US3721430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel preparation system for carburetor
Assignee: Individual
•
Filing: 1970-10-26
•
Granted: 1973-03-20
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Expires: 1990-10-26
Abstract
Abstract Air supply conduit of predetermined dimensions communicates with each idle port of carburetor with means heating air which passes through conduit to a predetermined temperature. Lateral openings in air supply conduit adjacent idle port receives fuel from fuel supply passageway to supply heated mixture of fuel and air to idle port.
Inventors
- 👤 P Landrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:43
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/08; F02M15/00; F02M15/02; F02M15/04; F02M15/045; F02M23/00; F02M23/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
166 words
In a fuel preparation system for a carburetor having a main air passage for conveying fuel and air to the intake of an internal combustion engine and including a throttle in said air passage and a restricted, laterally disposed idle port communicating with said air passage downstream from said throttle: a. an air supply conduit communicating with said idle port, b. means heating air passing through said air supply conduit to a temperature ranging from approximately 200* F to 230* F, c. there being lateral, radially disposed openings in said air supply conduit adjacent said idle port supplying fuel thereto in a direction generally perpendicular to the path of movement of heated air through said air supply conduit so that said fuel is agitated and then mixed immediately with said heated air adjacent said idle port to produce an integrated mixture of fuel and hot air adjacent the point of entry to said idle port, and d. a fuel supply passageway communicating with said lateral openings.
Claim 2
Dependent Claim
166 words
In a fuel preparation system for a carburetor having a main air passage for conveying fuel and air to the intake of an internal combustion engine and including a throttle in said air passage and a restricted, laterally disposed idle port communicating with said air passage downstream from said throttle: a. an air supply conduit communicating with said idle port, b. means heating air passing through said air supply conduit to a temperature ranging from approximately 200* F to 230* F, c. there being lateral, radially disposed openings in said air supply conduit adjacent said idle port supplying fuel thereto in a direction generally perpendicular to the path of movement of heated air through said air supply conduit so that said fuel is agitated and then mixed immediately with said heated air adjacent said idle port to produce an integrated mixture of fuel and hot air adjacent the point of entry to said idle port, and d. a fuel supply passageway communicating with said lateral openings.
Claim 3
Dependent Claim
33 words
A fuel preparation system as defined in claim 1 in which the total cross sectional area of said lateral openings is equal to substantially the diameter of said idle port squared times 1.25.
Claim 4
Dependent Claim
40 words
A fuel preparation system as defined in claim 1 in which the air supply conduit and the lateral openings are of a size to supply to the idle port an air to fuel ratio ranging from approximately 14.1:1 to 14.7:1.
Claim 5
Dependent Claim
65 words
A fuel preparation system as defined in claim 1 in which two said main air passages are provided with an idle port communicating with each said air passage downstream from a throttle and one end of an air supply conduit communicates with each said idle port with the other ends of the air supply conduits communicating with a common air inlet carrying said heating means.
Claim 6
Dependent Claim
49 words
A carburetor as defIned in claim 1 in which said air supply conduit is an elongated tubular member having a reduced bore portion which delivers heated air to a larger bore portion adjacent the discharge end thereof, with said lateral, radially disposed openings being in said larger bore portion.
Claim 7
Dependent Claim
33 words
A carburetor as defined in claim 5 in which said lateral openings are arranged in oppositely disposed pairs with the streams of fuel delivered from each oppositely disposed pair contacting each other head-on.
Claim 8
Dependent Claim
33 words
A fuel preparation system as defined in claim 5 in which the cross sectional area of said reduced bore portion is equal to substantially the diameter of said idle port squared times 0.7.
Claim 9
Dependent Claim
33 words
A fuel preparation system as defined in claim 5 in which the cross sectional area of said larger bore portion is equal to substantially the diameter of said idle port squared times 1.22.
Claim 10
Dependent Claim
27 words
A fuel preparation system as defined in claim 5 in which said reduced bore portion and said larger bore portion are each approximately one-fourth inch in length.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |