Fluent material handling – with receiver or receiver coacting mea – Automatic control of flow cutoff or diversion – Level or overflow responsive
Patent
1986-08-07
1988-04-05
Recla, Henry J.
Fluent material handling, with receiver or receiver coacting mea
Automatic control of flow cutoff or diversion
Level or overflow responsive
141392, 141206, 141209, B65B 328, B65B 5714
Patent
active
047352434
ABSTRACT:
The liquid-dispensing pistol-grip nozzle comprises a filling hose liquid-dispensing device equipped with a delivery pump which can be turned on and shut off, a valve housing with a spigot, a filling hose connector and a connected fuel duct, an operating mechanism with a pistol-grip handle and if necessary a flow rate setting mechanism for the pistol-grip handle, an automatic shut off device and a safety device. The automatic shut off device which operates a locking mechanism has a pressure equalizing chamber, a chamber-separating control membrane and a vacuum chamber with a filling state sensing duct with a vacuum duct opening near the delivery valve seat in the valve housing. The control membrane is connected with flexible free play to a hollow piston shaft of a safety piston guided in the valve housing which is movable between a locked in position and a locked out position. The safety piston is a differential piston with a small effective piston surface and a large effective piston surface. In the locked out position its small effective surface can be acted on by the pressure in the filling hose connector. After overcoming the compressive force of the safety piston spring in its locked in position the large effective surface can be acted on by the pressure in the filling hose connector.
REFERENCES:
patent: 3224472 (1965-12-01), Ehlers
patent: 3233641 (1966-02-01), Ehlers
patent: 3323560 (1967-06-01), Ehlers
patent: 4331187 (1982-05-01), Trygg
patent: 4343336 (1982-08-01), Trygg
patent: 4450879 (1984-05-01), Wood
Cusick Ernest G.
Dubno Herbert
Recla Henry J.
Ross Karl F.
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