Gm Global Technolgoy Operations, Inc.

Ronald E Marker

Gary T Miller

Richard L Marker

Dwayne L Johnson

Daniel A Rhule

Mark J Bookbinder

Michael E Greene

Joseph A Untener

Edward R La Marca

Michael L Dees

A method of forming a composite piston assembly for an automotive air conditioning compressor includes providing 1018 steel alloy, solid connecting rod with an aluminum alloy head. An axial receiving bore is provided in the piston head, which is also fabricated of solid bar stock, and includes a frusto-conically-shaped counterbore. The connecting rod includes a positioning collar that defines a tenon received in said bore. A cold swaged tip of the connecting rod flares outward so as to conform to and fill the counterbore and provide a strong fixed attachment joint between the connecting rod and piston head.

Method for manufacturing a swaged piston assembly for an automotive air

The scroll compressor 10 includes a housing 12, a fixed scroll 18, an orbital scroll 24, an axial thrust and rotation prevention assembly 46, and an orbital scroll drive. The orbital scroll drive includes a crankshaft 74 rotatably journaled in the housing 12. The crankshaft includes an integral disk 76 and an eccentric crank pin 78 with a lubrication passage 96. An eccentric bushing 80 is journaled on the crank pin 78 and in a boss 82 on the orbital scroll by a needle bearing 81. An eccentric bushing retainer 102 has a shank portion 104 that is pressed into the lubrication passage 96 and an enlarged head portion 106 which holds the eccentric bushing 80 on the crank pin 78. If the eccentric bushing retainer 102 becomes partially unseated from the lubrication passage 96, the surface 114 on the enlarged head portion 106 will contact a surface 116 on the end plate 26 of the orbital scroll 24 and keep the eccentric bushing 80 properly positioned within the compressor housing 12. A passage 120 may be provided in the eccentric bushing retainer 102 to control lubrication of the eccentric bushing 80. The eccentric bushing retainer 102 can be made from plastics and other materials which will act as a bearing surface in the event contact is made with the surface 116 on the orbital scroll 24.

Scroll compressor eccentric bushing retainer

A swash plate compressor is disclosed having integral plastic ball and shoe parts with opposing working surfaces of equal area providing the drive between the opposite sides of the swash plate and the inner ends of double-ended pistons that straddle the plate.

Swash plate compressor having integral shoe and ball

A swash plate compressor is disclosed having integral plastic ball and shoe parts providing the drive between the opposite sides of the swash plate and the inner ends of double-ended pistons that straddle the plate.

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New Lebanon, OH, United States of America

Ronald E Marker