Pilot selector valve for simultaneously controlling separate fluid circuits

Claim 1

A vehicle having at least two attachments mounted thereon, each of said attachments having a separate work function, a fluid circuit means, including a control valve, for actuating each of said attachments, and a multiposition pilot selector valve means operatively connected to each of said control valves for selectively communicating a pressurized fluid source to at least one of said control valves for selectively actuating at least one of said attachments, said pilot selector valve means including a spool reciprocally mounted therein and detent means operatively associated with said spool for locking said spool in at least three different positions, manual means for moving said spool to a first position communicating said pressurized fluid source with a first control valve and for simultaneously preventing said pressurized fluid source from communicating with a second control valve; a second position for preventing said pressurized fluid source from communicating with said first and second control valves; and a third position preventing said pressurized fluid source from communicating with said first control valve and for communicating said pressurized fluid source with said second control valve, passage means formed in said pilot selector valve means for venting fluid from a control valve when it is not placed in communication with said pressurized fluid source, and means, including a chamber within said selector valve communicating with said pressurized fluid source, for returning said pilot selector valve to a predetermined position when the fluid pressure in said chamber falls below a predetermined level.