Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1995-09-26
1996-08-06
Nguyen, Hoang
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
13762521, 180441, F15B 910, B62D 506
Patent
active
055423434
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.
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patent: 5272933 (1993-12-01), Collier et al.
patent: 5287792 (1994-02-01), Betros et al.
Nguyen Hoang
TRW Inc.
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