Patent US3561409A successfully refreshed from Google Patents.
US3561409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary device for carburetor engines for preparing the fuel condensate
Assignee: Individual
•
Filing: 1968-05-06
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Granted: 1971-02-09
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Expires: 1988-05-06
Abstract
Abstract An auxiliary air intake for combustion engines which responds to pressure differentials between an air intake conduct of the engine and the atmosphere. The auxiliary air intake admits sufficient air to substantially completely burn hydrocarbons present in the fuel-air mixture in the engine intake conduct and which would otherwise be exhausted into the atmosphere where they form undesirable pollutants.
Inventors
- 👤 Paul August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:16
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/12; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
The improvement defined in claim 1 wherein said first and second means comprise a housing having a bore therethrough and being adapted for fastening to said carburetor and conduit with said bore in flow registration with said throat and conduit, said first and second passage being formed in said housing and terminating in a port in said bore, and said first and second valves being carried by said housing in flow interrupting relation across said passages.
Claim 2
Dependent Claim
27 words
The improvement defined in claim 1, said housing being formed with an internal shoulder in said bore on the upstream side of and adjacent to said port.
Claim 3
Dependent Claim
23 words
The improvement defined in claim 3, wherein said shoulder is of annular form having an inner wall convergently tapered in a downstream direction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |