Compression piston ring for internal combustion or compressor cylinder and piston comprising double layer of segmented ring sectors having free form circumferential curvature matching the cylinder bore. The double layers are adapted to effectively seal or minimize bypass with resilient means provided for maintaining ring cylinder engagement under light radial pressure.
申请公布号
US4986168(A)
申请公布日期
1991.01.22
申请号
US19890293072
申请日期
1989.01.03
申请人
GEFFROY, ROBERT;GEOFFROY, CHRISTOPHE;FORSTER, LLOYD M.
发明人
GEFFROY, ROBERT;GEOFFROY, CHRISTOPHE;FORSTER, LLOYD M.