Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1974-06-26
1976-09-07
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
91436, 91446, 137491, 137493, 13759612, B62D 508
Patent
active
039788792
ABSTRACT:
The invention relates to a control valve assembly for a hydrostatic control system such as power steering assembly. A common control valve assembly of this type has relatively rotatable inner and outer elements connected respectively to a vehicle steering wheel and a servomotor. Paired holes in the inner and outer element permit the flow of fluid therethrough when the unit is in its neutral position with the paired holes in respective registration. In hydrostatic steering system of this type impact is sometimes applied to the steering wheel when the working motor connected to the steered wheels is suddenly loaded, e.g. when the wheels strike a stone. Such impacts on the steering wheel are avoided by providing a one-way valve in a section of the working path through which fluid flows to the working motor. Pressure regulating valve means, excess pressure valve means and emergency control valve means are associated with the one-way valve assembly.
REFERENCES:
patent: 3319653 (1967-05-01), Stephens
patent: 3710824 (1973-01-01), Lohbauer
patent: 3779133 (1973-12-01), Dezelan
Christensen Thorkild
Termansen Poul Erik
Cohan Alan
Danfoss A/S
Michalsky Gerald A.
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