专利名称：Three way valve发明人：Larry K. Spencer申请号：US06/142763申请日：19800505公开号：US04306586A公开日：19811222
摘要：A three way relay valve has a body defining a bore and first and secondchambers, a supply port in fluid communication with the first chamber, and valve andexhaust ports in fluid communication with the second chamber. A plunger is moveablydisposed within the bore and extends from the third chamber into the second chamberand a passageway being provided in the plunger for placing the valve port in fluidcommunication within the body to selectively block fluid communication between thefirst and second chambers or to block fluid flow through the passageway in the plungerand thereby block fluid communication between the valve and exhaust ports. The valvehas a manual reset apparatus and a lock-out device to facilitate actuation of the valveafter pilot pressure has been lost.
申请人：SPENCER; LARRY K.
代理人：Gerald G. Crutsinger,John F. Booth,Monty L. Ross
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