F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 17/00 (2006.01) F15B 20/00 (2006.01) F15B 21/10 (2006.01) F16K 3/26 (2006.01)
Patent
CA 2266806
A hydraulic control circuit for a hydraulic actuator, including a high-low pilot valve having a sensing port for connection to a flow line. A single pressure line connects the high-low pilot to a hydraulic actuator. A second line connects the high-low pilot to a reservoir. A normally closed relief valve is connected to the single pressure line for relief of excessive pressure. A normally closed override valve is connected to the single pressure line for manual override of circuit controls. A pump is connected to the single pressure line for pressuring the single pressure line. The hydraulic control circuit has a normally open time out valve on the single pressure line, the time out valve being set to close a pre-set time interval after being manually activated, to isolate the high-low pilot, from the single pressure line to the hydraulic actuator, until the time out period has elapsed. The override valve is connected to the single pressure line between the time out valve and the hydraulic actuator. The relief valve is connected to the single pressure line between the time out valve and the hydraulic actuator. The override valve, relief valve, high-low pilot, and the pump are connected between the first line and the reservoir.
Argus Machine Co. Ltd.
Lambert Anthony R.
LandOfFree
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