US3826313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fire protection using recirculation of combustion products to discharge a foam extinguishant
Assignee: Factory Mutual Research Corp
•
Filing: 1973-10-02
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Granted: 1974-07-30
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Expires: 1993-10-02
Abstract
Abstract A method of fire protection in which a foam extinguishant is discharged towards the fire in response to a predetermined fire condition in the space to be protected. At least a portion of the foam discharge is terminated and a fluid extinguishant is discharged towards the fire in response to an additional predetermined fire condition.
Inventors
- 👤 C Yao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:42
CPC Classifications
A; A62; A62C; A62C35/00; A62C35/58; A62C35/60; A62C35/605
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
60 words
A method of fighting a fire comprising the steps of discharging a foam extinguishant towards the fire in response to a predetermined fire condition in the space to be protected, terminating said discharge in response to an additional predetermined fire condition in said space, and discharging a fLuid extinguishant towards said fire in response to said additional predetermined fire condition.
Claim 2
Independent Claim
60 words
A method of fighting a fire comprising the steps of discharging a foam extinguishant towards the fire in response to a predetermined fire condition in the space to be protected, terminating said discharge in response to an additional predetermined fire condition in said space, and discharging a fLuid extinguishant towards said fire in response to said additional predetermined fire condition.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the discharge of said fluid extinguishant is at a greater rate than the discharge of said foam extinguishant.
Claim 4
Independent Claim
78 words
A method of fighting a fire comprising the steps of discharging a foam extinguishant from a plurality of sources towards the fire in response to a predetermined fire condition in the space to be protected, terminating said discharge from at least a portion of said sources in response to an additional predetermined fire condition in said space, and discharging a fluid extinguishant from said portion of sources towards said fire in response to said additional predetermined fire condition.
Claim 5
Independent Claim
78 words
A method of fighting a fire comprising the steps of discharging a foam extinguishant from a plurality of sources towards the fire in response to a predetermined fire condition in the space to be protected, terminating said discharge from at least a portion of said sources in response to an additional predetermined fire condition in said space, and discharging a fluid extinguishant from said portion of sources towards said fire in response to said additional predetermined fire condition.
Claim 6
Dependent Claim
24 words
The method of claim 1 wherein the discharge of said fluid extinguishant is at a greater rate than the discharge of said foam extinguishant.
Claim 7
Dependent Claim
50 words
The method of claim 1 wherein said step of discharging a foam extinguishant is done in response to a predetermined temperature in said space and wherein said steps of terminating and discharging a fluid extinguishant is done in response to a temperature in said space greater than said predetermined temperature.
Claim 8
Dependent Claim
32 words
The method of claim 1 wherein said fluid extinguishant is a foam forming fluid and wherein said step of discharging a foam extinguishant comprises the step of discharging said foam forming fluid.
Claim 9
Dependent Claim
38 words
The method of claim 6 further comprising the step of circulating the combustion products from said fire in a path including said fire in response to said first predetermined fire condition to cause the foaming of said fluid.
Claim 10
Dependent Claim
30 words
The method of claim 7 wherein said step of discharging a fluid extinguishant includes the step of terminating said circulation of combustion products to terminate the foaming of said fluid.
Claim 11
Dependent Claim
23 words
The method of claim 8 further comprising the step of increasing said discharge of fluid extinguishant in response to said step of terminating.
Claim 12
Dependent Claim
50 words
The method of claim 3 wherein said step of discharging a foam extinguishant is done in response to a predetermined temperature in said space and wherein said steps of terminating and discharging a fluid extinguishant is done in response to a temperature in said space greater than said predetermined temperature.
Claim 13
Dependent Claim
32 words
The method of claim 3 wherein said fluid extinguishant is a foam forming fluid and wherein said step of discharging a foam extinguishant comprises the step of discharging said foam forming fluid.
Claim 14
Dependent Claim
38 words
The method of claim 11 further comprising the step of circulating the combustion products from said fire in a path including said fire in response to said first predetermined fire condition to cause the foaming of said fluid.
Claim 15
Dependent Claim
30 words
The method of claim 12 wherein said step of discharging a fluid extinguishant includes the step of terminating said circulation of combustion products to terminate the foaming of said fluid.
Claim 16
Dependent Claim
23 words
The method of claim 13 further comprising the step of increasing said discharge of fluid extinguishant in response to said step of terminating.
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |