F - Mech Eng,Light,Heat,Weapons – 01 – C
Patent
F - Mech Eng,Light,Heat,Weapons
01
C
103/17, 230/37
F01C 1/02 (2006.01) F01C 21/00 (2006.01) F16C 19/10 (2006.01) F04C 23/00 (2006.01)
Patent
CA 1203786
Abstract A rolling thrust bearing for use in a scroll type positive fluid displacement apparatus is disclosed. In the invention, a plurality of ball bearings spaced apart in cavities formed in a bearing cage are operative to transmit an axial force between a supporting frame and an orbiting scroll member. The bearing cage rotates within a groove in which it is seated due to frictional forces between its flank surfaces and the sides of the groove. In a first em- bodiment, the diameter of the cavities is substantially larger than the diameter of the ball bearings, and the bear- ings are free to orbit within the cavities as the bearing cage rotates. In the second embodiment, the cavities are only slightly larger in diameter than the ball bearings, but the radial width of the bearing cage is substantially less than the width of the groove, and the bearing cage and the ball bearings together describe an epicycloidal path about the central axis of the bearing cage. In both embodi- ments, the ball bearings seated within the cavities contact adjacent bearing races over a constantly changing portion of their surface. This substantially extends the oper- ational life of the thrust bearings.
416374
Butterworth Arthur L.
Eber David H.
American Standard International Inc.
Fetherstonhaugh & Co.
Trane Canada Inc.
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