Patent US3916859A successfully refreshed from Google Patents.
US3916859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor anti-ice and oil cooling device
Assignee: Individual
•
Filing: 1975-02-07
•
Granted: 1975-11-04
•
Expires: 1995-02-07
Abstract
Abstract A carburetor anti-icing system in which hot or warm oil is passed through a passageway disposed through the shaft of the carburetor throttle valve thereby warming the valve and preventing icing on the valve and also cooling the oil passing through the shaft.
Inventors
- 👤 Gust S Fossum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:20
CPC Classifications
F; F02; F02M; F02M15/00; F02M15/02; F02M15/022; F02M31/00; F02M31/02; F02M31/04; F02M31/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S261/00; Y10S261/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
217 words
An aircraft engine having an oil lubrication system and a carburetor which includes a base defining a carburetor throat, and an apparatus for preventing carburetor icing comprising: a generally hollow elongated throttle shaft disposed across said carburetor throat and mounted on said carburetor base for rotation about its axis, each end of said shaft including two spaced apart seal grooves, an oil passage groove disposed between said seal grooves, and a plurality of apertures disposed through said shaft within said oil passage groove such that said oil passage groove communicates with the interior of said shaft; a throttle valve disposed within said carburetor throat, coupled to said throttle shaft; four o-ring seals, one disposed in each of said seal grooves; an inlet oil passageway defined by said carburetor base, said inlet passageway terminatIng in one of said oil passage grooves of said throttle shaft, said inlet passageway for receiving oil from said oil lubrication system of said engine; an outlet oil passageway defined by said carburetor base extending from the other of said oil passage groove of said throttle shaft for returning oil from said shaft to said oil lubrication system of said engine; whereby warm oil from said engine may be recirculated in said hollow throttle shaft thereby preventing carburetor icing and also cooling the oil.
Claim 2
Dependent Claim
217 words
An aircraft engine having an oil lubrication system and a carburetor which includes a base defining a carburetor throat, and an apparatus for preventing carburetor icing comprising: a generally hollow elongated throttle shaft disposed across said carburetor throat and mounted on said carburetor base for rotation about its axis, each end of said shaft including two spaced apart seal grooves, an oil passage groove disposed between said seal grooves, and a plurality of apertures disposed through said shaft within said oil passage groove such that said oil passage groove communicates with the interior of said shaft; a throttle valve disposed within said carburetor throat, coupled to said throttle shaft; four o-ring seals, one disposed in each of said seal grooves; an inlet oil passageway defined by said carburetor base, said inlet passageway terminatIng in one of said oil passage grooves of said throttle shaft, said inlet passageway for receiving oil from said oil lubrication system of said engine; an outlet oil passageway defined by said carburetor base extending from the other of said oil passage groove of said throttle shaft for returning oil from said shaft to said oil lubrication system of said engine; whereby warm oil from said engine may be recirculated in said hollow throttle shaft thereby preventing carburetor icing and also cooling the oil.
Claim 3
Dependent Claim
31 words
The apparatus defined by claim 1 including a pair of threaded plug holes in said carburetor base, one communicating with said inlet passageway and the other communicating with said outlet passageway.
Claim 4
Dependent Claim
25 words
The apparatus defined in claim 2 wherein said throttle shaft is generally cylindrical and wherein each end of said shaft extends beyond said carburetor base.
Claim 5
Dependent Claim
51 words
The apparatus defined by claim 3 wherein plugs are disposed in the ends of said hollow shaft such that said shaft defines a volume into which oil may flow from said one of said oil passage grooves and from which oil may leave through said other of said oil passage grooves.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |