Flow control screen for use with hydraulic accumulator, hydraulic hammer using same, and manufacturing method
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United States of America Patent
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Mar 8, 2016
Grant Date -
Jan 23, 2014
app pub date -
Jul 17, 2012
filing date -
Jul 17, 2012
priority date (Note) -
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Abstract
A hydraulic accumulator includes an accumulator housing defining a gas reservoir and a liquid volume. A flexible membrane is positioned within the accumulator housing and separates the gas reservoir and the liquid volume. A flow control screen defines a wall of the accumulator housing, has a screen thickness, and includes an exterior face opposing a membrane engagement face. A first slot is formed through the exterior face and has a first slot depth that is less than the screen thickness. A second slot is formed through the membrane engagement face and has a second slot depth that is less than the screen thickness. The first slot and the second slot intersect to fluidly connect an exterior of the accumulator housing with the liquid volume.
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