Patent CA1152857A successfully refreshed from Google Patents.
CA1152857A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Fire extinguishing system
Assignee: Tyco International Canada Ltd
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Filing: 1982-11-01
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Granted: 1983-08-30
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Expires: 2002-11-01
Abstract
Abstract ABSTRACT OF THE DISCLOSURE The disclosure herein describes a system for extinguishing fires which consists in first maintaining a supply of liquid fire extinguishing medium in a tank under a pressure cushion of expellant material; the medium is delivered upon detection of a hazard by opening a normally closed valve in a delivery line connected to the tank; this operation triggers a sequen-tial operation of a plurality of groups of expellant containers which causes additional expellant material to be delivered to the tank to maintain therein a given pressure so as to effect quick and total evacuation of the fire extinguishing medium from the tank to the hazard.
Inventors
- 👤 Walter G. Miller
- 👤 Michel Mace
- 👤 George Zitterbart
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-10 01:14
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/0009; A62C99/0018; A62C3/00; A62C3/16; A62C35/00; A62C35/58; A62C35/62; A62C37/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
143 words
A fire extinguishing system comprising: (a) a tank; (b) a fire extinguishing medium partially filling said tank; (c) an expellant material under pressure in the remaining part of the tank, said material defining a pressure cushion acting on said medium; (d) a delivery line associated with said tank for carrying said medium from said tank to a hazard; (e) valve means in said delivery line including a normally closed main valve operable to deliver said fire extinguishing medium to said hazard; (f) a reserve of expellant containing means in conduit communication with said cushion in said tank; (g) actuator means for operating said main valve and for initiating sequential operation of said expellant containing means for delivering additional expellant material to said tank to maintain a pre-determined pressure therein for quick and total evacuation of said medium from said tank to said hazard.
Claim 2
Dependent Claim
143 words
A fire extinguishing system comprising: (a) a tank; (b) a fire extinguishing medium partially filling said tank; (c) an expellant material under pressure in the remaining part of the tank, said material defining a pressure cushion acting on said medium; (d) a delivery line associated with said tank for carrying said medium from said tank to a hazard; (e) valve means in said delivery line including a normally closed main valve operable to deliver said fire extinguishing medium to said hazard; (f) a reserve of expellant containing means in conduit communication with said cushion in said tank; (g) actuator means for operating said main valve and for initiating sequential operation of said expellant containing means for delivering additional expellant material to said tank to maintain a pre-determined pressure therein for quick and total evacuation of said medium from said tank to said hazard.
Claim 3
Dependent Claim
17 words
A fire extinguishing system as defined in claim 1, wherein said medium is a liquid halogenated hydrocarbon.
Claim 4
Dependent Claim
17 words
A fire extinguishing system as defined in claim 1 or 2, wherein said expellant material is nitrogen.
Claim 5
Dependent Claim
28 words
A fire extinguishing system as defined in claim 1, wherein said actuator means include means responsive to a signal originating from a controlling station associated with said system.
Claim 6
Dependent Claim
50 words
A fire extinguishing system as defined in claim 4, wherein said reserve consists of a plurality of groups of serially connected cylinders; said groups being successively operable; means associated with each of said groups of cylinders for detecting a given pressure and for switching to a successive group of cylinders.
Claim 7
Dependent Claim
35 words
A fire extinguishing system as defined in claim 5, wherein the pressure detecting means of the last group of cylinders transmits a signal to said controlling station to indicate termination of said expellant delivering operations.
Claim 8
Dependent Claim
35 words
A fire extinguishing system as defined in claim 6 comprising time setting means connected to said pressure detecting means for ensuring operation of said pressure detecting means during a time corresponding to said total evacuation.
Claim 9
Dependent Claim
14 words
A fire extinguishing system as defined in claim 4 wherein said signal is pneumatic.
Claim 10
Dependent Claim
23 words
A fire extinguishing system as defined in claim 1, wherein one end of said delivery line extends to the bottom of said tank.
Claim 11
Dependent Claim
62 words
A fire extinguishing system as defined in claim 1, wherein said valve means further includes a second valve upstream of said main valve in said delivery line and a rupture disk therein downstream of said main valve for detecting leak of said medium through said normally closed main valve; said disk being ruptured upon evacuation of said medium through said delivery line.
Claim 12
Independent Claim
110 words
A method of extinguishing a fire compris-ing the steps of: (a) maintaining a supply of liquid fire extinguishing medium in a tank under a pressure cushion of expellant material; (b) initiating delivery of said medium through a delivery line upon detection of a hazard by opening a normally closed valve in said delivery line; (c) initiating the sequential operation of a plurality of serially operable groups of expellant containers in conduit communication with said expellant material in said tank to thereby deliver additional expellant material to said tank to maintain a given pressure in said tank for quick and total evacuation of said medium from said tank to said hazard.
Claim 13
Independent Claim
110 words
A method of extinguishing a fire compris-ing the steps of: (a) maintaining a supply of liquid fire extinguishing medium in a tank under a pressure cushion of expellant material; (b) initiating delivery of said medium through a delivery line upon detection of a hazard by opening a normally closed valve in said delivery line; (c) initiating the sequential operation of a plurality of serially operable groups of expellant containers in conduit communication with said expellant material in said tank to thereby deliver additional expellant material to said tank to maintain a given pressure in said tank for quick and total evacuation of said medium from said tank to said hazard.
Claim 14
Dependent Claim
32 words
A method as defined in claim 11, compris-ing the step of maintaining said expellant material in one group of containers until a falling pressure of a preceding group of containers is reached.
Claim 15
Dependent Claim
29 words
A method as defined in claim 12, compris-ing the step of transmitting a signal to a controlling station when the last group of containers has reached said falling pressure.
Claim 16
Dependent Claim
24 words
A method as defined in claim 11, 12 or 13, wherein said medium is a liquid halogenated hydrocarbon and said expellant material is nitrogen.
References Cited (Backward Citations)
No citation records indexed.
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