Internal tank valve with valve lock

Details Internal tank valve with valve lock Internal tank valve with valve lock

1992-01-17

1992-09-08

Chambers, A. Michael

Valves and valve actuation

With correlated flow path

Tank

251 91, 251 95, 137316, 137382, 137797, F16K 5100

Patent

active

051451514

ABSTRACT:
An internal valve for a mobile tank car having an opening with a valve seat positioned in the opening. A sealing valve element is positioned in the tank for coacting with the valve seat for opening and closing the valve. A disc valve is releasably connected about the passageway below the valve element. A stem sealingly extends through the cap and is engagable with the valve element when the valve element is in the closed position. An actuator is connected to the stem outside of the cap for actuating the stem and locking the valve element in the closed position. A secondary seal may be actuated by the stem.

REFERENCES:
patent: 3981481 (1976-09-01), Reedy et al.
patent: 4121614 (1978-10-01), Reedy
patent: 4161958 (1979-07-01), Behle
patent: 4194523 (1980-03-01), Lubieniecki
patent: 4220097 (1980-09-01), Wempe et al.
patent: 4440379 (1984-04-01), Behle et al.
patent: 5042776 (1991-08-01), Chronister

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