US3179400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsion spring
Assignee: Lord Manufacturing Co
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Filing: 1963-06-11
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Granted: 1965-04-20
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Expires: 1983-06-11
Abstract
No abstract record available.
Inventors
- 👤 Alvin S Krotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:12
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/22; B60G11/23
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
167 words
A ROAD VEHICLE HAVING A LOAD CARRYING STRUCTURE SUPPORTED FROM A ROAD WHEEL BY A WHEEL SUPPORT ARM HAVING ONE END PROVIDING WITH JOURNAL MEANS FOR THE WHEEL, A HUB HAVING ONE END FIXED TO SAID STRUCTURE AND HAVING THE OTHER END PROJECTING FROM SAID STRUCTURE, THE OTHER END OF THE ARM BEING TELESCOPED OVER THE OTHER END OF THE HUB, AT LEAST ONE PAIR OF AXIALLY SPACED CONIC SPRINGS, EACH SPRING HAVING AXIALLY SPACED CONIC LOAD TRANSMITTING AND LOAD RECEIVING MEMBERS COAXIAL WITH AND TELESCOPED OVER THE HUB AND GENERALLY PARALLEL TO EACH OTHER AND THE APEX OF ONE SPRING OF THE PAIR BEING OPPOSED TO THE APEX OF THE OTHER SPRING OF THE PAIR, EACH CONIC SPRING COMPRISING ALTERNATE CONIC LAYERS OF ELASTOMER AND RIGID MATERIAL SANDWICHED BETWEEN AND BONDED TO LOAD TRANSMITTING AND LOAD RECEIVING MEMBERS AND TO EACH OTHER, MEANS FOR ATTACHING THE LOAD RECEIVING MEMBERS TO SAID HUB AND THE LOAD TRANSMITTING MEMBERS TO THE OTHER END OF THE WHEEL SUPPORT ARM.
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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 |