Power steering gear for motor vehicle

Details Power steering gear for motor vehicle Power steering gear for motor vehicle

1994-12-14

1996-02-20

Hill, Mitchell J.

Motor vehicles

Compensating devices

91372, 91375A, 180143, 180DIG7, 180DIG18, B62D 522

Patent

active

054921910

ABSTRACT:
A variable effort power steering gear including a control valve substantially as described in U.S. Pat. No. 4,454,801, an electromagnetic apparatus substantially as described in U.S. Pat. No. 5,119,898 for varying the effective centering force of a torsion bar of the control valve, and a support means for a tubular spool shaft of the steering gear relative to a pinion head of the steering gear which affords the spool shaft a degree of freedom relative to the pinion head perpendicular to a lateral centerline defined by a pair of radially oriented pins connecting a valve body of the control valve to the pinion head to prevent binding between the valve body and a valve spool on the spool shaft. In a preferred embodiment, the support means includes a cylindrical journal on the torsion bar and a bushing on the spool shaft at the inboard end thereof having an elongated bore therein around the cylindrical journal with a short dimension in the direction of the lateral centerline generally equal to the diameter of the cylindrical journal and a long dimension exceeding and perpendicular to the short dimension.

REFERENCES:
patent: 3406773 (1968-10-01), Luther
patent: 3998131 (1976-12-01), Adams
patent: 4034825 (1977-07-01), Adams
patent: 4454801 (1984-06-01), Spann
patent: 4819545 (1989-04-01), Dymond
patent: 5119898 (1992-06-01), Eckhardt et al.
patent: 5230273 (1993-07-01), Fraley, Jr.

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