US3175546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive crankcase ventilation
Assignee: Individual
•
Filing: 1963-07-02
•
Granted: 1965-03-30
•
Expires: 1983-07-02
Abstract
No abstract record available.
Inventors
- 👤 John H Roper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:40
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/025; F01M13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A DEVICE FOR USE WITH AN INTERNAL COMBUSTION ENGINE HAVING A CRANKCASE, A CARBURETOR AND AN INLET MANIFOLD CONNECTED BETWEEN THE CARBURETOR AND A COMBUSTION CHAMBER OF THE ENGINE, SAID DEVICE ADAPTED TO VENT BLOWBY GASES FROM SAID CANKCASE AND COMPRISING PRIMARY AND SECONDARY CIRCUITS ADAPTED TO BE CONNECTED IN PARALLEL BETWEEN THE CRANKCASE AND COMBUSTION CHAMBER OF THE INTERNAL COMBUSTION ENGINE, SAID PRIMARY CIRCUIT BEING ADAPTED TO BE CONNECTED TO THE INLET MANIFOLD AND THE SECONDARY CIRCUIT BEING ADAPTED TO BE CONNECTED TO THE AIR INTAKE OF THE CARBURETOR, SAID PRIMARY CIRCUIT INCLUDING CLEANING MEANS CONNECTED IN SERIES THEREWITH, AT LEAST PART OF SAID BLOWBY GASES BEING ADAPTED TO PASS THROUGH SAID CLEANING MEANS WHEREBY SOLID PARTICLES, SLUDGE AND OTHER SUBSTANCES ARE REMOVED FROM SAID BLOWBY GASES, VALVE MEANS IN SAID SECONDARY CIRCUIT, OPERATING MEANS BEING CONNECTED TO SAID VALVE MEANS AND RESPONSIVE TO PRESSURE WITHIN SAID INTAKE MANIFOLD WHEREBY SAID VALVE MEANS IS OPEN WHEN THE PRESSURE IN SAID INTAKE MANIFOLD
Claim 2
Independent Claim
163 words
A DEVICE FOR USE WITH AN INTERNAL COMBUSTION ENGINE HAVING A CRANKCASE, A CARBURETOR AND AN INLET MANIFOLD CONNECTED BETWEEN THE CARBURETOR AND A COMBUSTION CHAMBER OF THE ENGINE, SAID DEVICE ADAPTED TO VENT BLOWBY GASES FROM SAID CANKCASE AND COMPRISING PRIMARY AND SECONDARY CIRCUITS ADAPTED TO BE CONNECTED IN PARALLEL BETWEEN THE CRANKCASE AND COMBUSTION CHAMBER OF THE INTERNAL COMBUSTION ENGINE, SAID PRIMARY CIRCUIT BEING ADAPTED TO BE CONNECTED TO THE INLET MANIFOLD AND THE SECONDARY CIRCUIT BEING ADAPTED TO BE CONNECTED TO THE AIR INTAKE OF THE CARBURETOR, SAID PRIMARY CIRCUIT INCLUDING CLEANING MEANS CONNECTED IN SERIES THEREWITH, AT LEAST PART OF SAID BLOWBY GASES BEING ADAPTED TO PASS THROUGH SAID CLEANING MEANS WHEREBY SOLID PARTICLES, SLUDGE AND OTHER SUBSTANCES ARE REMOVED FROM SAID BLOWBY GASES, VALVE MEANS IN SAID SECONDARY CIRCUIT, OPERATING MEANS BEING CONNECTED TO SAID VALVE MEANS AND RESPONSIVE TO PRESSURE WITHIN SAID INTAKE MANIFOLD WHEREBY SAID VALVE MEANS IS OPEN WHEN THE PRESSURE IN SAID INTAKE MANIFOLD
References Cited (Backward Citations)
US2281124A
Cited
US2652819A
Cited
US2633113A
Cited
US2933075A
Cited
US3072112A
Cited
US3077871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |