US3734072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel control means for a model engine
Assignee: Individual
•
Filing: 1972-06-16
•
Granted: 1973-05-22
•
Expires: 1992-06-16
Abstract
Abstract Fuel control means for a model engine in which intake air is pre-compressed in a crank chamber of the engine, said fuel control means comprising a pressure responsive fuel control valve provided between a fuel tank and fuel injection nozzle means of the engine, the pressure in the crank chamber being introduced into the valve so as to control its opening in accordance with the crank chamber pressure. The crank chamber pressure is also introduced into the fuel tank so that the fuel in the tank is forced under pressure through the pressure responsive fuel control valve into the engine.
Inventors
- 👤 S Yamda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:15
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/04; F02M37/12; F02B; F02B75/00; F02B75/34; F02B9/00; F02B9/06; F02B75/02; F02B2075/022; F02B2075/025; Y; Y10; Y10S; Y10S123/00; Y10S123/03; Y10S123/05
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
Fuel control means for a model engine including a cylinder, a crankcase defining a crank chamber, a piston disposed in said cylinder for reciprocating movement, a crank shaft connected with said piston through a connecting rod, an intake passage which is in communication with the crank chamber, and an intake port means communicating with the crank chamber and opening into the cylinder whereby fuel-air mixture is passed through the intake passage into the crank chamber to be compressed therein and thereafter through the intake port means into the cylinder, characterized by the fact that said fuel control means comprises a pressure responsive fuel control valve provided between a fuel tank and fuel injection nozzle means of the engine, and means for introducing the pressure in the crank chamber of the engine to the pressure responsive fuel control valve so that the opening of the valve is increased in accordance with the increase in the crank chamber pressure.
Claim 2
Dependent Claim
157 words
Fuel control means for a model engine including a cylinder, a crankcase defining a crank chamber, a piston disposed in said cylinder for reciprocating movement, a crank shaft connected with said piston through a connecting rod, an intake passage which is in communication with the crank chamber, and an intake port means communicating with the crank chamber and opening into the cylinder whereby fuel-air mixture is passed through the intake passage into the crank chamber to be compressed therein and thereafter through the intake port means into the cylinder, characterized by the fact that said fuel control means comprises a pressure responsive fuel control valve provided between a fuel tank and fuel injection nozzle means of the engine, and means for introducing the pressure in the crank chamber of the engine to the pressure responsive fuel control valve so that the opening of the valve is increased in accordance with the increase in the crank chamber pressure.
Claim 3
Dependent Claim
55 words
Fuel control means in accordance with claim 1, in which said fuel tank is a shielded tank and means is provided for introducing the pressure in the crank chamber into the fuel tank through non-return valve means so that the fuel in the tank is forced under pressure through said control valve into the engine.
Claim 4
Dependent Claim
42 words
Fuel control means in accordance with claim 1 in which said pressure responsive fuel control valve includes a pressure responsive diaphragm which is connected to a valve member for controlling the opening of the valve in accordance with the crank chamber pressure.
Claim 5
Dependent Claim
107 words
Fuel control means in accordance with claim 1 in which said crank shaft is formed with an axial bore opening into the crank chamber and a slot is formed in the crank shaft in such a position that it connects the intake passage to the crank chamber at a suitable timing during the compression stroke of the engine, and said means for introducing the crank chamber pressure into the fuel control valve includes a port provided in the engine at such a position that it is brought into communication with said slot in the crank shaft at least when positive pressure is produced in the crank chamber.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |