Antirotation structure for combined oil ring
US5651553A · kind A · utility
6Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1996 |
| Grant date | Jul 29, 1997 |
| Priority date | — |
| Expiry date | Apr 18, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A combined oil ring comprises an oil ring and a coil expander. A curved bar passes through paired end portions of the coil expander. An antirotation member comprises a portion to be inserted into a hole and a portion to be held. Two mutually parallel surfaces of the portion to be held are held between paired end surfaces of the coil expander while the portion to be inserted into a hole is inserted into an antirotation member securing hole formed at the bottom surface of an oil ring groove of a piston. The curved bar passes through a curved bar insertion hole formed in the portion of the antirotation member to be held.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.