Closed center draft control valve

Details Closed center draft control valve Closed center draft control valve

F - Mech Eng,Light,Heat,Weapons

15

B

138/80.11

F15B 13/01 (2006.01) A01B 63/10 (2006.01) A01B 67/00 (2006.01) B62D 49/02 (2006.01) F15B 11/06 (2006.01)

Patent

CA 1125626

CLOSED CENTER DRAFT CONTROL VALVE ABSTRACT OF THE DISCLOSURE A variable displacement pump supplies fluid to the single acting draft control cylinder of an agricultural tractor through a valve for controlling flow to and from the draft control cylinder. The valve houses a control rod activated valve spool that when displaced allows fluid to unseat a check valve between the spool valve and the draft control cylinder. Fluid is exhausted from the draft control cylinder when the control rod causes unseating of a main poppet by unseating a pilot valve in the main poppet. Fluid being exhausted from the draft control cylinder then passes through the valve to tank.

335361

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