Fire extinguishers – Sprinkler heads – Collapsible strut
Patent
1998-04-20
1999-10-19
Hoge, Gary C.
Fire extinguishers
Sprinkler heads
Collapsible strut
A62C 3709
Patent
active
059672404
ABSTRACT:
In the particular embodiments described in the specification, a dry sprinkler has a tube-like section with a sprinkler head at one end and a threaded portion to be received in a water supply line at the opposite end and it includes an internal support structure extending between a sealing plug in the end to be received in the water supply line and a cap in the sprinkler head which is supported by a thermally responsive structure. In one embodiment, the support structure includes a rod on which the sealing plug is mounted at one end and having a cap-engaging tip at the opposite end which is shaped to facilitate the flow of water from the sprinkler head toward a deflector, the rod being spaced from the tube-like section by two guide members, one of which acts as a stop for motion of the structure toward the sprinkler head and the other which engages a spring urging the structure toward the sprinkler head. In other embodiments, a spacer is inserted between the end of the rod and the cap in the sprinkler head and a separate rod tip may be inserted between the rod and the spacer. In a further embodiment, an inner tube extends between the cap and the sealing plug and is shaped with spaced triangular tips to support the sealing plug in the unactuated condition and a water supply line connection which is coupled to the water supply line has a lateral cavity recess to receive the sealing plug out of the path of water flowing through the inner tube when the sprinkler is actuated.
REFERENCES:
patent: 3080000 (1963-03-01), Gloeckler
patent: 4177862 (1979-12-01), Bray
patent: 4228858 (1980-10-01), Sclafani
patent: 4976320 (1990-12-01), Polan
patent: 5188185 (1993-02-01), Mears
Hoge Gary C.
The Reliable Automatic Sprinkler Co. Inc.
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