Patent US3216343A successfully refreshed from Google Patents.
US3216343A
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Assignee: Farr Co
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Filing: 1963-08-05
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Granted: 1965-11-09
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Expires: 1983-08-05
Abstract
No abstract record available.
Inventors
- 👤 Richard S Farr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:00
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN A CAP FOR THE UPSTANDING OPEN END OF A VERTICAL EXHAUST PIPE, THE COMBINATION OF: A CYLINDRICAL HOUSING HAVING UPPER AND LOWER OPEN ENDS, THE SAID LOWER END FOR MOUNTING ON THE OPEN END OF THE EXHAUST PIPE, A PAIR OF TABS MOUNTED ON THE EXTERIOR OF SAID HOUSING, SAID TABS BEING DIAMETRICALLY SPACED AND HAVING A PORTION PROJECTING AXIALLY BEYOND SAID UPPER END, A SHAFT MOUNTED ON SAID PROJECTING PORTION OF THE TABS PERPENDICULAR TO THE AXIS OF THE HOUSING, A PAIR OF SEMI-CIRCULAR MEMBERS FITTED OVER SAID UPPER END OF THE HOUSING, EACH SAID MEMBER HAVING DIAMETRIC EDGE, SAID EDGES BEING ADJACENT EACH OTHER AND PARALLEL TO SAID SHAFT, HINGE MEANS ALONG EACH OF SAID EDGES PROJECTING UPWARDLY FOR PIVOTALLY MOUNTING SAID MEMBERS ON SAID SHAFT, AND A COUNTERWEIGHT MEANS ON EACH MEMBER WITHIN SAID HOUSING AND EXTENDING PAST THE SAID DIAMETRIC EDGE OF THAT MEMBER WHEREBY THE MEMBERS ARE NORMALLY SUBSTANTIALLY HORIZONTAL FOR CLOSING THE UPPER END OF THE HOUSING AND MAY BE PIVOTED TO A VERTICAL OR OPEN POSITION.
Claim 2
Dependent Claim
174 words
IN A CAP FOR THE UPSTANDING OPEN END OF A VERTICAL EXHAUST PIPE, THE COMBINATION OF: A CYLINDRICAL HOUSING HAVING UPPER AND LOWER OPEN ENDS, THE SAID LOWER END FOR MOUNTING ON THE OPEN END OF THE EXHAUST PIPE, A PAIR OF TABS MOUNTED ON THE EXTERIOR OF SAID HOUSING, SAID TABS BEING DIAMETRICALLY SPACED AND HAVING A PORTION PROJECTING AXIALLY BEYOND SAID UPPER END, A SHAFT MOUNTED ON SAID PROJECTING PORTION OF THE TABS PERPENDICULAR TO THE AXIS OF THE HOUSING, A PAIR OF SEMI-CIRCULAR MEMBERS FITTED OVER SAID UPPER END OF THE HOUSING, EACH SAID MEMBER HAVING DIAMETRIC EDGE, SAID EDGES BEING ADJACENT EACH OTHER AND PARALLEL TO SAID SHAFT, HINGE MEANS ALONG EACH OF SAID EDGES PROJECTING UPWARDLY FOR PIVOTALLY MOUNTING SAID MEMBERS ON SAID SHAFT, AND A COUNTERWEIGHT MEANS ON EACH MEMBER WITHIN SAID HOUSING AND EXTENDING PAST THE SAID DIAMETRIC EDGE OF THAT MEMBER WHEREBY THE MEMBERS ARE NORMALLY SUBSTANTIALLY HORIZONTAL FOR CLOSING THE UPPER END OF THE HOUSING AND MAY BE PIVOTED TO A VERTICAL OR OPEN POSITION.
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |