of the second tubular member.

Abstract: A cable lift includes a platform supported on posts and raised and lowered by cables. Yoke ends support the platform on the posts by means of dogs which project into openings in latch plates on said posts. The dogs are retracted in order to lower the platform. In the event of a slack cable condition, a slack cable actuator moves the dogs back into contact with the latch plates.

Abstract: A brace for protecting windows and buildings during a high wind storm is disclosed. The brace includes a rigid member sized so as to fit within a window frame containing the window to be protected, and double-sided tape affixed to one side of the rigid member for affixing the rigid member to the window to be protected. Various method for imparting a force to the brace to cause it to become firmly wedged within the window frame of the window and building to be protected are also disclosed, and include the use of the installer's hands, the use of a hinged member rotatably connected to the brace which is capable of being wedged against the window frame, the use of a swing arm connected to the brace which can be firmly wedged against the window frame, and the use of a ratchet to advance a dampening member from within the brace to firmly engage the window frame. Methods of using the disclosed brace are also disclosed.

Abstract: The present invention provides an electric version of a dispenser unit and method of monitoring a request signal for filling empty baskets, movement of the empty baskets on a loading ramp via a stop gate, and movement of the filled basket between a loading station and a staging station via a basket lift. The stop gate is driven by an electric motor, and the basket lift is driven by another electric motor. Sensors are mounted in the stop gate and the basket lift to indicate positions of the stop gate and the basket lift, respectively.

Abstract: A linear actuator including a mechanism for preventing accidental drop of an inner cylinder caused when a driven nut engaged with a drive screw shaft is broken. The drop prevention mechanism includes a drop prevention nut threaded with the drive screw shaft in close proximity to the driven nut, a shear pin secured at one end to one of the drop prevention nut and the inner cylinder or the driven nut, and a shear pin guide groove formed in the other of the drop prevention nut and the inner cylinder or the driven nut for slidably receiving a projecting free end portion of the shear. When the inner cylinder and the driven nut is displaced in a direction of a load acting on the inner cylinder, the shear pin is broken or sheared by engagement with an end wall of the shear pin guide groove. Upon shearing of the shear pin, the drop prevention nut supports thereon the inner cylinder or the driven nut to thereby keep the inner cylinder in position against drop.

Abstract: A screw device for imposing spreading forces on opposing surfaces, having a pin adjustable length and employing a rod member having a groove in the end for engaging the pin.

Abstract: The invention concerns a device making it possible to firstly limit the dynamic or static force applied to a linear electric jack with a reversible screw/nut system, and secondly translation-disengage the screw of the jack. This device is formed of an element (2) integral with the screw (7) of the jack and an element (1) integral with the activated load and interconnected by a friction system (3). The force applied on the screw (7) tends to make the latter rotate inside the screw (8) of the jack. This rotation is stopped by the friction system (3) until the latter slides and separates the elements (1) and (2). The screw (7) then rotates with respect to the element (1) which limits the force. The replacement of the friction element (3) by a coupling makes it possible to externally control the rotation and translation of the screw (7). The end of travel stops (13) secured to the screw (7) rotate with this screw whilst retaining their characteristics.

Abstract: A apparatus and method for moving and aligning objects such as machine components includes a plate positionable beneath and engageable with an object to be moved, a block engageable with the plate, and a bolt extending through a bore in the block. The bolt includes an end which is positionable adjacent to the object to be moved and which is rotatable within the bore to cause axial movement of the bolt. Such axial movement of the bolt causes the end of the bolt to push against the object to be moved and to thereby move the object.

Abstract: A high-precision positioning post having alternating parallel cuts transving the center-line of the shaft body and which are perpendicular to the major axis of the shaft. The shaft further comprises a bearing rod internal to the shaft which is acted on by a screw. As the screw is turned, the bearing rod forces the end of the shaft to axially translate an object without rotation. This allows an object integral to the shaft or mounted on the shaft to be translated and located along the major axis of the shaft without rotation of the object. In an alternate embodiment the present invention may be used to isolate vibration by inclusion of dampers in the hollow shaft. A third embodiment uses the basic design as a vibration isolation mechanism for buildings.

