Fluid handling – With repair – tapping – assembly – or disassembly means – Tapping a pipe – keg – or apertured tank under pressure
Patent
1981-08-31
1984-03-20
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Tapping a pipe, keg, or apertured tank under pressure
1373294, 141351, 222501, 244135R, 251144, 2511496, 251339, F16K 4300
Patent
active
044374879
ABSTRACT:
A drain valve assembly is mounted in the bottom of a fuel tank (10) to allow draining of condensate. The tank (10) is drained of fluid by the use of a tool (27) pushed upward against the piston (18) of the valve assembly separating it from its seat (15) in the valve housing (12) allowing liquid which has entered the housing (12) from the tank (10) through openings (16 ) to exit around the periphery of the unseated valve. If the valve assembly base is struck by lightning, a blast pressure occurs that can drive the poppet of a standard valve open allowing the electrical energy to enter the tank (10) causing a potential explosion. With the present valve assembly the pressure is allowed to pass through passage (20) in the piston (18) to apply a closing force on the surfaces (21, 22) and the inner end of the piston (18) which is greater than the opening force due to the area difference and the valve assembly remains closed.
REFERENCES:
patent: 2796882 (1957-06-01), Bradley
patent: 3022797 (1962-02-01), Allin
patent: 3026897 (1962-03-01), Derrington et al.
patent: 3103341 (1963-09-01), Moran
patent: 3112763 (1963-12-01), Tennis et al.
patent: 3145968 (1964-08-01), Marx
patent: 3610572 (1971-10-01), Swearingen
patent: 3698420 (1972-10-01), Grundy et al.
patent: 3703189 (1972-03-01), Koller
Lockheed Corporation
Sullivan John J.
Walton George L.
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