Rocker arm
US7000582B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2002 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Oct 3, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2305/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The rocker arm 1 has a fitting surface 6 on the opposite sides of which guide surfaces 21 are formed, such that the guide surfaces 21 are inclined to be closer to each other toward their tip ends. Even when the valve stem 20 is displaced in the widthwise direction of the fitting surface 6, the outer peripheral surface of the base end portion of the valve stem 20 comes into contact with only the tip end of one of the guide surfaces 21. Consequently, lubrication is improved and friction moment is decreased in the contact area, so that friction resistance is suppressed between the guide surfaces 21 and the outer peripheral surface of the base end of the valve stem 20 to easily obtain high performance of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.