Sprinkler

Details Sprinkler Sprinkler

2005-12-20

2005-12-20

Hwu, Davis (Department: 3752)

Fire extinguishers

Fusible connections

C169S037000, C169S038000, C169S041000, C169S019000, C169S026000, C169S056000, C169S057000

Reexamination Certificate

active

06976544

ABSTRACT:
A sprinkler comprising a temperature-activated means (1), a housing (2), a central nozzle (4), a side nozzle (5a, 5b), a first channel (9-15-6-12-13) for guiding a medium to the central nozzle, and a second channel (9-15-17-14-7a) for guiding the medium to the side nozzle, the second channel being closed with a spindle means (8) while the sprinkler is in its standby state. To provide a sprinkler for implementing a fire fighting apparatus that extinguishes efficiently at the fire site, even though hot combustible gases were spread far from the fire site to cause the triggering of sprinklers far from the fire site, the spindle means (8) comprises a first spindle part (8a) having a first action surface area (A1) exposed to the pressure of the medium after the temperature-activated means (1) is triggered and an additional surface area (A2) that comes under at least a first pressure of the medium when the first spindle part (8a) moves from a first position, in which only the first channel is open (9-15-6-12-13), to a second position, in which the first and the second channel (9-15-17-14-7a) are open.

REFERENCES:
patent: 4664198 (1987-05-01), Johnson
patent: 4715447 (1987-12-01), Johnson
patent: 4880063 (1989-11-01), Leininger et al.
patent: 5188185 (1993-02-01), Mears
patent: 5513708 (1996-05-01), Sundholm
patent: 5944113 (1999-08-01), Sundholm
patent: 6230815 (2001-05-01), Sundholm
patent: 6345670 (2002-02-01), Sundholm
patent: 9531252 (1995-11-01), None

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