Patent US3179401A successfully refreshed from Google Patents.
US3179401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle telescopic suspension units
Assignee: Armstrong Patents Co Ltd
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Filing: 1963-08-29
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Granted: 1965-04-20
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Expires: 1983-08-29
Abstract
No abstract record available.
Inventors
- 👤 Bartram Mervyn
- 👤 Kershaw James Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:37
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/58; B; B60; B60G; B60G13/00; B60G13/14; B60G15/00; B60G15/02; B60G15/06; B60G15/062; B60G17/00; B60G17/02; B60G17/027; B60G17/0272; B60G17/04; B60G17/044; F16F9/10; F16F9/14; F16F9/16; F16F9/18; Y; Y10; Y10S; Y10S267/00; Y10S267/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A TELESCOPIC HYDRAULIC SUSPENSION UNIT COMPRISING A TELESCOPIC HYDRAULIC SHOCK ABSORBER INCLUDING A CYLINDER WITH A PISTON TELESCOPICALLY ENGAGED IN SAID CYLINDER, DAMPING VALVE MEANS FOR GOVERNING THE MAXIMUM RATE OF DISPLACEMENT OF SAID PISTON IN SAID CYLINDER, AND END CLOSURE MEMBER CLOSING ONE END OF SAID CYLINDER AND AT LEAST IN PART DEFINING A HYDRAULIC RESERVOIR FOR SAID SHOCK ABSORBER, AN OUTER CYLINDER COAXIALLY SURROUNDING THE FIRST CYLINDER AND ALSO CLOSED AT ONE END BY SAID END CLOSURE MEMBER, AND A PLUG MEMBER ENGAGING IN AND CLOSING THE OTHER ENDS OF SAID TWO CYLINDERS AND LOCATING SAID OTHER ENDS RELATIVE TO ONE ANOTHER, THE ANNULAR SPACE BETWEEN SAID TWO CYLINDERS CONSTITUTING A HYDRAULIC CHAMBER IN DIRECT COMMUNICATION WITH SAID RESERVOIR AND CONTAINING SAID DAMPING VALVE MEANS; A COIL SUSPENSION SPRING COAXIALLY SURROUNDING SAID SHOCK ABSORBER AND HAVING ONE END FIXED RELATIVELY TO ONE OF THE TELESCOPICALLY ENGAGING PART OF THE SHOCK ABSORBER; A RAM CYLINDER DEPENDING FROM SAID END CLOSURE MEMBER IN SPACED RELATION AROUND SAID OUTER CYLINDER; A HYDRAULIC RAM IN SAID RAM CYLINDER AND LOCATED IN THE ANNULAR SPACED BETWEEN
Claim 2
Dependent Claim
183 words
A TELESCOPIC HYDRAULIC SUSPENSION UNIT COMPRISING A TELESCOPIC HYDRAULIC SHOCK ABSORBER INCLUDING A CYLINDER WITH A PISTON TELESCOPICALLY ENGAGED IN SAID CYLINDER, DAMPING VALVE MEANS FOR GOVERNING THE MAXIMUM RATE OF DISPLACEMENT OF SAID PISTON IN SAID CYLINDER, AND END CLOSURE MEMBER CLOSING ONE END OF SAID CYLINDER AND AT LEAST IN PART DEFINING A HYDRAULIC RESERVOIR FOR SAID SHOCK ABSORBER, AN OUTER CYLINDER COAXIALLY SURROUNDING THE FIRST CYLINDER AND ALSO CLOSED AT ONE END BY SAID END CLOSURE MEMBER, AND A PLUG MEMBER ENGAGING IN AND CLOSING THE OTHER ENDS OF SAID TWO CYLINDERS AND LOCATING SAID OTHER ENDS RELATIVE TO ONE ANOTHER, THE ANNULAR SPACE BETWEEN SAID TWO CYLINDERS CONSTITUTING A HYDRAULIC CHAMBER IN DIRECT COMMUNICATION WITH SAID RESERVOIR AND CONTAINING SAID DAMPING VALVE MEANS; A COIL SUSPENSION SPRING COAXIALLY SURROUNDING SAID SHOCK ABSORBER AND HAVING ONE END FIXED RELATIVELY TO ONE OF THE TELESCOPICALLY ENGAGING PART OF THE SHOCK ABSORBER; A RAM CYLINDER DEPENDING FROM SAID END CLOSURE MEMBER IN SPACED RELATION AROUND SAID OUTER CYLINDER; A HYDRAULIC RAM IN SAID RAM CYLINDER AND LOCATED IN THE ANNULAR SPACED 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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |