Hydraulic lash adjuster for use in valve operating mechanism
US4807576A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1986 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Oct 15, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F2001/245
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A valve operating mechanism for operating a valve in an internal combustion engine includes a hydraulic lash adjuster for imposing a hydraulic pressure against a cam follower slidably engaging a camshaft. The hydraulic lash adjuster includes a plunger slidably disposed in a cylinder and defining an oil chamber communicating with a pressure chamber between the plunger and the cylinder through a valve hole which can selectively be opened and closed by a free-ball check valve. The plunger is normally urged by a spring to move in a direction out of the cylinder toward the cam follower. The cam follower acts on an end of the valve stem of the valve through an interlink mechanism having an adjusting device for adjusting the volume of the pressure chamber of the hydraulic lash adjuster.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.