Vapor recovery and vent signal system

Fluent material handling – with receiver or receiver coacting mea – With signal – indicator – recorder – inspection means or exhibitor – Level or pressure in receiver

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141285, B65B 3106

Patent

active

039839133

ABSTRACT:
In a liquid storage tank such as an underground storage tank for liquid fuels having a liquid input passage and a vent passage, the improvement of vapor recovery passage means opening outwardly from the tank and connectible to an external vapor recovery system, the vapor recovery passage being blocked by liquid flow when the level of liquid in the tank rises above a predetermined level to prevent the discharge of vapor therethrough, signal means communicating with the vent passage means and operative in response to an increase in pressure in the vent line caused by the blockage of the vapor recovery line during the filling of the tank to provide a signal indicating that the tank has been filled to a predetermined level.

REFERENCES:
patent: 3548779 (1970-12-01), Green
patent: 3807465 (1974-04-01), Ginsburgh et al.

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