Hydraulic slide control safety valve for a mine support jack

Details Hydraulic slide control safety valve for a mine support jack Hydraulic slide control safety valve for a mine support jack

1984-11-21

1985-12-10

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137528, 137529, 137903, F16K 3112

Patent

active

045572909

ABSTRACT:
A safety valve designed for relieving pressure in a mine support jack. A washer and check valve are positioned in a counterbore located on the front surface of a resilient gasket member. A leg extends from the rear surface of the resilient gasket and extends through a rear chamber to support the check valve in a position sealing the outlet port. The rear chamber is filled with pressurized gas to form a gas cushion. The end of the leg is positioned to seal an inflation orifice.

REFERENCES:
patent: 3399677 (1968-09-01), Gould
patent: 3662779 (1972-05-01), Weber
patent: 4190045 (1980-02-01), Bartels

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