Power steering control valve

Details Power steering control valve Power steering control valve

1996-02-28

1997-07-22

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

056494670

ABSTRACT:
A power steering control valve (10) includes inner and outer valve members (30 and 32) which are rotatable relative to each other to control fluid flow to and from a power steering motor. A spring assembly (50) interconnects the inner and outer valve members (30 and 32). The spring assembly (50) includes a torsion bar (64) and a body (66) of viscoelastic material. A housing (68) encloses the body (66) of viscoelastic material and a portion of the torsion bar. The body (66) of viscoelastic material is bonded to an inner side surface (88) of the housing (68) and to an outer side surface (82) of the torsion bar (64). The body (66) of viscoelastic material damps vibratory movement between the inner and outer valve members (30 and 32).

REFERENCES:
patent: 4322062 (1982-03-01), Aleck
patent: 4346205 (1982-08-01), Hiles
patent: 4481866 (1984-11-01), Matouka
patent: 4808469 (1989-02-01), Hiles
patent: 5287792 (1994-02-01), Betros et al.
Publication entitled "Sorbothane-the Ultimate Damping & Isolation Material" .

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