US3155015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston bearing-reinforced plastic wear ring
Assignee: Garlock Inc
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Filing: 1961-01-30
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Granted: 1964-11-03
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Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 Genz Orville Ferdnand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:18
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/02; F05; F05C; F05C2225/00; F05C2225/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A PISTON FOR A FLUID PRESSURE CYLINDER, SEALING MEANS DISPOSED ON THE PISTON, AN ANNULAR GROOVE FORMED AROUND THE PISTON BETWEEN SAID SEALING MEANS AND A SOURCE OF FLUID PRESSURE IN A CYLINDER, AND A WEAR RING FORMED OF PLASTIC MATERIAL REINFORCED WITH UNORIENTED FIBERS CARRIED BY THE GROOVE, THE INSIDE DIAMETER OF SAID WEAR RING BEING GREATER THAN THE DIAMETER OF THE GROOVE, SAID WEAR RING BEING FORMED WITH LONGITUDINAL GROOVES IN THE OUTER SURFACE THEREOF.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |