Patent ID: 6139291
Filing Date: 2000-10-31
Classification: F04C,Y10T

Abstract:
A scroll machine comprising:a shell defining a discharge chamber;a first scroll member disposed in said shell, said first member having a first spiral wrap projecting outwardly from an end plate;a second scroll member disposed in said shell, said second scroll member having a second spiral wrap projecting outwardly from an end plate, said second spiral wrap intermeshed with said first spiral wrap;a drive member for causing said scroll members to orbit relative to one another whereby said spiral wraps will create pockets of progressively changing volume between a suction pressure zone and a discharge pressure zone, said discharge pressure zone being in fluid communication with said discharge chamber;a discharge valve disposed between said discharge pressure zone and said discharge chamber, said discharge valve movable between an open position where fluid flow between said discharge pressure zone and said discharge chamber is permitted and a closed position where fluid flow between said discharge chamber and said discharge pressure zone is prohibited, said discharge valve comprising:a valve seat disposed within a recess defined by one of said first and second scroll members;a valve plate disposed within said recess adjacent said valve seat, said valve plate including a movable portion being movable between a position adjacent said valve seat to place said discharge valve in said closed position and a position spaced from said valve seat to place said discharge valve in said open position; anda valve stop disposed within said recess adjacent said valve plate, said valve stop defining a contoured surface for controlling said movement of said movable portion of said valve plate.