US3166993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston with sealing means
Assignee: Bochumer Eisenhuette Heintzmann GmbH and Co KG
•
Filing: 1962-04-12
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Granted: 1965-01-26
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Expires: 1982-04-12
Abstract
No abstract record available.
Inventors
- 👤 Blenkle Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:41
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3208; E; E21; E21D; E21D15/00; E21D15/14; E21D15/44; F16J9/00; F16J9/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PISTON FOR HYDRAULIC OR LIKE CYLINDERS COMPRISING, IN COMBINATION, A PISTON BODY HAVING AT LEAST A PERIPHERAL PORTION FORMED FROM ELASTICALLY DEFORMABLE MATERIAL; A SEALING LIP INTEGRALLY FORMED WITH SAID ELASTICALLY DEFORMABLE PORTION OF SAID PISTON AND HAVING AN OUTER ANNULAR SURFACE ADAPTED TO ENGAGE THE INNER SURFACE OF THE CYLINDER AND AN INNER ANNULAR SURFACE FACING AWAY FROM THE INNER SURFACE OF THE CLINDER; AND A STRAINING RING THREADEDLY ATTACHED TO SAID PISTON BODY ON THE PRESSURE SIDE THEREOF ADJUSTABLY IN DIRECTION OF THE PISTON AXIS AND BEING FORMED WITH AN ANNULAR PROJECTION MEANS HAVING AN OUTER ANNULAR SURFACE ENGAGING SAID INNER ANNULAR SURFACE OF SAID SEALING LIP FOR ELASTICALLY DEFORMING SAID LIP IN RADIALLY OUTWARD DIRECTION SO AS TO PRESS THE OUTER SURFACE THEREOF TIGHTLY AGAINST THE INNER SURFACE OF SAID CYLINDER.
Claim 2
Dependent Claim
135 words
A PISTON FOR HYDRAULIC OR LIKE CYLINDERS COMPRISING, IN COMBINATION, A PISTON BODY HAVING AT LEAST A PERIPHERAL PORTION FORMED FROM ELASTICALLY DEFORMABLE MATERIAL; A SEALING LIP INTEGRALLY FORMED WITH SAID ELASTICALLY DEFORMABLE PORTION OF SAID PISTON AND HAVING AN OUTER ANNULAR SURFACE ADAPTED TO ENGAGE THE INNER SURFACE OF THE CYLINDER AND AN INNER ANNULAR SURFACE FACING AWAY FROM THE INNER SURFACE OF THE CLINDER; AND A STRAINING RING THREADEDLY ATTACHED TO SAID PISTON BODY ON THE PRESSURE SIDE THEREOF ADJUSTABLY IN DIRECTION OF THE PISTON AXIS AND BEING FORMED WITH AN ANNULAR PROJECTION MEANS HAVING AN OUTER ANNULAR SURFACE ENGAGING SAID INNER ANNULAR SURFACE OF SAID SEALING LIP FOR ELASTICALLY DEFORMING SAID LIP IN RADIALLY OUTWARD DIRECTION SO AS TO PRESS THE OUTER SURFACE THEREOF TIGHTLY AGAINST THE INNER SURFACE OF SAID CYLINDER.
References Cited (Backward Citations)
US289776A
Cited
US1604287A
Cited
US1828056A
Cited
US1773363A
Cited
US2672383A
Cited
US2977167A
Cited
US3040712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |