Patent US3568774A successfully refreshed from Google Patents.
US3568774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic fire-extinguishing device for automobiles, among other uses
Assignee: Individual
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Filing: 1968-12-02
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Granted: 1971-03-09
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Expires: 1988-12-02
Abstract
Abstract Automatic fire extinguishing device for automobiles, among other uses, whose feeding of ejection parts or nozzles-from the extinguishing fluid container- is controlled by a main valve that is controlled by at least one pilot valve actuated by a heat detector, making it possible to stop immediately any fire breaking out and, consequently, to avoid the entire burning of the vehicle. The fluid used for the control of the main valve, the control pressure of which is set by the pilot valve, is the extinguishing fluid. The main valve includes a piston which is displaced by the control fluid, the purpose of said piston being on the one hand to open the feeding valve of the ejection parts, and, on the other hand, to control a changeover switch placed in the electric circuit of the vehicle.
Inventors
- 👤 Andre Michel Meoule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:36
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/07; A62C13/00; A62C13/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
An automatic fire extinguishing device for automobiles among other uses, comprising a sealed tank for fire extinguishing fluid under pressure, nozzles, a normally closed main valve having an inlet connected with said tank and having an outlet connected with said nozzles, said valve including a piston for opening the valve, a normally closed pilot valve having an inlet connected with said tank and having an outlet, a conduit connecting the pilot valve outlet with said piston, a normally closed electric switch adapted to be connected into an automobile ignition circuit, a heat detector operatively connected with the pilot valve for opening it when the detector is exposed to a predetermined high temperature, whereupon fire extinguishing fluid from the pilot valve will flow through said conduit and move said piston to open the main valve in order to connect said tank with the nozzles, and means actuated by the moving piston for opening said switch.
Claim 2
Dependent Claim
154 words
An automatic fire extinguishing device for automobiles among other uses, comprising a sealed tank for fire extinguishing fluid under pressure, nozzles, a normally closed main valve having an inlet connected with said tank and having an outlet connected with said nozzles, said valve including a piston for opening the valve, a normally closed pilot valve having an inlet connected with said tank and having an outlet, a conduit connecting the pilot valve outlet with said piston, a normally closed electric switch adapted to be connected into an automobile ignition circuit, a heat detector operatively connected with the pilot valve for opening it when the detector is exposed to a predetermined high temperature, whereupon fire extinguishing fluid from the pilot valve will flow through said conduit and move said piston to open the main valve in order to connect said tank with the nozzles, and means actuated by the moving piston for opening said switch.
Claim 3
Dependent Claim
53 words
An automatic fire extinguishing device according to claim 1, in which said switch-opening means include a pivoted lever, a rod connected with said piston and normally holding said lever in switch-closing position, and a spring urging the lever to switch-opening position when said movement of the piston retracts said rod from the lever.
Claim 4
Dependent Claim
57 words
An automatic fire extinguishing device according to claim 1, in which said detector is a sealed container filled with a heat expansible fluid, and said pilot valve includes a chamber having a movable wall for opening that valve, the fluid in said detector being connected with said chamber for moving said wall when the detector fluid expands.
Claim 5
Dependent Claim
44 words
An automatic fire extinguishing device according to claim 3, in which the pilot valve includes a normally sealed closure member between its inlet and outlet, and a rod between said member and movable wall and movable by the wall for unseating the closure member.
Claim 6
Dependent Claim
35 words
An automatic fire extinguishing device according to claim 1, in which the pilot valve includes a normally sealed closure member between its inlet and outlet, and an adjustable spring pressing said member against its seat.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |