Piston and multilayer piston ring set
OwnerRobert Geffroy, Christophe Geoffroy +1inventors
InventorsRobert Geffroy, Christophe Geoffroy, Lloyd M. Forster
Life of this patent
Estimating the term…
Abstract
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.
Claims18
An assembly comprising a cylinder for internal combustion engine or compressor extending between a compression head and a crank case, a piston, and piston ring set reciprocable within said cylinder characterized by a single pair of contiguous layers, each equally circumferentially segmented in equal circular arc segments providing metal compression ring means in a single piston groove with free axial clearance, each segment being provided with free form circumferential curvature substantially equal to said cylinder wall, further characterized by said pair of segmented metal ring layers within said single groove having interlayer sealing means against blowby, and resilient means for maintaining light dual layer radial ring segment contact pressure against each cylinder wall.
Dependencies are inferred from the claim text.