Oil sealing structure for a hydraulic device for an automatic transmission
US5029685A · kind A · utility
17Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1989 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Jan 4, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0046
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Seal rings are set in oil grooves which are situated at both sides of two oil passages communicating two hydraulic actuators which operate oppositely. First and second seal rings oil-tightly seal between the first oil passage and sleeve, while third and fourth seal rings oil-tightly seal between the second oil passage and the sleeve. Accordingly even if oil flows oppositely in each of two oil passages due to the opposing motions of the two contiguous hydraulic actuators, not oil leakage occurs. Furthermore, a draining groove is situated between the oil grooves in which the second and third seal rings are installed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.