FLOAT CIRCUIT

PROBLEM TO BE SOLVED: To provide a float mechanism so that a tool is lowered while controlling the tool and subsequently float control is performed without requiring a fluid flow from a pressurizing source. SOLUTION: This float circuit 10 is equipped with a load lowering valve device 48 having a pil...

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Bibliographische Detailangaben
1. Verfasser:	VANDE KERCKHOVE PHILIPPE G
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR DREDGING FIXED CONSTRUCTIONS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS FOUNDATIONS HEATING HYDRAULIC ENGINEERING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SOIL SHIFTING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a float mechanism so that a tool is lowered while controlling the tool and subsequently float control is performed without requiring a fluid flow from a pressurizing source. SOLUTION: This float circuit 10 is equipped with a load lowering valve device 48 having a pilot-operated proportional valve 52 arranged between the first inlet port 26 of an actuator 16 and a tank 18 and a discharge/supply valve 54 arranged between the first inlet port 26 of the actuator 16 and the tank 18, and a pilot-operated check valve 66 which is arranged between positions among the second inlet port 28 of the actuator 16, the pilot-operated proportional valve 52 and the tank 18, shuts out fluid flowing through the second inlet port 28 of the actuator 16 in an ordinary state, and is moved to a communicating position when receiving a pressure signal.