Steering gear with pressure-balanced valve

Details Steering gear with pressure-balanced valve Steering gear with pressure-balanced valve

1989-02-27

1990-07-24

Garrett, Robert E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91375A, 13762524, B62D 5083

Patent

active

049428039

ABSTRACT:
A vehicle steering for turning the steerable wheels of a vehicle having a fluid motor with a housing defining a fluid chamber and a piston in the chamber dividing the chamber into first and second chamber portions. A rotatable steering input member is supported by the housing. A rotatable follow-up member is associated with the piston and rotatable upon movement of the piston in the chamber. A valve controls pressurized fluid flow to the first and second chamber portions. The valve comprises first and second relatively movable valve parts. One of the valve parts is connected with the input member and the other of the valve parts is connected with the follow-up member forming a unit therewith. The unit has a surface against which fluid pressure in the first and second chamber portions acts tending to create an axial force on the unit. Pressure is applied to another surface area of the unit to balance the axial force acting on the unit.

REFERENCES:
patent: 3461779 (1969-08-01), Jablonsky
patent: 3606819 (1971-09-01), Venable et al.
patent: 4028998 (1977-06-01), Jablonsky
patent: 4296673 (1981-10-01), Bacardit
patent: 4438679 (1984-03-01), Lang et al.
patent: 4459897 (1984-07-01), Bacardit
patent: 4625624 (1986-12-01), Adams
patent: 4671747 (1987-06-01), Arbjerg

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