Patent ID: 8287257

Claim:
A rotary compressor comprising: a housing including a fluid inlet and a fluid outlet; a first scroll member within the housing and positioned between the fluid inlet and the fluid outlet; a second scroll member within the housing, positioned between the fluid inlet and the fluid outlet, and in meshing engagement with the first scroll member to compress a fluid from a first pressure in the inlet to a second higher pressure at the outlet; and an Oldham coupling positioned within the housing and coupled to the second scroll member to inhibit the relative rotational movement between the first scroll member and the second scroll member, the Oldham coupling including: an annular ring including an upper surface, a lower surface, a first arc segment, a second arc segment, a first outwardly projecting flange portion extending out from the second arc segment, and a second outwardly projecting flange portion extending out from the second arc segment; a first key positioned on the upper surface and centered with respect to the first arc segment; a second key positioned on the upper surface and centered with respect to the second arc segment; a third key positioned on the upper surface of the first outwardly projecting flange portion; a fourth key positioned on the upper surface of the second outwardly projecting flange portion; a first riding pad positioned on the upper surface and adjacent the first key; a second riding pad positioned on the upper surface and adjacent the third key; a third riding pad positioned on the lower surface and adjacent the third key; and a fourth riding pad positioned on the lower surface and adjacent the first key such that the first riding pad and the fourth riding pad are in an overlapping arrangement.