By-pass incorporated in hydraulic control and activation cylinders to facilitate air bleeding
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United States of America Patent
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N/A
Issued Date -
Jul 31, 2003
app pub date -
Jan 14, 2003
filing date -
Jan 25, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A hydraulic control arrangement including a hydraulic driving pump including a tank and vent; a cylinder to facilitate air bleeding and purging in a hydraulic circuit, the cylinder including a jacket, cylinder heads at opposite ends of the jacket, a piston movable in the jacket, drive rods connected with opposite sides of the piston and protruding from the cylinder heads, cylinder chambers in the jacket on opposite sides of the piston, a by-pass in the jacket which connects the cylinder chambers, and a valve associated with the by-pass; fluid coupling fittings at opposite ends of the jacket; pipes connected with the fittings to independently connect the cylinder chambers to the hydraulic driving pump; and a valve arrangement fluidly connected between the pipes and the hydraulic driving pump to speed up and simplify hydraulic fluid feed and air purging operations of the cylinder chambers.
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