Hydraulic shock absorption in punch or cutting presses
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United States of America Patent
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-
Nov 18, 1980
Grant Date -
N/A
app pub date -
Oct 23, 1978
filing date -
Oct 27, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided a hydraulic shock absorption cutting and/or punching system which may be applied to a pre-existing press with said system having at least one damping cylinder that is under preset pressure supplied by a pump with the pressure chamber of the cylinder being connected with a damping valve. The damping valve has a piston-type displacing element including a throttle member, the construction and design of which provides for pressure-dependent adjustment of said throttle member in a housing on axial movement of said throttle member so that the cross section of a throttle gap is finely controlled and pressure-dependent adjustment of said gap is attained while also providing for practically constant flow through said throttle gap.
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