Non-leaking storage charging valve
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United States of America Patent
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Dec 20, 1994
Grant Date -
N/A
app pub date -
Aug 23, 1993
filing date -
Jan 4, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to an accumulator charging valve, which for the connection of an inlet P supplying a hydraulic system 10 to an outlet T when an adjustable upper charging pressure in the hydraulic system 10 is reached and for separating this connection when an adjustable lower charging pressure in the hydraulic system 10 is reached, is provided with a control piston 42, which in one of its two switching positions breaks the connection between the inlet P and outlet T and in the other switching position makes this connection. By means of a separating device, a control connection B connecting the hydraulic system 10 to the accumulator charging valve can be separated from the outlet T. On reaching the adjustable upper charging pressure, by means of at least one sealing part of the separating device, the connection forming a leakage point between the control connection B and the outlet T can be sealed hermetically. Due to this arrangement, inside the valve, in the range between the lower and the upper charging pressure, the hydraulic system 10 can be shut off in a completely non-leaking manner.
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