Automatic remote control apparatus
AssigneeEnglish Clays Lovering Pochin & Company Limited
InventorWilliam George Luke
Life of this patent
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Abstract
Hydraulic control apparatus for automatic remote control of a hydraulic actuating ram. The apparatus has a double-acting slave cylinder connectable hydraulically to an actuating ram, and a double-acting master cylinder the piston of which is mechanically connected to the piston of the slave cylinder, the master cylinder being operable by hydraulic pressure supplied via a pilot-operated valve arranged automatically to reverse the stroke of the master ram at limits set according to the desired stroke of the actuating ram. The control apparatus may be used for controlling actuating rams which effect reciprocating pivotal movement about one or more axes of a water jet monitor.
Claims8
Hydraulic actuating system comprising a reciprocating double-acting hydraulic actuating ram, including a piston and cylinder, and hydraulic control means for the automatic remote control of the reciprocating movement of the hydraulic actuating ram, the hydraulic control means comprising a first double-acting ram including a slave piston and slave cylinder, opposite ends of the slave cylinder being connected hydraulically to respective opposite ends of the cylinder of the actuating ram such that reciprocating movement of the slave piston causes reciprocating movement of the actuating ram, a second double-acting ram including a master piston and master cylinder, the slave piston and the master piston being connected by a common piston rod, directional valve means for controlling the hydraulic pressure supply to the master cylinder, the directional valve means being arranged to reverse automatically the direction of movement of the master piston, pilot means adapted to control the directional valve means, and limit switch means adapted to actuate the pilot means for determining the desired length of stroke of the actuating buildups,
Hydraulic actuating system comprising a reciprocating double-acting hydraulic actuating ram, including a piston and cylinder, and hydraulic control means for the automatic remote control of the reciprocating movement of the hydraulic actuating ram, the hydraulic control means comprising a first double-acting ram including a slave piston and slave cylinder, opposite ends of the slave cylinder being connected hydraulically to respective opposite ends of the cylinder of the actuating ram such that reciprocating movement of the slave piston causes reciprocating movement of the actuating ram, a second double-acting ram including a master piston and master cylinder, the slave piston and the master piston being connected by a common piston rod, directional valve means for controlling the hydraulic pressure supply to the master cylinder, the directional valve means being arranged to reverse automtically the direction of movement of the master piston, pilot means adapted to control the directional valve means, limit switch means adapted to actuate the pilot means for determining the desired length of stroke of the actuating ram, and an adjustable flow control valve means operatively connected to the slave cylinder for controlling the rate of movement of the actuating ram.
Dependencies are inferred from the claim text.