Abstract: A rehabilitation bed for accommodating an obese person includes a main frame with separate forward and rearward frame structures connected together end-to-end and constituting mirror images of one another, forward and rearward deck structures for supporting a mattress thereon being mounted to and resting upon the forward and rearward frame structures, head and foot actuator mechanisms pivotally mounted to the forward and rearward frame structures and pivotally coupled to the forward and rearward deck structures, separate forward and rearward carriages underlying and supporting the respective forward and rearward frame structures of the main frame, front and rear actuator mechanisms respective pivotally coupled to a front linkage assembly of the forward carriage and a rear linkage assembly of the rear carriage and operable between extended and retracted conditions to pivotally move the front and rear linkage assemblies reciprocally along arcuate paths being mirror images of one another to cause the forward and

Abstract: A screw-type lift having a ratchet lifting nut assembly providing for the safe lowering of a load while preventing additional lifting of the load upon failure of a lifting nut is disclosed. The ratchet lifting nut assembly includes a lifting nut and an auxiliary nut threadably engaging a lifting screw and a wear gap separating the lifting nut from the auxiliary nut. A ratchet portion is supported on the auxiliary nut and is aligned for engagement with a pawl supported on the lifting nut. During a normal mode of operation, the lifting nut supports the entire weight of a load and the ratchet portion and pawl cooperate to restrain rotational movement of the auxiliary nut relative to the lifting nut. A failure mode of operation is defined when the lifting nut is excessively worn in that it can no longer safely support the load. In this mode, the wear gap is eliminated wherein the auxiliary nut is supported on the lifting nut and the load is supported solely by the auxiliary nut.

Abstract: A flat lifting device includes an outer and an inner hollow section rail with closed cross section and with a substantially greater width than a thickness. One of the section rails is acted upon by a drive unit having a linearly moveable drive member for shifting the one section rail relative to the other section rail. Opposing surfaces of the outer and inner section rails are preferably provided with meshing profiles which extend in moving direction of the slideable section rail.

Abstract: The drive screw system comprises a drive screw and a drive nut adapted for driving a cooperating member such as a vehicle restraining device between the proximal and distal ends of the drive screw. At least one bearing assembly is mounted to a track for supporting the drive screw and automatically moving between the proximal and distal ends of the drive screw in response to the drive nut to automatically maintain a predetermined maximum unsupported length of the drive screw. Each bearing assembly comprises two bearing supports connected at a fixed length and which are coaxially disposed relative to each other. In one embodiment, the length of each bearing assembly are integral multiples of the smallest fixed connecting length and the drive screw has stationary bearing supports disposed at the proximal and distal ends wherein the distance between the stationary supports is (n+1)*L where n is the number of bearing assemblies and L is the length of the shortest bearing assembly.

Abstract: A lifting device for a load, such as a vehicle, includes a substantially vertical column forming a frame and a lifting device movable along the column under the action of a rotation control of a threaded ball driven by a driving unit, a reversible-type nut, such as a ball nut, for moving along the threaded rod, and a friction unit capable of creating, during a control of a down movement of the lifting device, a resistance torque of a modulus at least equal to a torque generated by the load resting on the lifting device. The lifting device also including a device capable of overcoming the friction unit during a control of an up movement of the lifting device and a load-dividing unit for transmitting, at a level of the friction unit, only a proportional part of the load lifted by the lifting device.

Abstract: A pushing mechanism has a hollow slotted tube which receives radially extending pins of a threaded shaft. The tube is rotated by the rotor of a motor and is threadably received within an axially and rotationally fixed nut that is connected to a housing which, in turn, is fixed to the motor housing. Rotation of the shaft through the pins causes the shaft to move axially. An outer threadless end of the shaft extends beyond the housing for pushing outside mechanisms such as the stage of a microscope, a micro hardness tester or even a hydraulic cylinder.

Abstract: An adjustable setting block assembly is disclosed for supporting and leveling infill panels such as window panes and the like. The setting block assembly includes a setting block and a thrust plate positioned adjacent the lower surface of the block. A bolt is threadingly engaged within a threaded bore in the block, and the bolt has a tip which bears against the thrust plate as the bolt is advanced within the threaded bore. A load exerted on the upper surface of the block, such as by a glass light resting on the block, is thus supported by the tip of the bolt bearing against the thrust plate. In the disclosed embodiment the tip of the bolt which bears against the thrust plate is radiused to facilitate limited pivotable movement between the bolt and the thrust plate. Also in the disclosed embodiment a pad is imposed against the upper surface of the block to provide a cushioned surface for supporting the glass lite.

