US3307883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic springs
Assignee: Stabilus Industrie und Handels GmbH
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Filing: 1964-01-14
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Granted: 1967-03-07
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Expires: 1984-01-14
Abstract
No abstract record available.
Inventors
- 👤 Wustenhagen Ernst
- 👤 Gottling Fritz
- 👤 Otto Gunter
- 👤 Roos Wilfried Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:18
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/36; F16F9/362; F16F9/363
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A PNEUMATIC SPRING COMPRISING A CYLINDER HAVING FIRST AND SECOND END WALLS, A PISTON ROD EXTENDING THROUGH SAID SECOND END WALL, A GUIDE BUSH LOCATED IN THE CYLINDER NEAR THE SECOND END WALL OF THE CYLINDER AND SUBJECTED TO PRESSURE OF A GASEOUS FILLING MEDIUM IN THE CYLINDER, FLAT ANNULAR SURFACES ON THE GUIDE BUSH LOCATED AT ONE END OF THE GUIDE BUSH AND SPACED APART FROM EACH OTHER AXIALLY OF THE GUIDE BUSH, A BEARING BUSH HAVING A CYLINDRICAL PORTION EXTENDING THROUGH THE SECOND END WALL OF THE CYLINDER AND SURROUNDING THE PISTON ROD AND HAVING AN ANNULAR FLANGE PORTION LOCATED WITHIN THE CYLINDER AND AXIALLY BETWEEN SAID FLAT ANNULAR SURFACES, A FIRST SEALING RING AXIALLY LOCATED BETWEEN THE SECOND END WALL OF THE CYLINDER ON ONE SIDE AND THE ANNULAR FLANGE PORTION OF THE BEARING BUSH AND ONE OF SAID FLAT ANNULAR SURFACES ON THE OTHER SIDE AND IN ENGAGEMENT THEREWITH, A SECOND SEALING RING AXIALLY LOCATED ON ITS ONE SIDE ADJACENT THE ANNULAR FLANGE
Claim 2
Dependent Claim
167 words
A PNEUMATIC SPRING COMPRISING A CYLINDER HAVING FIRST AND SECOND END WALLS, A PISTON ROD EXTENDING THROUGH SAID SECOND END WALL, A GUIDE BUSH LOCATED IN THE CYLINDER NEAR THE SECOND END WALL OF THE CYLINDER AND SUBJECTED TO PRESSURE OF A GASEOUS FILLING MEDIUM IN THE CYLINDER, FLAT ANNULAR SURFACES ON THE GUIDE BUSH LOCATED AT ONE END OF THE GUIDE BUSH AND SPACED APART FROM EACH OTHER AXIALLY OF THE GUIDE BUSH, A BEARING BUSH HAVING A CYLINDRICAL PORTION EXTENDING THROUGH THE SECOND END WALL OF THE CYLINDER AND SURROUNDING THE PISTON ROD AND HAVING AN ANNULAR FLANGE PORTION LOCATED WITHIN THE CYLINDER AND AXIALLY BETWEEN SAID FLAT ANNULAR SURFACES, A FIRST SEALING RING AXIALLY LOCATED BETWEEN THE SECOND END WALL OF THE CYLINDER ON ONE SIDE AND THE ANNULAR FLANGE PORTION OF THE BEARING BUSH AND ONE OF SAID FLAT ANNULAR SURFACES ON THE OTHER SIDE AND IN ENGAGEMENT THEREWITH, A SECOND SEALING RING AXIALLY LOCATED ON ITS ONE SIDE ADJACENT THE ANNULAR FLANGE
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |