US3773111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguishing apparatus
Assignee: FIRE FOX Corp
•
Filing: 1971-04-05
•
Granted: 1973-11-20
•
Expires: 1991-04-05
Abstract
Abstract An automatic fire extinguishing apparatus in which a pyrotechnic wire or cord is stretched above the area to be protected, and leads to a fire extinguisher mounted adjacent the area to be protected. The fire extinguisher includes a propellant container operatively connected to the pyrotechnic cord and containing a suitable material adapted to generate gas pressure, plug means closing the propellant container and removable as a result of the burning of the pyrotechnic cord and an outer container having a propellant container mounted therein and containing a suitable fire extinguishing material such as carbon tetrachloride or sodium carbonate, the outer container also having a plurality of apertures oriented such that the entire area to be protected will be blanketed by the fire extinguishing material when the fire extinguishing material is forced through the apertures under pressure and frangible sealing means covering the apertures and adapted to rupture when the propellant applies sufficient pressure to the fire extinguishing material in the outer container. The extinguishing apparatus is particularly useful for Class B fires and is conveniently mounted in a range hood over a cooking range, beneath the hood of an automobile, as an ornament at the top of a Christmas tree, in a laboratory hood over a laboratory bench or as a self-contained unit above a furnace, an air conditioning motor or the like.
Inventors
- 👤 B Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:02
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/006; A62C3/008; A62C3/04
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
39 words
Apparatus in accordance with claim 1 which additionally includes a vented hood mounted above the area to be protected and in which the outer container is mounted in said hood and the cordeau detonant is stretched across said hood.
Claim 2
Dependent Claim
16 words
Apparatus in accordance with claim 2 wherein the vented hood is mounted above a cooking range.
Claim 3
Dependent Claim
16 words
Apparatus in accordance with claim 3 wherein the vented hood is mounted above a laboratory bench.
Claim 4
Dependent Claim
18 words
Apparatus in accordance with claim 1 wherein the apparatus is detachably mounted above the area to be protected.
Claim 5
Dependent Claim
32 words
Apparatus in accordance with claim 1 wheRein the closure means is a frangible disc adapted to rupture when a predetermined pressure above the pressure normally on the fire extinguishing agent is reached.
Claim 6
Dependent Claim
33 words
Apparatus in accordance with claim 1 wherein the closure means is a pressure responsive valve adapted to open when a predetermined pressure above the pressure normally on the fire extinguishing agent is reached.
Claim 7
Dependent Claim
19 words
Apparatus in accordance with claim 1 wherein the propellant means includes a container adapted to hold a pressurized gas.
Claim 8
Dependent Claim
20 words
Apparatus in accordance with claim 1 wherein the propellant means includes a container adapted to hold a gas generating agent.
Claim 9
Dependent Claim
14 words
Apparatus in accordance with claim 9 wherein the gas generating agent is a liquid.
Claim 10
Dependent Claim
14 words
Apparatus in accordance with claim 9 wherein the gas generating agent is a solid.
Claim 11
Dependent Claim
49 words
Apparatus in accordance with claim 9 wherein the propellant container is divided into two sections, the two sections contain two different chemical agents which react with one another to generate a gas when mixed and in which the divider between the two sections is ruptured by the actuating means.
Claim 12
Dependent Claim
32 words
Apparatus in accordance with claim 9 wherein the propellant container is adapted to hold a chemical agent adapted to react with the fire extinguishing agent in the outer container to generate gas.
Claim 13
Dependent Claim
34 words
Apparatus in accordance with claim 1 wherein the propellant means is a section of the outer container separated from the fire extinguishing agent by a divider which can be ruptured by the actuating means.
Claim 14
Dependent Claim
32 words
Apparatus in accordance with claim 1 wherein the propellant means includes a container adapted to hold a propellant and the actuating means is a mechanical puncturing means adapted to puncture said container.
Claim 15
Dependent Claim
26 words
Apparatus in accordance with claim 1 wherein the actuating means is a flammable cordeau detonant closing an opening in a container adapted to hold the propellant.
Claim 16
Dependent Claim
25 words
Apparatus in accordance with claim 1 wherein the actuating means is an explosive charge closing an opening in a container adapted to hold the propellant.
Claim 17
Dependent Claim
69 words
Apparatus in accordance with claim 1 wherein the propellant means includes a propellant two-section container adapted to hold two separate chemical agents which react to generate a gas, the actuating means is adapted to rupture a divider between said two sections and said container includes a pressure responsive means adapted to release said gas into the fire extinguishing agent when a pressure is built up within said propellent container.
Claim 18
Dependent Claim
31 words
Apparatus in accordance with claim 1 wherein the outer container is mounted on the underside of an automobile hood and the cordeau detonant is stretched across the underside of said hood.
Claim 19
Dependent Claim
39 words
Apparatus in accordance with claim 1 which additionally includes a frame means adapted to be mounted above the area to be protected, the outer container is mounted on said frame, and the cordeau detonant is stretched across said frame.
Claim 20
Dependent Claim
29 words
Apparatus in accordance with claim 1 wherein the outer container is in the form of a Christmas tree ornament adapted to be mounted at the top of said tree.
Claim 21
Dependent Claim
22 words
Apparatus in accordance with claim 21 wherein the cordeau detonant is an ornamental tinsel-type structure adapted to be draped about the tree.
Claim 22
Dependent Claim
37 words
Apparatus in accordance with claim 1 wherein the closure means is a pressure-fit cap adapted to be forced off the closure means when a predetermined pressure above the pressure normally on the fire extinguishing agent is reached.
Claim 23
Dependent Claim
17 words
Apparatus in accordance with claim 1 wherein the actuating means is a portion of a cordeau detonant.
Claim 24
Dependent Claim
211 words
An automatic fire extinguishing apparatus, comprising; an outer container adapted to be mounted above the area to be protected and to hold a solid, powder-form fire extinguishing agent at essentially ambient pressure and having aperture means therein adapted to distribute extinguishing agent over said area to be protected; closure means normally sealing said aperture, retaining said extinguisHing agent in said outer container and adapted to open when a predetermined pressure above the pressure normally on said fire extinguishing agent is reached; propellant means within said outer container including a piston slidably mounted in said outer container and adapted to displace said fire extinguishing agent from said outer container when pressure is applied to said piston and pressure means adapted to generate a gas pressure on said piston sufficient to open said closure means and force said fire extinguishing agent through said aperture means when actuated; actuating means within said outer container, operatively associated with said pressure means and adapted to cause said pressure means to generate gas pressure on said piston; and flame-responsive cordeau detonant means resistant to spontaneous ignition at temperatures normally encountered in said area to be protected, operatively connected to said actuating means to actuate said actuating means and stretched across and above said area to be protected.
Claim 25
Dependent Claim
19 words
Apparatus in accordance with claim 25 wherein the pressure means is a spring held under compression behind the piston.
Claim 26
Dependent Claim
25 words
Apparatus in accordance with claim 25 wherein the pressure means includes a spring under tension attached to the piston means at the front end thereof.
Claim 27
Dependent Claim
33 words
Apparatus in accordance with claim 25 wherein the pressure means includes a spring under compression behind the piston means and a spring under tension attached to the piston means at its forward end.
Claim 28
Dependent Claim
39 words
Apparatus in accordance with claim 25 which additionally includes a vented hood mounted above the area to be protected and in which the outer container is mounted in said hood and the cordeau detonant is stretched across said hood.
Claim 29
Dependent Claim
16 words
Apparatus in accordance with claim 29 wherein the vented hood is mounted above a cooking range.
Claim 30
Dependent Claim
16 words
Apparatus in accordance with claim 29 wherein the vented hood is mounted above a laboratory bench.
Claim 31
Dependent Claim
18 words
Apparatus in accordance with claim 25 wherein the apparatus is detachably mounted above the area to be protected.
Claim 32
Dependent Claim
32 words
Apparatus in accordance with claim 25 wherein the closure means is a frangible disc adapted to rupture when a predetermined pressure above the pressure normally on the fire extinguishing agent is reached.
Claim 33
Dependent Claim
34 words
Apparatus in accordance with claim 25 and wherein the closure means is a pressure responsive valve adapted to open when a predetermined pressure above the pressure normally on the fire extinguishing agent is reached.