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 detached pin pulling accessory for removing pins locking a bogie to a trailer chassis. The puller is intended for use with a trailer having pin pulling equipment which is intended to be pulled by hand. The pin pulling equipment has a handle extending toward the side of the trailer, on which a pulling force is exerted by a first person while a second person rocks the trailer by moving the tractor. The inventive accessory clamps to the trailer and engages the pulling handle of the apparatus, and is self-supporting once these connections are made. An integral crank is wound, which places tension on a spring acting on the pulling handle. The spring maintains tension on the pin pulling equipment without requiring the first person to be present. Thus, releasing pins from a trailer is rendered a one-person task by the novel accessory. The novel accessory requires no external power, such as pneumatic or electrical, and is portable from vehicle to vehicle.

Abstract: For carrying out a method to displace an object from a resting position to to a working position or vice verse, a device (1) is arranged comprising a screw (3) with two threads (7, 9) with different pitches and a body (2, 4) with internal threads matching the threads of screw (3). The body is shaped in two parts (2) and (4), which are arranged to be able to be displaced relative to one another in the axial direction of the screw (3), whereby a changing from one thread to another thread can be done by changing the distance between said parts (2, 4) of the body. The screw (3) is arranged to a first object and the body (2, 4) to a second object.

Abstract: A jack mechanism having a crank handle that drives a linear motion control all nut and threaded screw. Two rods are included to provide a positive stop in each direction of the jack's limit so as to prevent overrun of the mechanism.

Abstract: An adjustable ceiling panel installer is provided which consists of a base frame member, with a plurality of wheels mounted to the underside of the base frame member, so as to make the base frame member maneuverable. A pair of stanchion assemblies are provided, with each mounted at a lower end to one end of the base frame member in an upright position. A mechanism varies the height of the stanchion assemblies relative to the base frame member. A ceiling panel support frame member is mounted at each end to an upper end of the stanchion assemblies. The proper operation of the varying height mechanism will raise a ceiling panel against ceiling rafters and hold it thereto, so that the ceiling panel can be nailed to the ceiling rafters by at least one person.

Abstract: An electro-mechanical-hydraulic drive mechanism (10) for moving a lead (11) relative to a support (12) includes an electric motor-driven element (14) and a hydraulic reaction element (15). The two elements are arranged mechanically in series between the lead and the support. The motor-driven element may be operated independently of the reaction element to move the lead relative to the support when the reaction element is held at a fixed displacement. The two elements may be operated cooperatively to move the load when the motor-driven element is operated at a controlled velocity to pressurize the reaction element, and the reaction element is operated by controlling its pressure.

Abstract: An extendible multi-frame stand includes at least three frames arranged in a telescoping relationship, having a single coherent alignment and locking mechanism which includes alignment means for preventing relative rotation between the first and second frames, alignment means for preventing relative rotation between the second and third frames, means for locking the second and third frames at the limits of their longitudinal extension positions, and cam-operated releasable locking means for controlling extension and retraction of the second and third frames relative to each other and to the first frame.

Abstract: A high/low screw jack stand mechanism is presented having inner and outer telescoping tubes for coarse elevational adjustment and having an adjustment screw and nut assembly for fine elevational adjustment. For coarse adjustment a thrust washer, surrounding the inner work elevation tube, permits free upward movement of the elevating tube relative to the outer support tube and is automatically positioned in angular binding relation with the elevating tube by a thrust washer positioner which has supporting engagement with one side of the thrust washer to restrain downward movement of the elevating tube. A thrust washer restraint member extends upwardly from and in spaced relation with the thrust washer positioner to restrain the thrust washer from moving upwardly along with the elevation tube.

Abstract: A plurality of telescoping tube members, each arranged for inter-locking relative to one another, are provided to include a threaded support rod threadedly directed within an uppermost of the tubes to position a pipe during a welding procedure. A modification of the invention includes support head structure arranged for mounting to the tube to accommodate various configurations of pipes.

Abstract: A temporary, self-leveling support device is provided having a screwjack body with a threaded hole formed centrally therein for engaging a threaded bolt. The bolt has a load bearing plate affixed thereon. The bolt can be rotated within the screwjack body to raise or lower the load bearing surface. The screwjack body has two opposed support legs pivotally attached thereto which extend down to form an A-frame support. The support legs have pivtotally mounted feet which can pivot to engage uneven surfaces thereby allowing the device to be self loading. The legs are secured to each other by an adjustable tie bar cross member which can be adjusted to increase or decrease the distance between the support legs and thereby adjust the overall height and base dimensions of the device.

Abstract: A material testing machine devised so as to be capable of complying with a long test piece without employing a long-sized screw columns. The machine consists essentially of a pair of intermediate rods rotatably installed on a table for being driven by a motor, a pair of screw columns screw-cut in the region corresponding to a possible elongation of a test piece and devised so as to be expandable with respect to and rotatable integrally with the pair of intermediate rods, holder means for rotatably holding the screw columns at any desired position of expansion, and a crosshead having both its ends screw-engaged with the pair of screw columns for being driven through the rotation of the screw columns to exert force on a test piece between the same and the table.

Abstract: The adjustable jack mechanism of this invention incorporates a base structure having a support tube, with a plurality of angulated leg supports projecting radially therefrom and which allow pivoting of the support legs to positions parallel with the support tube. A plurality of support legs are pivotally connected to the leg support elements and are stabilized relative to the support tube by a support ring and pivotal support links. An elevation tube is telescopically movable within the support tube and is selectively locked relative thereto by a primary lock including a locking ring that is angulated by an external locking element for frictional gripping relation with the elevation tube. A jack screw is telescopically positioned within the elevation tube and is vertically adjustable by rotation of an adjustment nut for raising or lowering an object support provided at the upper end thereof.

Abstract: For supporting of formwork in constructing buildings, use is made of steel post shores (props) having a pin with recessed areas thereon. When the prop has to be brought from the loaded to the unloaded position, such pin is changed of position in the prop so as to allow the inner tube to be lowered within the outer tube of the prop. The invention provides a new pin-design such that after assembling the prop it can be clearly seen whether the pin finds itself in the correct position or not. For that purpose, use is made of a pin having a recess and a flattened portion; by axial displacement of the pin this portion rests on a ring or on an inner tube under changing its angular position, which is well visible for the user. Alternatively a cylindrical pin may have two cams resting on a ring; by axially displacing this pin it will rotate over 90.degree. and the inner tube will be lowered in the outer tube, which position is clearly visible for the user.

Abstract: The deployment system comprises a plurality of parallel jack screws securely supported at their respective bases to a deployment portion of the spacecraft. The jack screws are rotatable with respect to that deployment portion. A synchronization chain is connected to the jack screws to insure precise timing between the screws. An electric motor provides rotation of the jack screws. A payload is provided having attach fittings located thereon for engagement with the jack screws. Prior to deployment, the payload is mounted to the jack screws. During deployment, synchronous rotation of the jack screws is provided allowing the payload to translate off the ends of the jack screws. Thus, the jack screws simultaneously serve as guides for the payload, providing a precise trajectory, and providing the driving force to eject the payload from the spacecraft.

Abstract: A concrete supporting bridge overhang bracket system which can be lifted and transferred in gang fashion from a first section of a bridge after it has been formed to a subsequent section. The system includes a series of longitudinally spaced apart laterally extending overhang brackets to which concrete forms are secured. A lift bracket assembly is attachable to a pair of overhang brackets and can be clamped to the deck to support the overhang brackets and the forms from the deck so that the brackets can be disconnected from the deck. Once disassembled, the lift bracket assembly can be supported by a crane and unclamped from the deck, the crane thereafter moving the lift bracket assembly, the overhang brackets and the forms to the subsequent section. Also disclosed is a pivotably adjustable edge form which permits the outer edge of the deck to be vertically inclined irrespective of the horizontal inclination of the deck.

Abstract: The apparatus described herein comprises a device for easily lifting and positioning a vehicle wheel, particularly to facilitate the lifting and positioning of a wheel for a truck or recreational vehicle onto the axle of the same and appropriately positioning the wheel for insertion of the lugs thereon. With the axle jacked to an appropriate raised position and the wheel resting on the ground next to the wheel base, two sections of the device are placed under the curvature of the wheel, a section on each side of the resting area and the sections connected to each other to prevent their separation during the lifting operation. Each section is adapted to perform an independent lifting operation on the wheel, the contact of each section with the wheel being by means of a cylindrical roller free to rotate on its axis. The joining section of the apparatus is positioned in front of the wheel and the rollers on which the wheel will rest extend under at least a substantial portion of the width of the wheel.

Abstract: The tool includes a base having an adjustment wedge, a counter wedge slidable on the inclined surface of the adjustment wedge, a plurality of roller bars in a recess on the upper surface of the counter wedge and a cover member supported by the roller bars. A power screw is used to horizontally displace the adjustment wedge to elevate the counter wedge, cover member and, hence, the load. The plurality of roller bars are confined within a recess to constrain relative movement of the cover member and the counter wedge. To release the cover member for movement, roller bars of reduced diameter at the opposite ends of the wedge are removed to permit the cover member to move relative to the counter wedge. Horizontal adjustment screws cooperate between the cover member and the base to precisely control the movement.

