US3189986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of keying together an annular piston ring and a back-up element
Assignee: Individual
•
Filing: 1963-11-13
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Granted: 1965-06-22
•
Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 George C Mayfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:36
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/08; F; F16; F16J; F16J9/00; F16J9/06; F16J9/064; F16J9/066; F16J9/067; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T29/49274; Y10T29/49758; Y10T29/49826; Y10T29/49861; Y10T29/49863; Y10T29/49876
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE METHOD OF KEYING TOGETHER AN ANNULAR CYLINDERENGAGING PISTON RING AND A BACK-UP ELEMENT FOR DELIVERING AN EXPANSIVE FORCE TO SAID RING, SAID METHOD COMPRISING, (A) PROVIDING SAID BACK-UP ELEMENT WITH A SERIES OF KNIFE EDGE BEARING POINTS TO ENGAGE THE INNER PERIPHERY OF SAID PISTON RING AND TRANSMIT EXPANSIVE FORCES THERETO, SAID KNIFE EDGE BEARING POINTS BEING MORE RESISTANT TO WEAR AGAINST SAID INNER PERIPHERY THAN THE LATTER IS RESISTANT TO WEAR AGAINST THE FORMER, (B) MOUNTING SAID PISTON RING AND SAID BACKUP ELEMENT IN A PISTON RING GROOVE WITH SAID KNIFE EDGE BEARING POINTS IN ENGAGEMENT WITH THE INNER PERIPHERY OF SAID RING, SAID RING HAVING SUFFICIEINT CLEAR-
Claim 2
Independent Claim
110 words
THE METHOD OF KEYING TOGETHER AN ANNULAR CYLINDERENGAGING PISTON RING AND A BACK-UP ELEMENT FOR DELIVERING AN EXPANSIVE FORCE TO SAID RING, SAID METHOD COMPRISING, (A) PROVIDING SAID BACK-UP ELEMENT WITH A SERIES OF KNIFE EDGE BEARING POINTS TO ENGAGE THE INNER PERIPHERY OF SAID PISTON RING AND TRANSMIT EXPANSIVE FORCES THERETO, SAID KNIFE EDGE BEARING POINTS BEING MORE RESISTANT TO WEAR AGAINST SAID INNER PERIPHERY THAN THE LATTER IS RESISTANT TO WEAR AGAINST THE FORMER, (B) MOUNTING SAID PISTON RING AND SAID BACKUP ELEMENT IN A PISTON RING GROOVE WITH SAID KNIFE EDGE BEARING POINTS IN ENGAGEMENT WITH THE INNER PERIPHERY OF SAID RING, SAID RING HAVING SUFFICIEINT CLEAR-
References Cited (Backward Citations)
US3004811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |