Automatic shutoff valve mechanism

Details Automatic shutoff valve mechanism Automatic shutoff valve mechanism

1994-11-10

1996-07-30

Fox, John C.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

137 39, F16K 1736, F16K 1740

Patent

active

055402496

ABSTRACT:
The valve in automatic shutoff valve mechanism is held in a predetermined elevated open position by a magnet spaced above the valve, and the valve can be released for downward movement into shutoff position either by melting of a fusible nut holding a threaded magnet-supporting stem or by the mechanism being vibrated sufficiently severely to shake the valve loose from the attraction of the magnet.

REFERENCES:
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patent: 3360007 (1967-12-01), Haidek et al.
patent: 3783887 (1974-01-01), Shoji
patent: 3850189 (1974-11-01), Follett
patent: 4018419 (1977-04-01), Monpetit
patent: 4116209 (1978-09-01), Greer
patent: 4128105 (1978-12-01), Follett
patent: 4207912 (1980-06-01), Ichikawa
patent: 4640303 (1987-02-01), Greenberg
patent: 4745940 (1988-05-01), Ely
patent: 4785842 (1988-11-01), Johnson, Jr.
patent: 4883081 (1989-11-01), Morris
patent: 4960146 (1990-10-01), Morris

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