Adjustable dry pendent sprinkler

Details Adjustable dry pendent sprinkler Adjustable dry pendent sprinkler

1977-02-07

1978-05-30

Saifer, Robert W.

Fire extinguishers

Sprinkler heads

A62C 3900

Patent

active

040918726

ABSTRACT:
An adjustable dry pendent sprinkler for fire extinguishing sprinkler systems incorporates a heat fusible sprinkler head on an elongated telescopically adjustable device threadably engagable in a horizontal sprinkler main or the like and isolated therefrom by a frangible disc. The device contains a pair of telescopically engaged tubular members both of which are capable of longitudinal movement and one of which is held in a first position by the sprinkler head. A plurality of spheres are radially movable between oppositely disposed configurations of the tubular members so that fusing of the sprinkler head, opening the same, permits one of the tubular members to move into the area occupied by the sprinkler head thereby freeing the spheres to move radially and permit the other of the tubular members to be spring urged toward the frangible disc so as to cut the same and thereafter form a tubular passageway through the device for the delivery of fire extinguishing fluid therethrough.

REFERENCES:
patent: 2291813 (1942-08-01), Knight
patent: 2768696 (1956-10-01), Sherburne
patent: 3061015 (1962-10-01), Cann, Jr.
patent: 3080000 (1963-03-01), Gloeckler
patent: 3529671 (1970-09-01), Adams, Jr.

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