US3760784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency stop device for an engine supplied by the injection of liquid fuel
Assignee: SOC SURGERIENNE DE CONSTR MECHAN FR
•
Filing: 1972-02-07
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Granted: 1973-09-25
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Expires: 1992-02-07
Abstract
Abstract The supply chamber of the injection pump is provided with a scavenging valve. A supply pump sends fuel through a fuel filter to the supply chamber. A bottle of gas has its mouth sealed by a diaphragm which is pressurized by a percussion mechanism in the case of an accident. The gas is thereby released, flows rapidly through a check-valve into the pipe leading to the supply chamber of the injection pump, sweeps the fuel from this chamber through this scavenging valve and stops the engine.
Inventors
- 👤 J Geantet
- 👤 C Grondel
- 👤 Y Giraudeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:46
CPC Classifications
F; F02; F02M; F02M63/00; F02M63/02; F02M63/0205; F02M63/0215; Y; Y10; Y10S; Y10S123/00; Y10S123/11
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
211 words
Emergency stop device for internal combustion engines whose supply system includes a reservoir of liquid fuel, a primary pump having a suction pipe connected to the fuel reservoir and a delivery pipe, an injection pump having a supply chamber in which said delivery pipe terminates and which is connected to the reservoir through a calibrated valve (called ''''a scavenging valve'''') adapted to be opened when the pressure in said chamber exceeds a predetermined threshold, and at least one injector receiving fuel from the injection pump to introduce it into the engine, said device comprising a hollow body which is arranged to receive the neck of a bottle of pressurized gas, normally closed by a fluid-tight diaphragm, which body has a connecting passage to a point of said delivery pipe, a first check-valve in said passage, a second check-valve situated upstream of said point and a sudden action mechanism positioned so as to pierce said diaphragm in case of accident, whereby in the portion of said delivery pipe situated downstream of said point and in the supply chamber of the injection pump, there is released a rapid and momentary flow of said gas which displaces the fuel therefrom towards the reservoir through the scavenging valve and thus causes stopping of the engine.
Claim 2
Dependent Claim
211 words
Emergency stop device for internal combustion engines whose supply system includes a reservoir of liquid fuel, a primary pump having a suction pipe connected to the fuel reservoir and a delivery pipe, an injection pump having a supply chamber in which said delivery pipe terminates and which is connected to the reservoir through a calibrated valve (called ''''a scavenging valve'''') adapted to be opened when the pressure in said chamber exceeds a predetermined threshold, and at least one injector receiving fuel from the injection pump to introduce it into the engine, said device comprising a hollow body which is arranged to receive the neck of a bottle of pressurized gas, normally closed by a fluid-tight diaphragm, which body has a connecting passage to a point of said delivery pipe, a first check-valve in said passage, a second check-valve situated upstream of said point and a sudden action mechanism positioned so as to pierce said diaphragm in case of accident, whereby in the portion of said delivery pipe situated downstream of said point and in the supply chamber of the injection pump, there is released a rapid and momentary flow of said gas which displaces the fuel therefrom towards the reservoir through the scavenging valve and thus causes stopping of the engine.
Claim 3
Dependent Claim
53 words
Stop device according to claim 1, wherein said mechanism is a percussion mechanism comprising a weight movable between an armed position wherein it is loaded by a spring and retained by a bolt and a released position that it can reach after liberation of said bolt resulting in the piercing of the diaphragm.
Claim 4
Dependent Claim
40 words
Stop device according to claim 1, wherein it comprises the first check-valve as sole element capable of opposing the flow of said gas, which enables it to cooperate with a bottle having a volume corresponding to a single stop operation.
Claim 5
Dependent Claim
13 words
Stop device according to claim 1, wherein said gas is carbonic acid gas.
Claim 6
Dependent Claim
40 words
Stop device according to claim 1, comprising a support on which are mounted, not only the hollow body adapted to receive the bottle in use position, but also a tubular element adapted to receive, in analogous manner, a reserve bottle.
Claim 7
Dependent Claim
34 words
Stop device according to claim 5, wherein the support is arranged in the form of a box shielding the essential elements of the device and provided with openings for the passage of gas bottles.
Claim 8
Dependent Claim
107 words
Stop device according to claim 2, wherein the hollow body comprises, a first cylindrical bore in which the percussion weight is guided and housed, a bush serving as a guide for a pin, which bush is traversed by holes enabling the gas, which comes from the bottle mounted in said body, to reach said point of the delivery pipe and arranged to prevent this gas from arriving at said bore and a second bore which penetrates at a right angle into the first bore and in which said bolt is guided, a nozzle being adapted on the hollow body to ensure the expansion of the scavenging gas.
Claim 9
Dependent Claim
25 words
Stop device according to claim 6, wherein the weight of the percussion mechanism is connected to an arming handle projecting outside of the box-shaped support.
Claim 10
Dependent Claim
31 words
Device according to claim 1, wherein said mechanism is actuated automatically through an electromagnetic transmission or fluid under pressure, by a detector sensitive to accidents necessitating the stopping of the engine.
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |