Abstract: A drive rod apparatus and method generates a drive feed which is dependent on the speed change of the load. The apparatus and method, which is preferably embodied in a lifting jack, includes a slidable drive screw and nut set.

Abstract: A hammer head for a hammer which includes a nail-holding part which allows a nail to be initially driven in a wall by a worker using only one hand. The nail-holding part includes a striking surface which engages the head of a nail and a pair of pinching pieces which engage opposite sides of the shank of the nail therebetween. The pair of pinching pieces permit nails of various diameters to be held therebetween and the pair of pinching pieces are disposed adjacent to the striking wall for tightly holding the nail with the head of the nail in tight engagement with the striking wall. A groove is provided in the hammer head at a location further from the striking wall than the pinching pieces for supporting the shank of the nail. The nail-holding part is disposed within a recess in the hammer head and does not interfere with the normal operation of the hammer head.

Abstract: The sawbuck includes a suitable frame for mounting a pair of opposed jaws for supporting logs or the like in cantilevered fashion at a convenient height above ground level. The upper jaw is pivotally movable to not only render it self-adjusting whereby to accommodate logs of different diameter, but also is self-locking to secure a log relative to the sawbuck.

Abstract: An opening device for an extension rod drilling equipment, comprising a supporting sleeve (3) rotatably mounted in a frame (1), and gripping jaws (6) displaceably mounted in the sleeve for gripping a drill rod. In order to allow the device to both grip the drill rod and rotate it, the supporting sleeve is connected to a rotating mechanism (14) and provided with cylindrical guideways (4, 5) positioned eccentrically with respect to the axis (A) of the sleeve in such a manner that a rotating movement of the sleeve with respect to the gripping jaws causes a displacement of the gripping jaws towards an aligned rod releasing position and away from the aligned position respectively, depending on the direction of rotation of the supporting sleeve.

Abstract: A simple and economical tire repair tool, providing an open-ended support tube which carries in the free end a plug member axially of the tube for sealing the hole. The plug member is provided on its forward end with a hard-material pointed member for penetration of the casing, and that pointed member has an abutment against which the free end of the support tube presses during use, forcing the pointed end and a plug body connected thereto to penetrate the tire casing, without need of enlarging the hole, and with the tube holding the casing walls away from the plug body. Interengaging lugs of the tube and the pointed end member provide for twisting the pointed member to facilitate passage of the pointed member into the casing, but permit simple axial retraction of the tube to draw it out of the casing, yet the resilience of the casing in the hole region causes the casing walls to firmly embrace the plug member, sealing the hole.

Abstract: An operating table intended specifically for microscopic lumbar laminectomy surgery by which the patient is properly positioned for the surgery in a matter of minutes, and which serves to hold the patient in the proper flexed position during the surgical procedure.

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

Abstract: A chuck includes a support and a plurality of pairs of oppositely disposed jaws with the jaws being movable to a position with each pair of jaws disposed on diametrically opposite sides of one element of an assembly. A motor moves selected pairs of the jaws into contact with the element and an additional motor moves the selected pairs of jaws and element away from the support to extract the element while at least one of the pairs of oppositely disposed jaws are maintained in position on the support to secure a second element of the assembly against movement while the selected pairs of jaws extract the one element.

Abstract: A vice jaw support apparatus provides a novel support system for securement of splined and threaded work pieces within vice grippers or jaws. In a preferred form, the apparatus is formed of a polyethylene or other similar resilient material. In a preferred form, the apparatus defines a pair of plastic bodies which are interconnected by integral web portions joining the two bodies on opposite sides. The web portions are disposed for deforming outwardly when the two body portions are moved towards each other within the vice jaws. Each body contains a flange portion whereby the apparatus may be supported on the upper surfaces of associated vice jaws.

Abstract: The present invention provides a spare tire apparatus for installation on a vehicle. The spare tire can be installed to a vehicle without the use of a conventional jack and can use the motion of the vehicle to secure itself to the vehicle. The inventive spare tire does not require removal of the flat tire which is attached with the vehicle.

Abstract: An alignment and assembly tool 10 is disclosed for aligning the ends of two very large cylinders 36 and 38 so that the ends may be welded together, with a cylindrical strengthening section (tee ring) 18 inserted between the cylinders and aligned and welded into the joint. The tool 10 has a U-shaped main body 11 with a horizontal top section 13 and two legs 15, which are attached to the ends of top section 13 and extend outward and downward. Horizontal bottom sections 12 extend outward from the bottoms 14 of legs 15. Tool 10 has one inner jackscrew 20 and one outer jackscrew 22 on each side of its center, extending downward from top section 13. Each of the two bottom sections 12 has an attached side clamp 24 for clamping the alignment tool 10 to two opposing skin stringers 26 of cylinders 36 and 38.

Abstract: A vehicle wheel offset wheel bracket assembly includes a platform with a jack receiving surface, and wheel rim engaging arms, connected to and extending upwardly and outwardly from the platform toward a wheel to be raised, for engaging an under surface of an upper part of a rim of a wheel to be raised. The platform projects in a direction away from the wheel and a restraining chain, connected to the platform and to the lower part of the wheel keeps the platform from moving outwardly away from the wheel when a jack is raised against the platform.

Abstract: A shielding or masking device for use in conjunction with an X-ray radiation generating source comprised of radiopaque material having a vertically oriented opening having a broader portion twice the width of the upper, narrower portion nearer its distal or lower end to block entirely or confine radiation dosage to a specific area of a subject under observation or inspection and to prevent unnecessary and excessive radiation dosages to the subject during full spine radiographs.

Abstract: A machine for extracting an elongate work piece from a medium in which it is imbedded. The machine includes a vertical gripping plate in opposed gripping relating with an eccentrically pivoted gripper. These gripping elements are carried on a rigid frame adapted for attachment to the three point hitch lifting mechanism found on tractors. When the work piece is gripped between the gripping elements, lifting of the frame by means of the lifting mechanism of the tractor, will extract the work piece. Auxiliary lifting force may be provided with optional fluid power operated cylinders. Linkages may optionally be provided to remotely move the pivoted gripper into and out of gripping relation. The linkages may be operated manually or with a hydraulic or other power operated cylinder.

Abstract: An automatic compressor-jack device which comprises an air compressor, a hydraulic jack and a transmission mechanism. The transmission mechanism, which is driven by a motor through a reduction gear, comprises an eccentrically disposed pin to connect to the piston rods of the cylinders of the compressor and the jack. Therefore, when the motor rotates, the transmission mechanism drives the air compressor and jack at the same time. That is, this one device allows the user two tire repair functions.

Abstract: A workholder for holding a plurality of substrates, the workholder configured in a flat plate having a top surface and a bottom surface which is parallel to the top surface. The top surface spaced a distance from the bottom surface, such that the distance between the top surface and the bottom surface does not exceed a distance between an upper surface and a lower surface of an individual substrate. A plurality of substrate receiving openings extend through the plate, each opening being dimensioned to receive a respective substrate therein. A biasing spring means adjacent to each opening for biasing a substrate in the opening. The biasing spring means being between the top and bottom surfaces of the workholder and not extending beyond the top and bottom surfaces thereof. The configuration of the workholder allows the substrates to be held in the openings of the workholder, while having their upper and lower surfaces projecting beyond the top and bottom surfaces of the workholder respectively.

Abstract: A workpiece clamping device with a movable clamp member actuated by a jack screw driven by a reversible electric motor through a worm meshing with a gear connected to the jack screw. To yieldably bias the clamp member into engagement with the workpiece, a spring is compressed by axial movement of the worm caused by rotating it after the clamp member is forced into engagement with the workpiece by the jack screw.

Abstract: A clamping device, for use for example for clamping a tool or workpiece in position in a machine tool comprises a clamping anchor to which a clamping force is applied by a hydraulically operated cylinder. The device also includes a screw operated compensating or back-up unit which acts on the piston of the hydraulic cylinder. The compensating unit is driven by the same hydraulic system as the hydraulic cylinder and when the piston has been moved hydraulically to apply the clamping force to the anchor, a screw component of the compensating unit moves into engagement with the piston to lock the piston in position and maintain the clamping force even if the hydraulic pressure on the piston is then released.

Abstract: An apparatus for securing a sheet material under suction, the apparatus comprising: a face plate including a number of pores adapted to allow air to pass through, a base plate including outlet ports, corrugated plate interlocated between the face plate and the base plate, the corrugated plate including hill portions and valley portions alternately produced, each hill portion and valley portion taking the form of rectangles produced concentrically of the base plate, the corrugated plate further including inlet grooves between one hill portion and the next, and outlet grooves between one valley portion and the next, each outlet groove including one outlet port in the base plate, the inlet grooves and the outlet grooves being communicated with each other through a port produced in the partition wherein the port is located at a point distant from the outlet ports.

Abstract: A wrench adjustable for use with various size workpieces is disclosed. The wrench has a rearward gripping portion and a forward portion being integral therewith. The forward portion has a slot formed laterally therethrough and further has an aperture including a gripping portion formed therethrough. A wrench plate is rotatably received in the slot. This wrench plate includes a periphery having a plurality of notches formed therein. Each of said notches may be selectively positioned in communication with the aperture, whereby the workpiece may be disposed between the gripping portion of the aperture and a selective notch of the wrench plate where it is gripped for the tightening or removal thereof. If desired, a detent member is also provided for maintaining the wrench plate in a stationary position during the use thereof.