Reciprocating machine component

摘要

A machine component includes an elongated base plate with side edges and a slide plate which is rectangular in cross-section and has parallel straight side edges. A cylinder and piston assembly are provided, one part of the assembly being supported from the base plate the other being connected to the slide plate. Two elongated guide members each have a rectangular slot which slidingly receives the edge of the slide plate. Each elongated guide member has a lower part and an upper part and fasteners securing them together. The lower part is attached to the base plate, and the rectangular slot has (1) a first side wall adjacent to and parallel with the base plate, the first side wall being defined by a surface of the lower part, (2) a second side wall defined by a surface of the upper part, and (3) a bottom wall defined by a surface of one of the upper and lower parts. The upper and lower parts have oblique mating surfaces such that longitudinal movement of one part with respect to the other causes the parts to separate from or approach each other in a manner to change the width of the slot.