| US 7,461,583 B2 | ||
| Variable tension ring mechanism | ||
| Joseph C. Hamelink, North Muskegan, Mich. (US); Jack W. Lewis, Walker, Mich. (US); and David R. Stamy, Twin Lake, Mich. (US) | ||
| Assigned to Mahle Engine Components USA, Inc., Muskegon, Mich. (US) | ||
| Filed on Jul. 21, 2006, as Appl. No. 11/459,188. | ||
| Prior Publication US 2008/0017025 A1, Jan. 24, 2008 | ||
| Int. Cl. F16J 1/06 (2006.01); F02B 75/00 (2006.01) | ||
| U.S. Cl. 92—201 [92/207; 277/470] | 19 Claims |
| 1. A piston assembly comprising:
a connecting rod;
a piston head in operational communication with said connecting rod, said piston head having a circumferential groove extending
inwardly from an exterior surface of said piston head, said piston head having a compression mechanism aperture disposed proximate
said groove;
an oil ring expander disposed generally within said groove, said expander including a gap between a first expander end and
a second expander end, said gap being proximate said compression mechanism aperture; and
at least one lever arm in mechanical communication with said connecting rod, said at least one lever arm having a tab disposed
between said first expander end and said second expander end;
wherein said at least one lever arm is pivotally secured to said piston head.
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