Abstract: A disjoinable assembly designed for connecting of piston with piston rod in ngines and machines, this assembly being particularly suitable for use in compressors, includes an insert [4] and a bolt connector [3] mounted in the said insert, said connector co-operating with piston rod [2]. The insert [4] is U-shaped in cross-section, it has preferably the form of a cylinder with bottom [8] at one end, said bottom having a hole [9], and it is provided with bearing surfaces [12] in the form of splineways [10] or splines [14] , said bearing surfaces [12] being matched with bearing surfaces [13] made in the form of splines [11] or splineways [15] on the piston rod [2] . The insert [4] is fixed in position relative to piston [1] and piston rod [2] by means of dogs [20] , said dogs being formed by bending the sections of rim [16] toward one or more sockets [6] made in piston [1] , and by bending the other sections of the said rim [16] toward one or more sockets [17] made in connector [3].

Abstract: A piston and rod assembly wherein the rod has a pair of axially spaced grooves and the piston includes recesses disposed in opposite faces. One of the grooves is radially larger than the other and locking members are disposed in the grooves of the rod and extend into the recesses. A retaining means including a snap ring and an annular ring which is L-shaped in cross section are disposed radially outwardly of the locking members in the first recess for removably retaining the locking members in the first recess. A pair of threaded screws may also threadedly interconnect the retaining ring and the piston.