Pressure limiting valve, particularly for hydraulic mine props

Details Pressure limiting valve, particularly for hydraulic mine props Pressure limiting valve, particularly for hydraulic mine props

1981-08-12

1983-12-06

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137529, F16K 3112

Patent

active

044187157

ABSTRACT:
The invention relates to a pressure limiting valve, mainly for hydraulic mine props, which has a working space with an inlet opening connected to a high-pressure space and an outlet opening connected to low-pressure space in the operative position of the valve, a displaceable first valve member engageable with a valve seat within this working space in the shut-off position of the valve, a spring pressing the first valve member to the valve seat and in a given case, a spring sustaining the valve seat, suitably a gas spring and in which according to the invention the first valve member has transfer passages ensuring communication between the inlet opening and the outlet opening in the open position of the valve, as well as second valve member provided with a frustoconical head facing the cover plate and having a stem loosely fitted in a guide bore formed in the first valve member which is formed with an annular axial flange surrounding the head of the second valve member which is concentrically arranged within this flange.

REFERENCES:
patent: 3036593 (1962-05-01), Saville
patent: 3050078 (1962-08-01), Hooper
patent: 3856043 (1974-12-01), Feild
patent: 4074695 (1978-02-01), Weirick

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