Abstract: The compressor or similar machine has a first housing component which cooperates with two end members to form a first hollow space as well as a second housing component which cooperates with two end members to form a second hollow space. In addition, a one-piece rocking piston member extends through the two housing components. The piston member carries radially directed wings at one end which are received in the first hollow space while a cylindrical portion is received in the second hollow space for coupling with a crank arm mechanism. The hollow spaces are sealed off relative to each other by a sealing ring which is arranged on the piston member. The piston member is secured in place by a cover member which is bolted to one end member associated with the second housing component. Similar bolt secure the end members associated with the second housing component together.

Abstract: An arrangement for a compressor with oscillating piston wings has a series of mutually angularly displaced discharge slots arranged in a radially extending end wall between a working chamber of the machine and an oppositely disposed discharge chamber. The discharge slots are covered over by valve members of resilient nature. The valve members may be inserted in the end wall with an end groove in a recessed manner to engage a valve seat about each slot.