Patent ID: 6082495
Filing Date: 2000-07-04
Classification: F04C,Y10S,Y10T

Abstract:
A scroll-type machine comprising:a hermetic shell having an oil sump in a lower portion thereof;a first scroll member having an end plate and a first spiral wrap upstanding therefrom;a second scroll member having an end plate and a second spiral wrap upstanding therefrom, said first and second spiral wraps being interleaved to define a plurality of moving fluid pockets of changing volume;a main bearing housing supported by said shell and having a bearing surface;a drive shaft rotatably supported by said bearing surface of said main bearing housing;a bushing provided on one end of said drive shaft, said bushing coupling said drive shaft to said second scroll members wherein said second scroll member is driven in relative orbital movement with respect to said first scroll member;said drive shaft including an oil pump and passage means for directing oil from said sump to said bearing surface and said bushing;said bushing being impregnated with a liquid lubricant, said liquid lubricant being operative to lubricate said bushing when the operating temperature of said bushing exceeds a normal operating temperature.