Patent ID: 6012911
Filing Date: 2000-01-11
Classification: F04C

Abstract:
A scroll-type compressor comprising a closed housing having a gas inlet and outlet; a support frame fixed in said closed housing; a scroll-type compressing mechanism which has a fixed scroll and an orbiting scroll disposed above said support frame and engaging with each other, wherein said fixed scroll is fastened to said support frame, said orbiting scroll is supported by and in slidable contact with said support frame, and said orbiting scroll comprises a boss; a rotating shaft which is disposed below said scroll-type compressing mechanism and extends upward by penetrating said support frame, said rotating shaft having an upper end and comprising an eccentric pin portion at said upper end; an eccentric bush mounted to said pin portion; a bearing that is carried by said boss and is in receipt of said eccentric bush; a motor for driving said orbiting scroll via said rotating shaft; and an oil pump provided at the lower end of said rotating shaft,said rotating shaft and said eccentric pin portion being formed with an oil supply hole, which communicates with said oil pump and is open at an upper end face of said eccentric pin portion, so that lubricating oil is provided through said oil supply hole in response to said oil pump being driven, andsaid eccentric bush comprises a circumferential side that contacts said bearing and an upper end face, wherein said upper end face comprises a flat outer peripheral portion that extends from and is contiguous with a length of said circumferential side and being positioned lower than said upper end face of said eccentric pin portion so as to collect at least some of the lubricating oil flowing out of said oil supply hole, wherein said outer peripheral portion is adjacent to an outer peripheral oil supply path that is defined at least between a portion of said bush and a portion of said bearing and that supplies lubricating oil to said bearing, whereby said outer peripheral portion at least partially forms a reservoir arranged to receive oil from said oil supply hole to thereby increase the supply of oil into said outer peripheral oil supply path.