Patent ID: 6095187
Filing Date: 2000-08-01
Classification: F15B,Y10T

Abstract:
A four-way hydraulic directional control valve, comprising:a) a valve body having a pressure supply port, a tank port, and first and second load ports;b) first and second normally-closed 2-way poppet solenoid zero-leakage valves mounted to said valve body;c) first and second normally-closed zero-leakage pilot-operated check valves mounted within said valve body;d) said pressure supply port being directly connected to both an inlet port of said first poppet solenoid valve and an inlet port of said second poppet solenoid valve;e) said first load port being directly connected to an outlet port of said first poppet solenoid valve and said second load port being directly connected to an outlet of said second poppet solenoid valve;f) said first load port being directly connected to a checked port of said first check valve and said second load port being directly connected to a checked port of said second check valve; andg) said first load port being directly connected to a pilot port of said second check valve and said second load port being directly connected to a pilot port of said first check valve.