Patent ID: 7338265

Claim:
A compressor comprising: a housing including a suction pressure region operating at a suction pressure and a housing discharge passage in communication with a discharge pressure region operating at a discharge pressure; a first scroll member supported within said housing and having a first end plate with a first spiral wrap extending therefrom and defining a scroll discharge passage therethrough; a second scroll member supported within said housing and having a second end pate with a second spiral wrap extending therefrom and meshingly engaged with said first spiral wrap to form a series of fluid pockets; a single piece floating seal plate formed as a unitary member and including a seal plate discharge passage extending therethrough providing communication between said scroll discharge passage in said first scroll member and said housing discharge passage in said housing, said floating seal plate disposed between said housing and said first end plate and being axially displaceable relative to said housing and said first end plate; an annular chamber exposed to an intermediate fluid pressure from one of said fluid pockets, said intermediate pressure being generally between said suction pressure and said discharge pressure; a first annular seal engaged with said first end plate and said single piece floating seal plate to isolate said annular chamber from communication with said discharge pressure region; a second annular seal disposed radially outwardly relative to said first annular seal and engaged with said first end plate and said single piece floating seal plate to isolate said annular chamber from communication with said suction pressure region; and a pressure responsive valve coupled to said single piece floating seal plate and configured to provide communication between said annular chamber and said suction pressure region when a discharge pressure within said discharge pressure region exceeds a predetermined limit.