US3677240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase ventilation
Assignee: Old Carco LLC
•
Filing: 1970-11-18
•
Granted: 1972-07-18
•
Expires: 1990-11-18
Abstract
Abstract An aspirator is included in a crankcase ventilator conduit extending between the crankcase and carburetor air cleaner for drawing air into the conduit when vapors flow therethrough from the crankcase thereby diluting them.
Inventors
- 👤 Jorma O Sarto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:07
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/025; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
In an emission control system for internal combustion engines having an engine intake manifold and a carburetor air cleaner, wherein the crankcase serves to collect fuel vapors and blow-by vapors which are subsequently transferred to the engine intake manifold by means of a crankcase ventilator conduit connected between the crankcase and the intake manifold and a back-up conduit connected between the crankcase and the carburetor air cleaner, the improvement comprising the addition of Bernoulli aspirator means in the back-up conduit whereby air is aspirated into the conduit when vapors from the crankcase flow therethrough and the dilution of the vapors by the air is accomplished before the vapors enter the carburetor air cleaner.
Claim 2
Dependent Claim
113 words
In an emission control system for internal combustion engines having an engine intake manifold and a carburetor air cleaner, wherein the crankcase serves to collect fuel vapors and blow-by vapors which are subsequently transferred to the engine intake manifold by means of a crankcase ventilator conduit connected between the crankcase and the intake manifold and a back-up conduit connected between the crankcase and the carburetor air cleaner, the improvement comprising the addition of Bernoulli aspirator means in the back-up conduit whereby air is aspirated into the conduit when vapors from the crankcase flow therethrough and the dilution of the vapors by the air is accomplished before the vapors enter the carburetor air cleaner.
Claim 3
Dependent Claim
21 words
The system according to claim 1 wherein the aspirator means comprises an opening in the back-up conduit intermediate the ends thereof.
Claim 4
Dependent Claim
18 words
The system according to claim 1 wherein the aspirator means comprises a complete break in the back-up conduit.
Claim 5
Dependent Claim
42 words
The system according to claim 1 including check valve means in the back-up conduit for admitting air thereto when the flow in the conduit is directed to the crankcase, the check valve means being located between the aspirator means and the crankcase.
References Cited (Backward Citations)
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US2818052A
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US3166061A
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US3209738A
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |