Patent ID: 7918658

Claim:
A scroll compressor, comprising: an outer housing having an inlet port and an outlet port; scroll compressor bodies disposed within the outer housing and including a first scroll body and a second scroll body, the first and second scroll bodies having respective bases and respective scroll ribs that project from the respective bases and which mutually engage, the scroll ribs generally surrounding a central axis, wherein the scroll bodies are moveable relative to one another along first and second lateral axes, the first and second lateral axes being mutually perpendicular; a drive unit configured to provide a rotational output on a shaft, the shaft operatively driving one of the scroll compressor bodies to facilitate relative movement between the scroll compressor bodies for the compression of fluid; a key coupler acting upon the second scroll body, the second scroll body being movable relative to the key coupler along the second lateral axis; and a nonsymmetrical cooperating sliding contact arrangement between the key coupler and the second scroll compressor body, including first and second sliding contacts that are arranged in opposing relation, wherein a smaller running clearance is provided along the first sliding contact as compared to the second sliding contact, the running clearances being defined by the minimum distance between the key coupler and the second scroll compressor body along the first and second sliding contacts such that the running clearances are configured to prevent rotational backlash.