US 5,848,649 AGranted

Fire extinguisher

AssigneeKatsutoshi Matsumoto

InventorsKatsutoshi Matsumoto, Shigeyuki Shiraishi

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Abstract

A fire extinguisher has a pipe member for containing a cylinder filled with liquefied extinguishing gas, and a pusher guide member and a nozzle having an ejection hole formed therein are fitted to upper and lower openings, respectively, of the pipe member. A cylinder receiver to which the cylinder is fitted is mounted to the pusher guide member, and a pusher having a needle provided with a striker pin is movably arranged within the pusher guide member. Axial movement of the pusher is inhibited by a safety plate fitted in a groove formed in the outer peripheral surface of the pusher. In the event a fire breaks out, after removing the safety plate, an extinguishing person strikes the pusher with the fire extinguisher aimed at the origin of the fire, whereupon the pusher moves together with the needle, while compressing a spring interposed between the pusher and the cylinder receiver, and the striker pin of the needle breaks a seal plate of the cylinder, whereby the fire-extinguishing gas in the cylinder fills in a passage defined between the cylinder and the pipe member via a passage formed in the striker pin, the needle and the cylinder receiver, and then ejected from the ejection hole toward the origin of the fire.

Claims3

Dependent claims

A fire extinguisher comprising:

a fixing member for supporting a cylinder filled with fire-extinguishing gas, said fixing member having a peripheral wall in which a cylinder mounting section for receiving a head of the cylinder, a stepped hole and an extinguishing gas ejection hole are formed;
a needle supporting member axially movably arranged in the stepped hole and the cylinder mounting section of said fixing member, said needle supporting member including a collar arranged in the cylinder mounting section and having a larger diameter than the stepped hole, and a needle arranged on the collar so as to face a seal plate provided on the head of the cylinder for breaking the seal plate;
a spring arranged in the stepped hole of said fixing member between a shoulder of the stepped hole and the collar of said needle supporting member for pressing said needle supporting member toward the cylinder;
a spring cotter pin both compressible and expandable, said spring cotter pin serving to, when compressed, hold said needle supporting member in an initial position in which the needle is separated from the seal plate of the cylinder, against a force exerted by said spring;
and
a fusible cap fitted on said fixing member for holding said spring cotter pin in a compressed state, said spring cotter pin being allowed to expand when said fusible cap is heated and melted, thereby allowing axial movement of said needle supporting member, whereby the needle breaks the seal plate of the cylinder.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/840,539Filed 22 Apr 1997 · division
Priority: JP 6-13381124 May 1994
Granted: 15 Dec 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A62C 99/0018
Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames: using gases or vapours that do not support…
A62C 13/62
Portable extinguishers which are permanently pressurised or pressurised immediately before use: with a single permanently pressurised container
A62C 17/00
Hand fire-extinguishers essentially in the form of pistols or rifles
A62C 37/12
Heat-sensitive: with fusible links

Family

Serial446,051Parent of this division · filed 19 May 1995
Serial735,246Parent of this division · filed 22 Oct 1996
US 5,676,190 AParent of this division
US 5,615,743 AParent of this division
US 5,848,649 AThis patent

From the US filing history. Foreign family members aren’t listed.