Abstract: An improved guide assembly, including a guide bearing and a pair of guide shoes, for a variable displacement wobble plate compressor is disclosed. The guide shoes include a body portion and positioning lugs that extend outwardly therefrom and arcuately around the guide bearing. The body portion engages the bearing and positioning lugs terminate in bearing edge surfaces. The lugs extend around the guide bearing such that said bearing surfaces are in close juxtaposition for load bearing contact. During operation, as compressor loading increases, the loading on the guide shoes from the wobble plate increases as well. This higher loading, and the tendency for uneven loading, brings the edge surfaces of the positioning lugs into load bearing contact. This serves to equalize the loading and substantially prevent relative guide shoe motion and frictional line contact with the guide rod. Thus, undesirable excess wear due to frictional contact of the guide shoes and the guide rod is avoided.

Abstract: A multicylinder refrigerant compressor is disclosed having double-ended pistons operating in aligned cylinder bores of a cylinder block to discharge refrigerant from the opposite ends thereof to discharge chambers formed in opposite ends of the compressor. A muffler arrangement is completely formed within the compressor and comprises a separate attenuation chamber ported at one of two opposing ends thereof directly to each discharge chamber. Each attenuation chamber is formed within and as an integral part of the cylinder block between two adjacent cylinder walls thereof and an elongated attenuation passage directly connects the attenuation chambers at their other end. The attenuation passage is also formed in and as an integral part of the cylinder block and extends between the two aforesaid adjacent cylinder walls.

Abstract: A compact lightweight multicylinder swash plate compressor is disclosed having a metallic double-ended piston with piston heads reciprocated in aligned metallic cylinder bores. Each piston head has a diametrical dimension substantially less than the diametrical dimension of its respective bore to provide a substantial annular space therebetween and a solid seal-support ring of slippery material is expanded over each piston head and contracts into a circumferential groove therein. Each ring is sufficiently thick that the memory recovery thereof after further contraction forced by a tool causes the ring to sealingly engage its respective bore immediately after assembly with its piston head therein. The metal of the piston head on opposite sides of the groove is thereby prevented from touching the metal of its respective bore throughout its reciprocation in the bore. Each ring groove is formed with a plurality of projections which are spaced about and project outward from the bottom thereof.

Abstract: A guide rod, with a ball on its free end, extends radially from a compressor wobble plate with the ball and rod being positioned for longitudinal and arcuate travel in a guide slot of the compressor housing as a result of the wobble plate movement. An improved pair of spaced guide shoe members are positioned in the slot on opposite sides of the ball with the shoe members having concave recesses on opposing surfaces for retaining the ball therebetween. Collar portions are integrally formed in opposed relation on the shoe members' radially inner ends, with each collar portion having a cylindrical surface positioned in conforming bearing contact with the guide rod permitting limited pivotal movement of the shoe members about the axis of the rod. The collars further provide additional bearing surfaces preventing the radially outer portions of the shoe members from being canted into non-parallel orientation and thereby minimize undesirable wear of the guide slot faces.