Fluent material handling – with receiver or receiver coacting mea – Automatic control of flow cutoff or diversion – Level or overflow responsive
Patent
1989-09-11
1992-01-07
Cusick, Ernest G.
Fluent material handling, with receiver or receiver coacting mea
Automatic control of flow cutoff or diversion
Level or overflow responsive
137587, 220 86001, 141 59, 141290, 141 35, F16K 2400, B65B 3100
Patent
active
050781871
ABSTRACT:
An underground storage tank system has an internal retained capacity area for receiving excess liquid from a filling operation. The storage tank system comprises a rigid storage tank, fill pipe, vent line, vent extension line, dispensing line, and trapped vapor release valve. The vent extension line extends into the storage tank. The lower end of the vent extension line within the storage tank defines a horizontal plane above which is an internal retained capacity area. The trapped vapor release valve is closed during a filling operation so that eventually a build up or pressure occurs within the retained capacity area to prevent further flow of liquid to the tank. Opening of the trapped vapor release valve relieves the pressure in the retained capacity area thereby allowing excess liquid in the fill pipe and delivery hose to drain into the rigid storage tank.
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Cusick Ernest G.
Wilson Charles R.
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