Piston seal with distortable ribs

Claim 1

A resilient integral piston seal ring for use in a channel of predetermined dimensions, with respect to said seal ring, in a piston means within a cylinder, a. the seal ring comprising a body of substantially rectangular cross section and substantially similar outer and inner walls, one flat sidewall and a bifurcated concentric flange means extending from the other opposite sidewall; b. said flange means comprising a pair of substantially similar spaced apart opposed concentric continuous flanges having opposed inner surfaces extending laterally outwardly from said other sidewall and providing a space open to the atmosphere therebetween; c. a substantially similar secondary continuous flange projecting outwardly of each inner surface of said flanges facing each other and extending into but not closing the said space open to the atmosphere; d. the seal ring body having a deep enlarged annular recess therein enlarged in cross section in respect to and in communication with said continuous space between the flanges; e. the body of the seal ring and its flanges both having similar outer and inner surfaces with similar sealing means thereon and extending outwardly and inwardly respectively from the inner and outer surfaces to seal adjacent inner portions of the cylinder and adjacent portions of the bottom wall of the channel respectively; and f. the inner opposed surface portion of each flange having opposed continuous secondary iNwardly projecting substantially similar flanges thereon serving to maintain the desired resiliency, tension and shape of the seal ring.