Patent US3290700A successfully refreshed from Google Patents.
US3290700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift leg structure
Assignee: American Seating Co
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Filing: 1966-01-10
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Granted: 1966-12-13
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Expires: 1986-01-10
Abstract
No abstract record available.
Inventors
- 👤 Chester J Barecki
- 👤 Robert L Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:51
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/002; A61G7/012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A LIFT DEVICE, TELESCOPING INNER AND OUTER CYLINDRICAL LEGS, SAID INNER LEG BEING ADAPTED TO REST UPON THE FLOOR AND HAVING A VERTICAL PORTION THEREOF TURNED INWARDLY TO PROVIDE A GROOVED KEYWAY BEARING, SAID OUTER LEG BEING FIXED TO A MEMBER TO BE LIFTED AND PROVIDED WITH A SLOT AND WITH RADIALLY-EXTENDING FLANGES PROVIDING A SHEAVE BEARING, A SHEAVE BETWEEN SAID FLANGES, A TRANSVERSE SHEAVE PIN EXTENDING THROUGH SAID FLANGES AND SHEAVE, SAID SHEAVE EXTENDING INTO SAID KEYWAY FOR ENGAGEMENT THEREWITH AS A KEY, AND A TENSION ELEMENT EXTENDING ABOUT SAID SHEAVE AND WITHIN SAID KEYWAY AND HAVING ITS END FIXED TO AN UPPER PORTION OF SAID INNER LEG.
Claim 2
Dependent Claim
110 words
IN A LIFT DEVICE, TELESCOPING INNER AND OUTER CYLINDRICAL LEGS, SAID INNER LEG BEING ADAPTED TO REST UPON THE FLOOR AND HAVING A VERTICAL PORTION THEREOF TURNED INWARDLY TO PROVIDE A GROOVED KEYWAY BEARING, SAID OUTER LEG BEING FIXED TO A MEMBER TO BE LIFTED AND PROVIDED WITH A SLOT AND WITH RADIALLY-EXTENDING FLANGES PROVIDING A SHEAVE BEARING, A SHEAVE BETWEEN SAID FLANGES, A TRANSVERSE SHEAVE PIN EXTENDING THROUGH SAID FLANGES AND SHEAVE, SAID SHEAVE EXTENDING INTO SAID KEYWAY FOR ENGAGEMENT THEREWITH AS A KEY, AND A TENSION ELEMENT EXTENDING ABOUT SAID SHEAVE AND WITHIN SAID KEYWAY AND HAVING ITS END FIXED TO AN UPPER PORTION OF SAID INNER LEG.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |