Steering apparatus
US5303793A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1992 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Jun 26, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D1/166
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A power steering apparatus of rack-and-pinion type comprising an input shaft steered by a driver, an output shaft operatively connected to a rack bar through a rack-and-pinion gear mechanism, a hydraulic cylinder operatively connected to the rack bar, and a rotary valve operatively connected to the input shaft. The steering apparatus further comprises an intermediate rotary member disposed between the input shaft and output shaft for rotation about an axis offset from the rotational axis of the output shaft, and a reduction gear mechanism arranged between the rotary valve and the intermediate rotary member. A cam mechanism is disposed between the intermediate rotary member and the output shaft for transmitting the rotation of the intermediate rotary member to the output shaft. The cam mechanism is composed of a cam groove formed on one of the intermediate rotary member and output shaft, and a follower roller provided on the other of the intermediate rotary member and output shaft to be engaged with the cam groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.