US3173697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston assembly
Assignee: Joy Manufacturing Co
•
Filing: 1961-12-07
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Granted: 1965-03-16
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Expires: 1981-12-07
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Doperalski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:54
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/04; F04B39/041; F04B39/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A SEALING RING CONSTRUCTION, AN EXPANSIBLE SEALING RING COMPOSED OF COOPERATING RING SEGMENTS HAVING AN INNER PERIPHERAL CYLINDRICAL SURFACE AND AN OUTER PERIPHERAL SURFACE ADAPTED TO EXPAND INTO CONTACT WITH A CYLINDRICAL SURFACE TO BE SEALED, RESILIENT MEANS MOUNTED ON SAID INNER PERIPHERAL SURFACE OF SAID RING ADAPTED TO YIELDINGLY URGE SAID RING SEGMENTS OUTWARD TO MOVE ALL OF SAID RING SEGMENTS TOWARD FULLY EXPANDED POSITION, RADIAL GROOVES IN SAID RING SEGMENTS EXTENDING FROM SAID OUTER PERIPHERAL SURFACE TO SAID INNER PERIPHERAL SURFACE.
Claim 2
Dependent Claim
84 words
IN A SEALING RING CONSTRUCTION, AN EXPANSIBLE SEALING RING COMPOSED OF COOPERATING RING SEGMENTS HAVING AN INNER PERIPHERAL CYLINDRICAL SURFACE AND AN OUTER PERIPHERAL SURFACE ADAPTED TO EXPAND INTO CONTACT WITH A CYLINDRICAL SURFACE TO BE SEALED, RESILIENT MEANS MOUNTED ON SAID INNER PERIPHERAL SURFACE OF SAID RING ADAPTED TO YIELDINGLY URGE SAID RING SEGMENTS OUTWARD TO MOVE ALL OF SAID RING SEGMENTS TOWARD FULLY EXPANDED POSITION, RADIAL GROOVES IN SAID RING SEGMENTS EXTENDING FROM SAID OUTER PERIPHERAL SURFACE TO SAID INNER PERIPHERAL SURFACE.
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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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |