US3858659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguisher apparatus
Assignee: Hatsuta Manufacturing Co Ltd
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Filing: 1973-08-24
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Granted: 1975-01-07
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Expires: 1993-08-24
Abstract
Abstract A device for discharging a fire-extinguishing agent. The device includes a cylinder and a cassette tank containing a specified fire-extinguishing agent housed in the cylinder. The tank is airtightly sealed within the cylinder but is capable of being taken out of and put back into the housing when desired. A high pressure gas cartridge is secured to the housing and a breaking lever is used to break a seal on the cartridge. When this occurs, highly pressurized gas from the cartridge is directed toward the cassette tank via connecting pipes. This gas stirs the fire extinguishing agent in the tank and breaks a second seal located between the cassette tank and a passage leading to the fire extinguisher nozzle. As a result, the fire extinguishing agent in the cassette is forced out through the nozzle towards the fire.
Inventors
- 👤 Yasuichi Fukushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:31
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/66; A62C13/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
177 words
A fire extinguisher device comprising a cylindrical housing and a nozzle connected to said housing, said housing having means to accommodate in the inside thereof a sealed cassette tank containing a fire-extinguishing agent, means for air-tightly sealing a cassette tank to said housing, said housing having means for air-tightly securing thereto a high pressure gas cartridge sealed by a seal, a first passage communicating between said means for securing said gas cartridge and the inside of said housing at a position which would be adjacent one end of a cassette tank when located therein, a second passage communicating between the inside of said housing adjacent a cassette tank when located therein and said nozzle, a breaker lever means mounted within said first passage and selectively movable for breaking said seal on said gas cartridge and for causing highly pressurized gas from said cartridge to flow through said first passage into a cassette tank when located in said housing to stir the fire-extinguishing agent therein and to force the same through said second passage and out said nozzle.
Claim 2
Dependent Claim
177 words
A fire extinguisher device comprising a cylindrical housing and a nozzle connected to said housing, said housing having means to accommodate in the inside thereof a sealed cassette tank containing a fire-extinguishing agent, means for air-tightly sealing a cassette tank to said housing, said housing having means for air-tightly securing thereto a high pressure gas cartridge sealed by a seal, a first passage communicating between said means for securing said gas cartridge and the inside of said housing at a position which would be adjacent one end of a cassette tank when located therein, a second passage communicating between the inside of said housing adjacent a cassette tank when located therein and said nozzle, a breaker lever means mounted within said first passage and selectively movable for breaking said seal on said gas cartridge and for causing highly pressurized gas from said cartridge to flow through said first passage into a cassette tank when located in said housing to stir the fire-extinguishing agent therein and to force the same through said second passage and out said nozzle.
Claim 3
Dependent Claim
17 words
A fire extinguisher device as claimed in claim 1 further including means for actuating said breaking lever.
Claim 4
Dependent Claim
28 words
A fire extinguisher device as claimed in claim 1 further including a cassette tank positioned within said housing and a gas cartridge attached to said means for securing.
Claim 5
Dependent Claim
39 words
A fire extinguisher device as claimed in claim 3 wherein said cassette tank includes a central pipe means having a frangible seal at one end thereof and wherein said second passage communicates with the interior of said pipe means.
Claim 6
Dependent Claim
51 words
A fire extinguisher device as claimed in claim 4 wherein said central pipe means comprises a coaxial pipe means comprising two pipes and flexible seal means separating the space between said two pipes and the interior of said cassette tank, said first passage communicating with the space between said two pipes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |