Control valve

Details Control valve Control valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/77

F16K 21/04 (2006.01) F04B 49/00 (2006.01) F16K 15/18 (2006.01) F16K 39/00 (2006.01)

Patent

CA 1045503

CONTROL VALVE Abstract of the Disclosure A manually operable valve for controlling the displacement of a main pump in a hydrostatic transmission controls the quantity of fluid flow to the main pump for low speed operation of the transmission and controls the pressure of the fluid flowing to the main pump during periods of high speed operation of the trans- mission. The valve includes a pressure chamber acting to substan- tially balance forces on the valving element to obtain low-effort operation of the control plunger regardless of the position of the element and to automatically close the valve upon a failure in the control linkage for the plunger so that in the event the operator loses control of the valve through linkage failure all power to the transmission is cut off.

258870

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