Piston ring of "Y" cross-section
AssigneeDana Corporation
InventorsRodney C. Hinshaw, William E. Martus
Life of this patent
Estimating the term…
Abstract
A piston ring having a "Y" cross section is received within an annular groove of a piston which is reciprocable within a cylinder. The piston ring is formed from a single strip of material with an integral inner end. Two flanges extend laterally outwardly in opposed directions from an outer edge of the central leg. An outer end of each flange is yieldably urged against the wall of the cylinder to sealing engage the piston within the cylinder and force two circumferential ends of the ring into abutting engagement. The groove includes a radially inwardly extending portion to receive the central leg portion and a "V" shaped portion with inclined walls which each underlie one of the flanges.
Claims15
A piston ring comprising:
- a single strip of metal formed into a split annular ring having two circumferential ends and a central leg, said leg being integral at an inner end;
- two flanges extending laterally outwardly from an outer edge of said central leg, said flanges extending at angles in opposed directions from each other and configured such that said flanges extend to a radial position intended to be greater than a radial dimension of an inner peripheral surface of a cylinder that is to receive said piston ring to force said circumferential ends into abutting engagement in an assembled orientation to make said ring contiguous and eliminate a path for escaping gases by a total circumferential contact between said ring and the surface of the cylinder.
An assembly comprising:
- a cylinder having an inner peripheral surface defining a bore;
- an annular piston reciprocable within said bore, said piston including an annular groove disposed about an outer peripheral surface;
- and
- a one-piece sealing member mounted in said groove to provide sealing engagement between said piston and said bore, said sealing member being formed from a single strip of metal and comprising a central leg formed by two overlapping portions and a flange extending laterally outwardly from each of said overlapping portions with an outer end of each said flange being in sealing engagement with said bore, said groove including a radially inwardly extending portion to receive said central leg and a radially outwardly extending "V" shaped portion with two inclined surfaces to each underlie one of said flanges, said central leg having a greater thickness at a radially inner end because of said overlapping portions being coiled at said inner end to provide a closer fit between said central leg and said groove to inhibit gases from passing between said central leg and said groove.
Dependencies are inferred from the claim text.