US3391922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydropneumatic suspension element
Assignee: ZF Friedrichshafen AG
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Filing: 1966-11-22
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Granted: 1968-07-09
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Expires: 1986-11-22
Abstract
No abstract record available.
Inventors
- 👤 Axthammer Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:35
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/044; F; F16; F16F; F16F9/00; F16F9/06; F16F9/08; F16F9/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A HYDROPNEUMATIC SUSPENSION ELEMENT COMPRISING, IN COMBINATION: (A) A CUP-SHAPED VESSEL MEMBER HAVING AN AXIS AND DEFINING A CHAMBER OPEN IN ONE AXIAL DIRECTION; (B) AN OUTER CYLINDER MEMBER PARTLY RECEIVED IN SAID VESSEL MEMBER FOR TELESCOPING AXIAL MOVEMENT RELATIVE TO SAID VESSEL MEMBER INWARD AND OUTWARD OF SAID CHAMBER; (C) A DIAPHRAGM MEMBER OF FLEXIBLE MATERIAL INTERPOSED BETWEEN SAID MEMBERS, SAID DIAPHRAGM MEMBER AND SAID CYLINDER MEMBER SUBSTANTIALLY CLOSING SAID CHAMBER IN SAID ONE AXIAL DIRECTION; (D) A DIVIDER MEMBER MOVABLY MOUNTED IN SAID CYLINDER MEMBER IN SEALING ENGAGEMENT WITH THE CYLINDER MEMBER, SAID DIVIDER MEMBER FROM EACH OTHER, TWO SPACES IN SAID CYLINDER MEMBER FROM EACH OTHER, ONE OF SAID SPACES COMMUNICATING WITH SAID CHAMBER;
Claim 2
Dependent Claim
117 words
A HYDROPNEUMATIC SUSPENSION ELEMENT COMPRISING, IN COMBINATION: (A) A CUP-SHAPED VESSEL MEMBER HAVING AN AXIS AND DEFINING A CHAMBER OPEN IN ONE AXIAL DIRECTION; (B) AN OUTER CYLINDER MEMBER PARTLY RECEIVED IN SAID VESSEL MEMBER FOR TELESCOPING AXIAL MOVEMENT RELATIVE TO SAID VESSEL MEMBER INWARD AND OUTWARD OF SAID CHAMBER; (C) A DIAPHRAGM MEMBER OF FLEXIBLE MATERIAL INTERPOSED BETWEEN SAID MEMBERS, SAID DIAPHRAGM MEMBER AND SAID CYLINDER MEMBER SUBSTANTIALLY CLOSING SAID CHAMBER IN SAID ONE AXIAL DIRECTION; (D) A DIVIDER MEMBER MOVABLY MOUNTED IN SAID CYLINDER MEMBER IN SEALING ENGAGEMENT WITH THE CYLINDER MEMBER, SAID DIVIDER MEMBER FROM EACH OTHER, TWO SPACES IN SAID CYLINDER MEMBER FROM EACH OTHER, ONE OF SAID SPACES COMMUNICATING WITH SAID CHAMBER;
References Cited (Backward Citations)
US3000625A
Cited
US3046003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |