Discharge head having dual function plug retaining member

Details Discharge head having dual function plug retaining member Discharge head having dual function plug retaining member

1975-06-11

1976-07-27

Ward, Jr., Robert S.

Fire extinguishers

Sprinkler heads

Collapsible strut

169 42, A62C 3712

Patent

active

039714438

ABSTRACT:
A pressure responsive discharge head wherein an expellable plug is disposed in the outlet of a body member having an inlet adapted for connection to a source of extinguishant with the plug being connected relative to the body member by means of a pair of fulcrummed levers. A fusible link maintains the levers in the plug retaining position and is responsive to a predetermined temperature for releasing the levers. An additional member is provided which maintains the levers in a plug retaining position and which is adapted to release the levers in response to a predetermined fluid pressure in the body member, or in response to an additional predetermined temperature.

REFERENCES:
patent: 302991 (1884-08-01), Fowler
patent: 1028940 (1912-06-01), Hunter
patent: 3314482 (1967-04-01), Young
patent: 3561537 (1971-02-01), Dix et al.
patent: 3633676 (1972-01-01), Gloeckler
patent: 3653444 (1972-04-01), Livingston
patent: 3684025 (1972-08-01), Livingston
patent: 3714989 (1973-02-01), Gloeckler
patent: 3828855 (1974-08-01), Woodward et al.

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