| US 7,429,048 B1 | ||
| Piston ring with projection | ||
| Michael E. Carson, Muskegon, Mich. (US) | ||
| Assigned to Mahle Engine Components USA, Inc., Muskegon, Mich. (US) | ||
| Filed on Nov. 20, 2003, as Appl. No. 10/707,099. | ||
| Int. Cl. F16J 9/00 (2006.01) | ||
| U.S. Cl. 277—460 [277/459; 277/434] | 8 Claims |
| 1. A piston ring disposed in a ring groove of a piston and surrounded by a wall of a cylinder for use with a combustion chamber,
the piston ring comprising:
a generally annular body having generally parallel upper and lower surfaces disposed between inner and outer peripheral faces,
the outer peripheral face being generally tapered to an edge such that the edge contacts the wall of the cylinder and defining
a gap between the outer peripheral face and the wall; and
a projection extending radially outwardly from the outer peripheral face to reduce the gap between the outer peripheral face
and the wall, the projection thereby reducing exposure of the outer peripheral face to the combustion chamber, the lower surface
further including a generally hook-shaped groove and the outer peripheral face defining the edge, wherein the edge extends
radially outwardly farther than the projection;
wherein the projection includes an outer surface substantially parallel to the wall of the cylinder.
|