Automatic fire sprinkler having a variable orifice

Details Automatic fire sprinkler having a variable orifice Automatic fire sprinkler having a variable orifice

2007-07-03

2007-07-03

Nguyen, Dinh Q. (Department: 3752)

Fire extinguishers

Sprinkler heads

C169S019000, C169S020000, C169S005000, C169S008000, C169S016000, C239S569000, C239S570000, C239S546000, C137S859000, C137S849000

Reexamination Certificate

active

10624473

ABSTRACT:
An automatic fire sprinkler having a variable orifice, the sprinkler having a variable orifice associated with the automatic fire sprinkler, and wherein the orifice is responsive to the water inlet pressure of the sprinkler.

REFERENCES:
patent: 2593315 (1952-04-01), Kraft
patent: 3072288 (1963-01-01), Lemmer
patent: 3759331 (1973-09-01), Livingston
patent: 3871457 (1975-03-01), Livingston
patent: 3895646 (1975-07-01), Howat
patent: 4553602 (1985-11-01), Pieczykolan
patent: 5323963 (1994-06-01), Ballu

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