F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
303/70, 137/80
F15B 11/16 (2006.01) B60T 13/14 (2006.01) B60T 15/04 (2006.01) B62D 5/07 (2006.01)
Patent
CA 1157069
ABSTRACT OF THE DISCLOSURE A vehicle hydraulic system is disclosed of the type including a steering control valve (29), a brake system (31), and an auxiliary load circuit (65). Fluid flow to these load circuits is controlled by a flow control valve assembly (11) including a priority spool valve (85) which controls the flow of fluid from the inlet port (13) to the priority fluid chamber (75). Fluid flows from the priority fluid chamber to the steering control valve and the brake load system, in parallel, and at equal levels of priority. A shuttle valve assembly (83) receives a steering load signal by means of a load signal line (44) and a brake load signal from the load signal chamber (111), and transmits the higher of the two load signals into the load signal chamber (93) which biases the priority spool valve toward a position to permit a greater flow of fluid into the priority fluid chamber. Therefore, the control valve assembly disclosed herein requires only a single pump to provide sufficient fluid to satisfy the simultaneous demand for fluid by both the steering system and brake system.
358078
Corporation Eaton
Macrae & Co.
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