Abstract: A prop comprises a central screw (3) and a nut composed of two parts (6a, 6b) disposed in a head (5) turning on the end of the support tube (1). Said two nut parts (6a, 6b) are movable between a position of cooperation with the screw (3) and a position in which it is separated from the screw (3), under the control of arms (12a, 12b). A return spring (16) urges said nut parts (6a, 6b) towards their position of engagement with the screw. The flanks of the thread of the nut parts (6a, 6b) are symmetrical, while the external thread of the screw (3) has asymmetrical flanks, the bottom flank having a slighter slope, thus making it possible for the screw (3) to be pulled by hand into the top position without the nut parts (6a, 6b) preventing this. Safety hooks (9a, 9b) limit the axial movement of the head (5) relative to the tube (1). The large displacements of the screw (3) in both directions can be achieved without the nut having to be turned. Fine adjustment is made with minimum rotation of the head (5).

Abstract: A normally helically interacting shaft and nut assembly having a common longitudinal axis along which the nut is normally displaced linearly by rotation of the shaft is provided with a wedging surface in a passage, located by or in the nut, inclined at an angle to the longitudinal axis and facing into an aperture in the nut normally partially occupied by a threaded portion of the shaft; and a detent, such as a ball, in the passage. In the event of failure of the normal engagement between nut and shaft (such as can occur with the threads on the nut wearing) free relative linear motion of the nut relative to the threaded shaft causes the wedging surface to displace the detent towards, and into engagement with, the threaded shaft and thereafter maintain the detent in such engagement so as to inhibit further free linear motion by the nut relative to the shaft. At least a part of the nut engaging with the shaft can be of a self lubricating material such as a graphite loaded plastics material.

Abstract: An adjustable basketball backboard apparatus is set forth wherein an elongate slotted support secures a plurality of vertically positionable support arms therefrom which in turn secure a basketball backboard and net. The arms are integrally secured to a support cylinder which surroundingly encompasses a plurality of adjustment nuts threadedly positionable relative to a support rod rotatably mounted to adjust the basketball backboard assembly vertically upon rotation of the support rod.

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: A support system, which has support/brace units, for restraining the several mobile sections through their undercarriage I-beams of a mobile or manufactured home, against lateral movement during ground movement, tremors or vibrations. The support system includes a plurality or series of support/brace units, wherein each support unit comprises a pair of vertically adjustable piers clampingly interconnected to a horizontal tie-rod at the junction of two parallel and adjacent I-beams from separate mobile sections. In an alternative embodiment, a single tie-rod may unite two piers at their collars while the piers vertically support adjacently parallel I-beams.

Abstract: Translation nut for a lifting unit.Translation nut remarkable due to the combination of a sliding block (1) with a threaded tubular casing (19) on which it rests by means of a ball bearing (22), said bearing and, by support, the sliding block being selectively engaged by coupling and uncoupling means through an intermediary coaxial piece moving axially in movements of coupling and uncoupling under the effect of said coupling and uncoupling means.This invention is of value to manufacturers and assemblers of truck bodies.

Abstract: A cradle for an adjustable brace used for supporting an elevated concrete form floor between support beams during the curing of the concrete is provided. The cradle is adapted to receive the upper portion of two legs such that the legs can pivot towards and away from each other in a single plane, to enable the lower portion of the legs to be placed for support against opposing support beams positioned at varying distances from each other. The cradle is also adapted to receive and support a shoring member for suppoting the concrete form floor. The cradle may be adjustable for supporting shoring members at varying heights.

Abstract: This telescopic tube is formed of a first and of a second continuous bands wound in a spiral and in a helix, respectively, with the turns of each band lying flat against each other in the retracted position of the tube. The turns of the respective bands are normal to one another. To extend the tube, the turns of the first band are spaced from each other, and the turns of the second band are inserted between the spaced turns of the first band, so as to act as spacers for the latter turns. A mechanism is described to cause extension and retraction of the tube which is mainly used as a push actuator.

Abstract: A bus bar screw jack is useful in the removal, inspection, and reinstallation of bus bars. The end of the screw jack which engages the bus bar comprises a channel with a foam rubber coating to nonslidably receive the bus bar. The foam rubber coating also prevents damage to the insulating coating on the bus bar during installation. The screw jack comprises an externally threaded member, an internally threaded member threaded onto the externally threaded member, a support member on one end of the externally threaded member, and a washer interposed between the support member and internally threaded member.