Claim 34
Dependent Claim
19 words
Apparatus in accordance with claim 25 wherein the pressure means is a container adapted to hold a pressurized gas.
Claim 35
Dependent Claim
20 words
Apparatus in accordance with claim 25 wherein the pressure means is a container adapted to hold a gas generating agent.
Claim 36
Dependent Claim
14 words
Apparatus in accordance with claim 36 wherein the gas generating agent is a liquid.
Claim 37
Dependent Claim
14 words
Apparatus in accordance with claim 36 wherein the gas generating agent is a solid.
Claim 38
Dependent Claim
49 words
Apparatus in accordance with claim 36 wherein the propellant container is divided into two sections, the two sections contain two different chemical agents which react with one another to generate a gas when mixed and in which the divider between the two sections is ruptured by the actuating means.
Claim 39
Dependent Claim
32 words
Apparatus in accordance with claim 36 wherein the propellant container is adapted to hold a chemical agent adap-ted to react with the fire extinguishing agent in the outer container to generate gas.
Claim 40
Dependent Claim
32 words
Apparatus in accordance with claim 25 wherein the pressure means is a container adapted to hold a propellant and the actuating means is a mechanical puncturing means adapted to puncture said container.
Claim 41
Dependent Claim
18 words
Apparatus in accordance with claim 25 wherein the actuating means is a portion of a flammable cordeau detonant.
Claim 42
Dependent Claim
27 words
Apparatus in accordance with claim 42 wherein the actuating means is a flammable cordeau detonant closing an opening in a container adapted to hold the pressure means.
Claim 43
Dependent Claim
26 words
Apparatus in accordance with claim 25 wherein the actuating means is an explosive cHarge closing an opening in a container adapted to hold the pressure means.
Claim 44
Dependent Claim
67 words
Apparatus in accordance with claim 25 wherein the pressure means includes a two-section, propellant container adapted to hold two separate chemical agents which react to generate a gas, the actuating means is adapted to rupture a divider between said two sections and said propellant container includes pressure responsive means adapted to release said gas against the piston when a pressure is built up within said propellant container.
Claim 45
Dependent Claim
31 words
Apparatus in accordance with claim 25 wherein the outer container is mounted on the underside of an automobile hood and the cordeau detonant is stretched across the underside of said hood.
Claim 46
Dependent Claim
39 words
Apparatus in accordance with claim 25 which additionally includes a frame means adapted to be mounted above the area to be protected, the outer container is mounted on said frame, and the cordeau detonant is stretched across said frame.
Claim 47
Dependent Claim
29 words
Apparatus in accordance with claim 25 wherein the outer container is in the form of a Christmas tree ornament adapted to be mounted at the top of said tree.
Claim 48
Dependent Claim
22 words
Apparatus in accordance with claim 48 wherein the cordeau detonant is an ornamental tinsel-type structure adapted to be draped about the tree.
Claim 49
Dependent Claim
37 words
Apparatus in accordance with claim 25 wherein the closure means is a pressure-fit cap adapted to be forced off the closure means when a predetermined pressure above the pressure normally on the fire extinguishing agent is reached.
Claim 50
Dependent Claim
195 words
An automatic fire extinguishing apparatus, comprising; an outer container adapted to be mounted above the area to be protected and to hold a solid, powder-form fire extinguishing agent at essentially ambient pressure and having aperture means therein adapted to distribute extinguishing agent over said area to be protected; frangible, disc-type closure means normally retaining said extinguishing agent in said outer container, separating said extinguishing agent from said aperture and adapted to rupture when a predetermined pressure above the pressure normally on said fire extinguishing agent is reached; propellant means within said outer container adapted to generate a gas pressure on said fire extinguishing agent sufficient to rupture said closure means and force said fire extinguishing agent through said aperture when actuated; actuating means within said outer container, operatively associated with said propellant means and adapted to energize said propellant means and cause said propellant means to generate gas pressure on said fire extinguishing agent; and a flame-responsive cordeau detonant means resistant to spontaneous ignition at temperatures normally encountered in said area to be protected, operatively connected to said actuating means to actuate said actuating means, and stretched across and above said area to be protected.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |