Camshaft phase change device
US5337711A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1993 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Aug 5, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D3/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Devices (10,110,150,200 and 250) include roller clutches for controlling rotational phase change of a camshaft between full advance and full retard positions and positions therebetween. Each of the devices includes sets of selectively operative rollers such as a set of rollers (36) for preventing phase retard and a set of rollers (34) for preventing phase advance. Devices (10,110,150 and 200) have pairs of rollers 36,34 acted on respectively by ramp surfaces (32d,32c) defined by a common flat surface. An annular member (32) defining ramp surface (32d,32c) is mounted with free play relative to an axis of the camshaft. Device (110) includes a splitter spring (112). Devices 150 and 200 include internal actuators (152,202).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.