Flow sensitive hydraulic control valve

摘要

A hydraulic directional control valve for supplying fluid to a hydraulic motor and incorporating one or more fluid flow sensing valves and a hydraulic latching mechanism. The latching mechanism holds the control valve in a selected operative position until the hydraulic motor completes its working stroke, the flow sensing valves determining when flow to the hydraulic motor ceases and permitting the application of fluid pressure to unlatch the latching mechanism and allowing the automatic return of the control valve to a neutral position. The flow sensing valves also function as check valves to prevent the return of fluid into the fluid supply line.