Fluid handling – Freeze condition responsive safety systems
Patent
1984-12-12
1986-03-04
Walton, George L.
Fluid handling
Freeze condition responsive safety systems
137397, 251 14, 251 614, E03B 712, F16K 31145, F16K 3300
Patent
active
045734895
ABSTRACT:
A dump valve for dumping liquid from the bottom of a tank comprising an elongated valve body insertable into the lower end of the tank so that the valve body extends deeply into the tank, the innermost portion of the valve body having an inner port communicating with the interior of the tank, the valve body having a portion extending exterior of the tank when the body is inserted into the tank, the valve body having a central axial bore extending therethrough and communicating with the inner port for directing liquid away from the tank, a drain passage connected to the exterior portion of the valve body and communicating with the axial bore for draining liquid from the tank, a pair of head plates connected to the exterior portion of the valve body, the head plates being connected to each other and forming a diaphragm chamber therebetween, a diaphragm held in sealed clamping engagement between the head plates and dividing the chamber into two separate compartments sealed from each other, an elongated valve stem extending within the axial bore from an inner end adjacent the inner port to an outer end which extends through one of the plates and is connected to the diaphragm, a valve closure element mounted on the inner end of the valve stem and adapted to seat in the inner port to close the same, and a pressure conduit connected to one of the compartments for exerting pressure against the diaphragm to move the stem axially to open the inner port to drain liquid from the tank.
REFERENCES:
patent: 737984 (1903-09-01), White
patent: 2431283 (1947-11-01), Spence
patent: 2737167 (1956-03-01), Dickey
patent: 3048274 (1962-08-01), Lundeen
Carlton Lewis M.
Cruse Teddy H.
O'Mary Bob L.
Dorman William S.
Murphy Management Inc.
Walton George L.
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