Patent US3139159A successfully refreshed from Google Patents.
US3139159A
Expired / Lapsed
US
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Filling arrangement for a telescopic suspension unit
Assignee: ZF Friedrichshafen AG
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Filing: 1961-05-23
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Granted: 1964-06-30
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Expires: 1981-05-23
Abstract
No abstract record available.
Inventors
- 👤 Lob Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:51
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/43; F16F9/432; F16K; F16K15/00; F16K15/14; F16K15/144
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A TELESCOPIC SUSPENSION UNIT, IN COMBINATION, A CYLINDER MEMBER DEFINING A CYLINDER CAVITY THEREIN, SAID MEMBER INCLUDING A RADIALLY EXTENDING END WALL FORMED WITH AN AXIAL OPENING COMMUNICATING WITH SAID CAVITY; A PISTON MEMBER AXIALLY RECIPROCABLE IN SAID CAVITY, SAID PISTON MEMBER INCLUDING PISTON ROD MEANS EXTENDING THROUGH SAID OPENING FOR MOVEMENT BETWEEN A SPACE OUTWARDLY ADJACENT SAID WALL AND SAID CAVITY WHEN SAID PISTON MEMBER RECIPROCATES, THE RADIAL CROSS SECTION OF SAID ROD MEANS BEING SMALLER THAN THE CROSS SECTION OF SAID OPENING; RESILIENT SEALING MEANS INTERPOSED BETWEEN SAID WALL AND SAID PISTON ROD MEANS, SAID SEALING MEANS BEING RESPONSIVE TO A FLUID PRESSURE DIFFERENTIAL BETWEEN
Claim 2
Dependent Claim
108 words
IN A TELESCOPIC SUSPENSION UNIT, IN COMBINATION, A CYLINDER MEMBER DEFINING A CYLINDER CAVITY THEREIN, SAID MEMBER INCLUDING A RADIALLY EXTENDING END WALL FORMED WITH AN AXIAL OPENING COMMUNICATING WITH SAID CAVITY; A PISTON MEMBER AXIALLY RECIPROCABLE IN SAID CAVITY, SAID PISTON MEMBER INCLUDING PISTON ROD MEANS EXTENDING THROUGH SAID OPENING FOR MOVEMENT BETWEEN A SPACE OUTWARDLY ADJACENT SAID WALL AND SAID CAVITY WHEN SAID PISTON MEMBER RECIPROCATES, THE RADIAL CROSS SECTION OF SAID ROD MEANS BEING SMALLER THAN THE CROSS SECTION OF SAID OPENING; RESILIENT SEALING MEANS INTERPOSED BETWEEN SAID WALL AND SAID PISTON ROD MEANS, SAID SEALING MEANS BEING RESPONSIVE TO A FLUID PRESSURE DIFFERENTIAL BETWEEN
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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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |