Hydraulic power steering gear with noise attenuation

Details Hydraulic power steering gear with noise attenuation Hydraulic power steering gear with noise attenuation

1992-10-27

1994-02-22

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

60384, 180141, F15B 910

Patent

active

052877922

ABSTRACT:
A hydraulic power steering apparatus (10) comprises a rotatable input member (31), a rotatable output member (130), and a housing supporting (11) the input member (31) and the output member (130) for rotation about an axis (45) relative to each other. A hydraulic control valve assembly (30) in the housing (11) includes a valve core (40), a valve sleeve (41) and a plurality of hydraulic seals (120-126) which block leakage of hydraulic fluid from the valve assembly (30). The hydraulic power steering apparatus (10) further includes an elastomeric damping ring (200) extending circumferentially between the valve core (40) and the valve sleeve (41). The elastomeric damping ring (200) damps vibrations of the valve core (40) relative to the valve sleeve (41), and thereby attenuates noise in the apparatus (10).

REFERENCES:
patent: 3022772 (1962-02-01), Zeigler et al.
patent: 3138069 (1964-06-01), Bishop
patent: 3991656 (1976-11-01), Miyata et al.
patent: 4189024 (1980-02-01), Jabonsky
patent: 4220072 (1980-09-01), Numazawa et al.
patent: 4561516 (1985-12-01), Bishop et al.
patent: 4570735 (1986-02-01), Duffy
patent: 4793433 (1988-12-01), Emori et al.
patent: 4942803 (1990-07-01), Rabe et al.
patent: 5058695 (1991-10-01), Terada
Science and Technology of Rubber, Frederick R. Eirich, Academic Press, New York, 1978, pp. 179-184.

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