Scroll compressor with oil feeding passages in thrust bearing

Claim 1

A scroll type compressor which comprises in combination: a bearing support having guide grooves extending in the diametral direction and an oil returning passage opening in the axial direction; a stationary scroll member having a spiral wrap and fixed on said bearing support; an orbiting scroll member having a spiral wrap which is combined with the spiral wrap of said stationary scroll member and guide grooves extending in the direction perpendicular to the direction of extension of said guide grooves of said bearing support; an annular thrust bearing interposed between said orbiting scroll member and said bearing support, and having a multitude of oil feeding passages, each communicatively connected with said oil returning passage; and an Oldham coupling disposed on and around said thrust bearing and having claws which slide in and along said both guide grooves, wherein each said oil feeding passage is so formed as to have a terminal part within a plane of said thrust bearing, and a substantially circumferentially extending part of the passage is made to open at a position where it is intermittently communicating with said guide groove of said orbiting scroll member.