Patent ID: 7967583
Filing Date: 2011-06-28
Classification: F04C

Abstract:
1. A compressor comprising: a housing; a non-orbiting scroll member supported within said housing and including a first end plate and a first spiral wrap extending from said first end plate; an orbiting scroll member supported within said housing and including a second end plate having a second spiral wrap extending therefrom and meshingly engaged with said first spiral wrap to form a series of compression pockets; a first porting extending through said first end plate and located radially outward relative to a radially outer surface of said first spiral wrap at least five hundred and forty degrees inward along said first spiral wrap from an outer end thereof, said first porting being in communication with a first of said compression pockets during a portion of a compression cycle of said orbiting and non-orbiting scroll members, said first and second spiral wraps abutting one another to define first modulated capacity pockets when said orbiting scroll member is in a first position, said first modulated capacity pockets including a set of radially outermost compression pockets located radially inward relative to said first porting and isolated from communication with said first porting during an entirety of said compression cycle, said first porting aligned with said second spiral wrap at a location radially outward from and directly adjacent said first modulated capacity pockets when said orbiting scroll member is in the first position; and additional porting extending through said first end plate and in communication with each of said compression pockets located radially outward relative to said first modulated capacity pockets when said orbiting scroll member is in the first position.