Abstract: A hydraulic valve normally mounted at a convenient level for manual operation on a machine can be operated by a person's foot as opposed to his hand. Towards this end, there are provided mounting means for mounting the valve in an upside down position at the same level together with an elongated tube extending from the normally existing manually operable portion of the valve vertically downwardly terminating short of the floor. A transverse foot pedal is pivoted to the machine frame at the level of the lower end of the tube, this lower end in turn being pivoted to the same foot pedal at a point spaced from the first pivoting point. The arrangement is such that rocking movement of the foot pedal will actuate the valve in the same manner as manual actuation when the valve was upright.

Abstract: Lower and upper split collars are positioned in engagement with the lower and upper cylindrical surfaces of a pipe and these collars in turn held in lower and upper clamp members. The exterior surfaces of the split collars in engagement with the interior surfaces of the clamp members have decreasing diameters from intermediate points towards opposite ends to define oppositely directed slopes. The interior engaging walls of the clamp members with the split collars are similarly tapered. When a pulling or pushing force is exerted on the pipe between the split collars, a camming action against the exterior walls of the collars is effected by the clamps urging the collars radially inwardly to more tightly grip the pipe so that the pipe is held from axial movement in either direction.

Abstract: The back shoe is made up of half block sections hinged together so that when in axial alignment, they function as a conventional back shoe on a tube bender. By hinging the two block halves, one half may be swung upwardly and over the other so that only one half the normal axial length of the cylindrical cavity engaging a side of a pipe results. As a consequence, it is possible to make a second bend in a tube close to a first bend without interference with the back shoe as would be the case were a back shoe of conventional length used. Essentially, the invention provides a single back shoe which serves a dual function so that labor time is saved in tube bending operations.

Abstract: An adapter member is arranged to be connected between a portion of a machine and a tool to enable quick attachment and removal of the tool to the machine. One end of the adapter member connects to the machine portion and the other end terminates in a reduced diameter section defining an annular shoulder. The tool itself is provided at one end with an entrance bore telescopically receivable over the reduced diameter section of the member so that the one end seats against the annular shoulder. The entrance bore to the tool includes a first axially directed camming surface which depresses the pin or projection when the tool is telescoped over the section. A crescent shaped groove within the bore in turn runs transversely to the axis of the bore and receives the pin or projection, the same snapping into this groove when the entrance bore is fully telescopically received over the reduced section.