NASA NTRS · 19680000120
Pressure variable orifice for hydraulic control valve
Abstract
Hydraulic valve absorbs impact energy generated in docking or joining of two large bodies by controlling energy release to avoid jarring shock. The area of exit porting presented to the hydraulic control fluid is directly proportional to the pressure acting on the fluid.
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Ammerman, R. L.. 1968-04-01. Pressure variable orifice for hydraulic control valve. https://ntrs.nasa.gov/citations/19680000120
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