US3170447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring
Assignee: Walker Manufacturing Co
•
Filing: 1963-06-14
•
Granted: 1965-02-23
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Expires: 1983-06-14
Abstract
No abstract record available.
Inventors
- 👤 Louis J Svoren
- 👤 Jr Eugene C Van Eimeren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:51
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; F02B77/10; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/025; F01M13/0011; F01M13/0033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A FLAME STOP FOR A CRANKCASE VENTILATING SYSTEM HAVING A BLOWBY FLOW PASSAGE CONNECTED TO THE CRANKCASE, THE IMPROVEMENT COMPRISING A FLAME STOP FORMED FROM A CONTINUOUS SECTION OF COILED WIRE HAVING A PLURALITY OF SPACED COILS AND BEING MOUNTED WITHIN SAID PASSAGE, THE COILS OF SAID WIRE HAVING A SPACING FORMING A RESTRICTION IN SAID PASSAGE SUFFICIENT TO PREVENT THE PROPAGATION OF FLAME THROUGH THE PASSAGE TO THE CRANKCASE WHILE ALSO HAVING A SPACING PERMITTING FLOW OF BLOWBY THROUGH THE PASSAGE FROM THE CRANKCASE.
Claim 2
Dependent Claim
86 words
IN A FLAME STOP FOR A CRANKCASE VENTILATING SYSTEM HAVING A BLOWBY FLOW PASSAGE CONNECTED TO THE CRANKCASE, THE IMPROVEMENT COMPRISING A FLAME STOP FORMED FROM A CONTINUOUS SECTION OF COILED WIRE HAVING A PLURALITY OF SPACED COILS AND BEING MOUNTED WITHIN SAID PASSAGE, THE COILS OF SAID WIRE HAVING A SPACING FORMING A RESTRICTION IN SAID PASSAGE SUFFICIENT TO PREVENT THE PROPAGATION OF FLAME THROUGH THE PASSAGE TO THE CRANKCASE WHILE ALSO HAVING A SPACING PERMITTING FLOW OF BLOWBY THROUGH THE PASSAGE FROM THE CRANKCASE.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |