Abstract: A method of supporting a workpiece on a fixture, the workpiece having a first surface and an opposite second surface, and an aperture positioned at a center of the first surface and extending from the first surface to the second surface the fixture having a first end, an opposite second end, and a center portion, the center portion comprising a supporting surface, the second end being adapted to be mounted in a lathe, the supporting surface comprising an annular recess, the annular recess accommodating a supporting medium, the second surface of the workpiece being in intimate contact with the supporting medium, the method comprising the steps of: (i) mounting the fixture in the lathe; (ii) locating the aperture on the first end of the fixture; and (iii) securing the workpiece on the fixture, with the second surface of the workpiece being coplanar with the supporting surface of the fixture.

Abstract: A quick release vise includes a first and second jaw moveable relative to the first jaw, and a threaded shaft rotatably fixed to the second jaw. A shaft receiver is fixed relative to the first jaw and includes a boss and a boss cover that is moveable relative to the boss. The boss and the boss cover have channels which cooperatively define an at least partially threaded shaft-receiving bore. The boss cover is moveable between a first position wherein the threads of the shaft engage threads within the shaft-receiving bore, and a second position wherein the threads of the shaft are disengaged from the threads within the shaft-receiving bore.

Abstract: A vise assembly includes a support rod standing on a base of a bench circular sawing machine, a first arm connected to the support rod and projecting frontward, a second arm of which a rear end portion is connected to a front end portion of the first arm in such a manner that the second arm is horizontally swingable and capable of being retained at any angular position, and a clamping rod disposed at a front end portion of the second arm, configured to be movable upward and downward, and capable of holding a workpiece placed in a cutting region. Optionally, the rear end portion of the second arm is movable upward and downward and capable of being retained at any vertical position.

Abstract: A quick release vise includes a first and second jaw moveable relative to the first jaw, and a threaded shaft rotatably fixed to the second jaw. A shaft receiver is fixed relative to the first jaw and includes a boss and a boss cover that is moveable relative to the boss. The boss and the boss cover have channels which cooperatively define an at least partially threaded shaft-receiving bore. The boss cover is moveable between a first position wherein the threads of the shaft engage threads within the shaft-receiving bore, and a second position wherein the threads of the shaft are disengaged from the threads within the shaft-receiving bore.

Abstract: Vice comprising a moveable jaw mounted on a screw-threaded main vice screw which is axially fixed but rotatable within said moveable jaw, a fixed jaw mounted on the main vice screw, the jaws being moveable toward or away from one another upon rotation of the main vice screw, the vice further comprising a screw-threaded quick release mechanism moveable between a closed position in which the screw-thread of the quick release mechanism engages the screw-thread of the main vice screw and an open position in which the screw-thread of the quick release mechanism is disengaged from the main vice screw enabling the main vice screw to be moved freely axially with respect to the fixed jaw, the movement between the closed and open positions being effected automatically upon rotation of the main vice screw.

Abstract: A pipe joint for first and second profile wall pipes of the type having generally concentric, spaced apart inner and outer walls, and a helical rib connecting the inner wall to the outer wall. The convolutions of the helical rib extend in multiple turns around the exterior of the inner wall and along the interior of the outer wall for substantially the entire length of the pipe. The pipe joint includes a first exposed portion of the rib of the first pipe, and a second exposed portion of the rib of the second pipe. The exposed helical rib of the first pipe is threadably interengaged with the exposed helical rib of the second pipe.

Abstract: A split nut assembly for mounting on a threaded stud or shaft without passing over the end of the stud or shaft. The assembly consists of a nut divided into two equal parts and a shell equally divided. The shell when assembled fits over the nut so that the assembly can be rotated and tightened together. In a separate embodiment, lock nut capability is provided by providing tapered surfaces on the shell and the nut to force the latter radially against the stud or shaft while the assembly is tightened in place. In another embodiment, a press fit arrangement is provided.