Scroll compressor with rotary discharge valve

A scroll compressor comprising:

• an orbiting scroll member having an orbiting end plate and an orbiting spiral wrap extending from said orbiting end plate;
• a non-orbiting scroll member having a non-orbiting end plate, a non-orbiting spiral wrap extending from said non-orbiting end plate, and a discharge slot, said non-orbiting spiral wrap being intermeshed with said orbiting spiral wrap to create pockets of progressively changing volume between a suction pressure zone and a discharge pressure zone;
• a bearing housing extending from said non-orbiting end plate;
• a drive member for causing said orbiting scroll member to orbit relative to said non-orbiting scroll member to compress a fluid within said pockets, said drive member extending through said bearing housing, said non-orbiting scroll member, and said orbiting scroll member;
• and
• a discharge valve rotatable with said drive member and operable between a closed state preventing fluid communication between said pockets and said discharge slot and an open state permitting fluid communication between said pockets and said discharge slot.