Oiltight hydraulic tappet for controlling an internal combustion engine valve
US4640238A · kind A · utility
3Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1985 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Jul 8, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2309/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Hydraulic tappet comprising a cup member, the latter sliding in a seat and housing a second cup member sliding in relation to the first in such a manner as to form a first chamber, and a flexible annular member located essentially inside the said second cup member in such a manner as to form a fluidtight second chamber connected hydraulically to the said first chamber; the said two chambers being filled with activating fluid the flow of which from the said second to the said first chamber being controlled by an on-off member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.