Patent US3853180A successfully refreshed from Google Patents.
US3853180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating heads for fire extinguishers
Assignee: INTERCONTINENTAL EQUIP CORP
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Filing: 1973-10-12
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Granted: 1974-12-10
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Expires: 1993-10-12
Abstract
Abstract An operating head for a fire extinguisher containing pressurised fire extinguishing medium comprises a housing in which is slidably mounted a carriage mounting an electrically operable detonator arranged to explosively drive a hollow pin to break the seal of the extinguisher and allow discharge of the contents through a chamber and outlet passage.
Inventors
- 👤 L Harris
- 👤 Aprix E D
- 👤 E Thorpe
- 👤 J Wellborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:06
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/003
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
In a fire extinguisher of the kind containing an extinguishing medium under pressure, an operating head comprising a housing, a carriage slidably mounted in said housing, a hollow pin movably mounted on said carriage, an electrically operated detonator mounted on said carriage and disposed on detonation to drive said hollow pin through a seal to provide a flow path for discharge of the extinguishing medium, and manually operable means for selectively sliding said carriage to drive the pin manually through said seal to provide said flow path.
Claim 2
Dependent Claim
87 words
In a fire extinguisher of the kind containing an extinguishing medium under pressure, an operating head comprising a housing, a carriage slidably mounted in said housing, a hollow pin movably mounted on said carriage, an electrically operated detonator mounted on said carriage and disposed on detonation to drive said hollow pin through a seal to provide a flow path for discharge of the extinguishing medium, and manually operable means for selectively sliding said carriage to drive the pin manually through said seal to provide said flow path.
Claim 3
Dependent Claim
17 words
An operating head according to claim 1, in which said pin is resiliently mounted in said carriage.
Claim 4
Dependent Claim
21 words
An operating head according to claim 1, in which said manually operable means comprises a pair of hand grips squeezable together.
Claim 5
Dependent Claim
28 words
An operating head according to claim 1, in which said manually operable means comprises an operating lever adapted to be actuated by means extending to a remote position.
Claim 6
Dependent Claim
29 words
An operating head according to claim 1, in which said housing defines a chamber and an outlet therefrom, which provide a flow path for discharge of the extinguishing medium.
Claim 7
Dependent Claim
34 words
An operating head according to claim 1, in which the detonator is associated with a thermostat which is arranged upon a predetermined temperature being reached to complete an electric circuit to fire the detonator.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |