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US 4,497,615 AGranted
Scroll-type machine
AssigneeCopeland Corporation
InventorRussell W. Griffith
Life of this patent
Estimating the term…
Abstract
There is disclosed a scroll-type machine specifically suited for use as a gaseous fluid compressor. The machine has intermediate relief valve means providing variable pressure ratio characteristics to thereby improve efficiency, as well as protect against overcompression.
Claims10
A scroll member suitable for constructing a scroll apparatus, comprising:
- (a) an end plate having a generally flat sealing surface;
- (b) a spiral wrap having a beginning and an end and being attached to said end plate and projecting outwardly from said sealing surface;
- (c) a valve port extending through said end plate intermediate of said beginning and said end of said spiral wrap, said port being generally kidney shaped in plan,
- one edge of said port lying immediately adjacent said wrap and being similar in shape thereto in plan;
- and
- (d) a pressure responsive valve disposed in said valve port, said valve being generally kidney shaped in plane and substantially flush with said sealing surface.
3 more elements
Dependencies are inferred from the claim text.