Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1976-12-22
1979-08-21
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91536, F15B 910
Patent
active
041648927
ABSTRACT:
An improved control apparatus is utilized in a vehicle which has a single pump for supplying fluid to effect turning movement of steerable wheels and operation of an auxiliary apparatus. The control apparatus includes a housing in which a piston is movable in a cylinder under the influence of fluid pressure to effect turning movement of the steerable wheels. A valve assembly is disposed in the same housing. The valve assembly is operable between an unactuated condition in which fluid flow from a pump is directed to the auxiliary apparatus and either one of two actuated conditions in which fluid flow from the pump is directed to an end portion of the cylinder to effect movement of the piston and turning of the vehicle wheels. The valve assembly includes a rotatable sleeve member which is disposed in the valve chamber and defines a plurality of ports disposed in a circular array. A rotatable valve member is disposed within the sleeve member and cooperates with the circular array of ports to direct fluid under pressure from the pump to either the auxiliary apparatus or to the cylinder in which the piston is disposed to effect turning movement of the vehicle wheels.
REFERENCES:
patent: 2853102 (1958-09-01), Walker
patent: 2910971 (1959-11-01), MacDuff
patent: 3465842 (1969-09-01), Hruska
patent: 3834278 (1974-09-01), Gaff et al.
patent: 3996838 (1976-12-01), Goff
Goff Raymon L.
Rau Jim L.
Maslousky Paul E.
TRW Inc.
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