초록 ▼

A warm-up valve in a load responsive hydraulic system which connects the pump discharge pressure with the pump compensator while bypassing to reservoir a partial capacity of the pump. When proper reservoir temperature is reached, a thermostatically controlled solenoid closes the warm-up valve causin

A warm-up valve in a load responsive hydraulic system which connects the pump discharge pressure with the pump compensator while bypassing to reservoir a partial capacity of the pump. When proper reservoir temperature is reached, a thermostatically controlled solenoid closes the warm-up valve causing the pump to return to low pressure standby.

대표청구항 ▼

A warm-up valve in a system having a variable displacement pressure and flow compensated pump supplying at least one function through at least one directional control valve with a signal sensing line from the control valve to the compensator on the pump, the warm-up valve comprising: a temperature-a

A warm-up valve in a system having a variable displacement pressure and flow compensated pump supplying at least one function through at least one directional control valve with a signal sensing line from the control valve to the compensator on the pump, the warm-up valve comprising: a temperature-actuated servo means sensing the system reservoir temperature; a valve means positioned in a line connecting the pump discharge to reservoir, said means being actuated by said servo means having a spool which in its first position opens the pump discharge to the pump compensator and allows a controlled amount of the pump capacity to return to reservoir; the valve spool having a second position, when actuated by the servo means, which blocks the pump discharge to the pump compensator and to reservoir.