Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1987-07-15
1989-10-10
Garrett, Robert E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91399, 13762523, F15B 910
Patent
active
048723932
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: 3939757 (1976-02-01), Jablonsky
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: 4671747 (1987-06-01), Arbjerg
Gilbert Wendell L.
Rabe William T.
Garrett Robert E.
TRW Inc.
Williamson Mark A.
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