US3134602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring
Assignee: Perfect Circle Corp
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Filing: 1962-01-08
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Granted: 1964-05-26
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Expires: 1982-01-08
Abstract
No abstract record available.
Inventors
- 👤 Robert R Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:20
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PISTON RING COMPRISING A STRIP OF METAL WOUND EDGEWISE TO FORM TWO SUBSTANTIALLY FLAT COILS, THE SECTION OF SAID STRIP SUBSTANTIALLY EQUIDISTANT CIRCUMFERENTIALLY FROM THE POINTS OF SAID STRIP BEING OFFSET SIDEWISE AN AMOUNT SUBSTANTIALLY EQUAL TO THE THICKNESS OF SAID STRIP, A CIRCUMFERENTIALLY EXTENDING SLOT FORMED IN SAID STRIP AT SAID OFFSET SECTION INTERMEDIATE THE INNER AND OUTER EDGES OF SAID STRIP, A CIRCUMFERENTIALLY EXTENDING TAB FORMED ON EACH OF SAID POINTS OF SAID STRIP INTERMEDIATE THE INNER AND OUTER EDGES OF SAID STRIP, THE LENGTH OF SAID STRIP BEING SUCH THAT SAID TABS EXTEND INTO SAID SLOT AND OVERLAP EACH OTHER WHEN SAID STRIP IS COMPRESSED WITHIN A CYLINDER, AND SAID SLOT BEING SUFFICIENTLY LONG TO PROVIDE A CLEARANCE BETWEEN THE ENDS OF SAID SLOT AND THE ENDS OF SAID TABS WHEN SAID STRIP IS COMPRESSED WITH A CYLINDER.
Claim 2
Dependent Claim
142 words
A PISTON RING COMPRISING A STRIP OF METAL WOUND EDGEWISE TO FORM TWO SUBSTANTIALLY FLAT COILS, THE SECTION OF SAID STRIP SUBSTANTIALLY EQUIDISTANT CIRCUMFERENTIALLY FROM THE POINTS OF SAID STRIP BEING OFFSET SIDEWISE AN AMOUNT SUBSTANTIALLY EQUAL TO THE THICKNESS OF SAID STRIP, A CIRCUMFERENTIALLY EXTENDING SLOT FORMED IN SAID STRIP AT SAID OFFSET SECTION INTERMEDIATE THE INNER AND OUTER EDGES OF SAID STRIP, A CIRCUMFERENTIALLY EXTENDING TAB FORMED ON EACH OF SAID POINTS OF SAID STRIP INTERMEDIATE THE INNER AND OUTER EDGES OF SAID STRIP, THE LENGTH OF SAID STRIP BEING SUCH THAT SAID TABS EXTEND INTO SAID SLOT AND OVERLAP EACH OTHER WHEN SAID STRIP IS COMPRESSED WITHIN A CYLINDER, AND SAID SLOT BEING SUFFICIENTLY LONG TO PROVIDE A CLEARANCE BETWEEN THE ENDS OF SAID SLOT AND THE ENDS OF SAID TABS WHEN SAID STRIP IS COMPRESSED WITH A CYLINDER.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |