Oiltight hydraulic tappet for controlling an internal combustion engine valve
US4649875A · kind A · utility
6Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Nov 25, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2309/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The hydraulic tappet comprises a cup-shaped body having a cylindrical side wall and a flat bottom wall, a piston element moving axially inside a cavity, formed in the said bottom wall and defining a first pressure chamber, an annular element of deformable material located on the outside of the said piston element and inside the said cylindrical wall, ducts for hydraulically connecting the said second chamber to the said first chamber and on which is fitted an on-off member, and a guide element moving axially inside the said cylindrical wall on the said cup-shaped body and having a side surface and a bottom wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.