Float operated overfill protection device

Fluent material handling – with receiver or receiver coacting mea – Automatic control of flow cutoff or diversion – Level or overflow responsive

Reexamination Certificate

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Details

C141S212000, C141S213000, C141S095000, C137S434000, C137S446000, C137S432000

Reexamination Certificate

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07089974

ABSTRACT:
A fuel storage tank includes an overfill protection device for shutting off the flow of fuel into the tank via a fuel fill tube when the contents of the tank reach an intended maximum fill level. The overfill protection device includes a butterfly valve located within the fuel fill tube and a float, slidably mounted outside the fuel fill tube and operatively linked to the butterfly valve. The float rotates the butterfly valve towards the closed position in response to an increasing fuel level in the tank.

REFERENCES:
patent: 2299360 (1942-10-01), Tharp
patent: 4998571 (1991-03-01), Blue et al.
patent: 5010915 (1991-04-01), Johnson et al.
patent: 5095937 (1992-03-01), LeBlanc et al.
patent: 5485866 (1996-01-01), Bowen
patent: 5522415 (1996-06-01), Hopenfeld
patent: 1275314 (1961-11-01), None

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