Valve device for engine
US5979384A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Dec 8, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M9/102
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A valve system for driving intake and exhaust valves of an engine has a roller shaft 9 mounted in a recess 5 of a rocker arm body 1 (or a tappet body 21) as a valve system body, a cylindrical bushing 3 rotatably supported by the roller shaft 9, and a roller 2 rotatably supported on the outer periphery of the bushing 3 and opposite a cam 11, in which a lubricating film A is provided on each of the surfaces of sliding contact of the bushing 3 with the roller shaft 9 and with the roller 2, so that the lubricating film A enables the valve system to act smoothly for a long term, without causing loss of the lubricating properties of the slide surfaces 12, 13 of the bushing 3, even in the state of undersupply of an lubricating oil that occurs at the initial stage of operation of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.