US3784174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor for model aircraft
Assignee: Individual
•
Filing: 1972-08-31
•
Granted: 1974-01-08
•
Expires: 1992-08-31
Abstract
Abstract An adjustable friction clutch is provided for the lever arm of the throttle valve permitting it to override when the throttle valve reaches a limit stop thus allowing the rotary arm linking the carburetor to a remote controlled servo mechanism operating the carburetor to reach maximum travel; as a result, unnecessary battery current drain and induced load to the servo mechanism are avoided.
Inventors
- 👤 B Tarnofsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:38
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/34; F02M; F02M19/00; F02M19/12; Y; Y10; Y10S; Y10S261/00; Y10S261/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A carburetor for use with the internal combustion engine of a model aircraft remotely controlled by a servo mechanism comprising housing means having a passageway therethrough; fuel inlet means to discharge fuel in said passageway to form a fuel mixture therein; throttle valve means transversely mounted in said passageway for controlling the flow of fuel mixture through the passageway, said throttle valve means including a pair of opposite end sections rotatably supported in said housing means; lever means having one end operatively connected to a first of said pair of end sections of said throttle valve means and having the other end operatively linked to the servo mechanism of the model aircraft; and friction clutch means mounted on said first end section of the throttle valve means allowing said lever means to override after said throttle valve means have moved through a preset limit thereby avoiding unnecessary battery current drain and induced load to the servo mechanism in the model aircraft.
Claim 2
Dependent Claim
161 words
A carburetor for use with the internal combustion engine of a model aircraft remotely controlled by a servo mechanism comprising housing means having a passageway therethrough; fuel inlet means to discharge fuel in said passageway to form a fuel mixture therein; throttle valve means transversely mounted in said passageway for controlling the flow of fuel mixture through the passageway, said throttle valve means including a pair of opposite end sections rotatably supported in said housing means; lever means having one end operatively connected to a first of said pair of end sections of said throttle valve means and having the other end operatively linked to the servo mechanism of the model aircraft; and friction clutch means mounted on said first end section of the throttle valve means allowing said lever means to override after said throttle valve means have moved through a preset limit thereby avoiding unnecessary battery current drain and induced load to the servo mechanism in the model aircraft.
Claim 3
Dependent Claim
34 words
A carburetor as defined in claim 1 further comprising scond lever means for manually controlling said throttle valve means whereby carburetor adjustment is made possible independently of the servo mechanism of the model aircraft.
Claim 4
Dependent Claim
24 words
A carburetor as defined in claim 2 wherein said second lever means are secured on the opposite end section of said throttle valve means.
Claim 5
Dependent Claim
53 words
A carburetor as defined in claim 1 wherein said opposite end section of said throttle valve means includes a groove, and screw means mounted in said housing means cooperating with an inner surface of said groove for providing said preset limit for the rotation of said throttle valve means in said housing means.
Claim 6
Dependent Claim
14 words
A carburetor as defined in claim 1 wherein said friction clutch means are adjustable.
Claim 7
Dependent Claim
90 words
A carburetor as defined in claim 1 further comprising a fuel metering assembly for connection with at least one of said fuEl inlet means, said assembly comprising a member adapted for connection with said housing means, said member having a central passageway receiving therein a needle valve having a tapered end, said member further comprising a second passageway for receiving fuel, said tapered end being adjustably positioned adjacent said second passageway whereby said assembly may be removed and reassembled from said housing means without affecting the original needle valve setting.
Claim 8
Dependent Claim
31 words
A carburetor as defined in claim 1 wherein said inlet means include a high-speed fuel passage above said throttle valve means, and a low-speed fuel passage adjacent said throttle valve means.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |