Patent US3646924A successfully refreshed from Google Patents.
US3646924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel system for gaseous fueled engines
Assignee: International Materials
•
Filing: 1971-03-23
•
Granted: 1972-03-07
•
Expires: 1991-03-23
Abstract
Abstract A gaseous fueled engine has a dual fuel feed system which provides a lean fuel-air mixture for starting the engine when it is cold and a richer mixture for starting or operating the engine after it is already warmed up.
Inventors
- 👤 Marc S Newkirk
- 👤 W Peter Zulkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:13
CPC Classifications
F; F02; F02M; F02M21/00; F02M21/02; F02M21/04; F02M21/042; F02D; F02D19/00; F02D19/02; F02D19/021; F02D19/023; F02M21/0203; F02M21/0206; F02M26/00; F02M26/13; F02M26/17; F02M26/19; F02B; F02B1/00; F02B1/02; F02B1/04; F02B43/00; F02M21/0218; F02M21/023; F02M21/0239; F02M21/0287; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30; Y10; Y10S; Y10S123/00; Y10S123/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
In a gaseous-fueled internal combustion engine including engine combustion chambers, a carburetor and a gas supply, the improvement comprising A. at least two conduits connected in parallel between the supply and the carburetor, and B. control means for directing the gas alternatively to one of said conduits or another of said conduits, said control means being responsive to engine temperature so that when the engine temperature is below a selected value, gas flows through the one conduit to the carburetor and when the engine temperature is above the selected value, the gas flows to the carburetor through the other conduit.
Claim 2
Dependent Claim
100 words
In a gaseous-fueled internal combustion engine including engine combustion chambers, a carburetor and a gas supply, the improvement comprising A. at least two conduits connected in parallel between the supply and the carburetor, and B. control means for directing the gas alternatively to one of said conduits or another of said conduits, said control means being responsive to engine temperature so that when the engine temperature is below a selected value, gas flows through the one conduit to the carburetor and when the engine temperature is above the selected value, the gas flows to the carburetor through the other conduit.
Claim 3
Dependent Claim
42 words
The engine defined in claim 1 and further including adjustable fluid pressure regulators in the one conduit and the other conduit, one of said regulators being adjustable over a relatively wide range, and the other regulator being adjustable over a narrower range.
Claim 4
Dependent Claim
24 words
operatively associated with the check valve so as to close the valve when the oil pressure in the engine is below a determined value.
Claim 5
Dependent Claim
24 words
operatively associated with the check valve so as to close the valve when the oil pressure in the engine is below a determined value.
Claim 6
Dependent Claim
55 words
The engine defined in claim 2 A. wherein the carburetor includes a valve for adjusting the intake of air into the carburetor, and B. further including means mechanically linking the control means and the valve in the carburetor so that when the gas flow to the carburEtor is changed, the airflow thereto is changed correspondingly.
Claim 7
Dependent Claim
21 words
The engine defined in claim 2 wherein the adjustment of the pressure regulators is accomplished by a single throttle control element.
Claim 8
Dependent Claim
44 words
The engine defined in claim 1 wherein the control means comprise A. a switch responsive to engine temperature, and B. a separate solenoid-operated valve in each of said conduits connected to the switch so that the valves operate out of phase with each other.
Claim 9
Dependent Claim
25 words
The engine defined in claim 1 and further including A. an electrically operated valve connected at the gas supply outlet, and B. a pressure-responsive switch,
Claim 10
Dependent Claim
47 words
The engine defined in claim 1 and further including A. a separate fuel line leading from the supply to the carburetor for feeding gas thereto when the engine is idling, and B. means in the separate line for regulating the amount of gas fed to the carburetor.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |