Valve timing control device
US5937810A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1996 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Dec 2, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2275/18
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A valve timing control device includes a rotor fixed on a cam shaft, a housing member rotatably mounted on the cam shaft so as to surround the rotor, a chamber defined between the housing member and the rotor and having a pair of circumferentially opposed walls, a vane mounted on the rotor and extended outwardly therefrom in the radial direction into the chambers so as to divide each of chambers into a first pressure chamber and a second pressure chamber, a fluid supplying device for supplying fluid under pressure to at least a selected one of the first pressure chamber and the second pressure chamber, and a concave portion formed on the radially outer ends of the opposed walls of the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.