James P Rawlins

US Patent:

42892643, Sep 15, 1981

Filed:

Mar 23, 1979

Appl. No.:

6/023416

Inventors:

James J. Rawlins - Palm Beach Gardens FL

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

F16K 4100

US Classification:

277 27

Abstract:

A piston ring which provides uniform circumferential pressure loading on the ring. The ring has two protrusions, and an optional third protrusion, which give full and uniform sealing contact between the ring, and a complementary peripheral groove in an associated piston, or housing, and a complementary cylinder movable wall, or sleeve, so that minimum pressure balance is sacrificed irrespective of any movement of the cylinder wall.