Power steering assembly with damping ring
US5542343A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1995 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Sep 26, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86638
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic power rack and pinion steering assembly (10) includes a valve core (98) and a valve sleeve (100) which are supported for relative rotation. A damping ring assembly (150) is interposed between the valve parts (98, 100) to reduce vibrations and thereby to attenuate noise. The damping ring assembly (150) includes an inner ring (160) press fit on the valve core (98) and an outer ring (170) press fit in the valve sleeve (100). An elastomeric member (180) is disposed in the annulus between the inner ring (160) and the outer ring (170). The elastomeric member (180) is bonded to the inner ring (160). Ribs (210-216) on the inner ring (170) are received in grooves (270-276) in the elastomeric member (180). The ribs (210-216) sequentially engage the elastomeric member (180) upon incremental relative rotation between the valve parts (98, 100) to provide a damping effect which changes at an increasing rate as the valve parts move from the centered condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.