Patent US3339966A successfully refreshed from Google Patents.
US3339966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifting grapple with outside gripper for handling concrete drainage rings
Assignee: Individual
•
Filing: 1964-11-23
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Granted: 1967-09-05
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Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Erna L Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:47
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/42; B66C1/44; B66C1/442; B66C1/62; B66C1/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A LIFTING DEVICE FOR HANDLING CYLINDRICAL OBJECTS, COMPRISING A GENERALLY POLYGONAL FRAME DEFINING APEXES AND HAVING A PLURALITY OF RADIAL SUPPORT ARMS JOINED TO SAID FRAME AT RESPECTIVE APEXES THEREOF, A PLURALITY OF LEVER ARMS PIVOTALLY MOUNTED ON RESPECTIVE ONES OF SAID SUPPORT ARMS, SHOE MEANS MOUNTED AT THE RADIAL OUTER ENDS OF SAID LEVER ARMS FOR ENGAGING AN OUTER WALL OF THE OBJECT TO BE LIFTED, SAID LEVER ARMS HAVING COUNTERWEIGHT MEANS AT THEIR INNER RADIAL ENDS FOR NORMALLY URGING SAID OUTER ENDS UPWARDLY, AND CONTROL MEANS FOR SIMULTANEOUSLY LIFTING SAID INNER ENDS OF SAID LEVER ARMS IN OPPOSITION TO THE WEIGHT OF SAID COUNTER WEIGHTS SO AS TO LOWER THE SHOE MEANS INTO ENGAGING POSITION RELATIVE TO SAID OUT-
Claim 2
Dependent Claim
121 words
A LIFTING DEVICE FOR HANDLING CYLINDRICAL OBJECTS, COMPRISING A GENERALLY POLYGONAL FRAME DEFINING APEXES AND HAVING A PLURALITY OF RADIAL SUPPORT ARMS JOINED TO SAID FRAME AT RESPECTIVE APEXES THEREOF, A PLURALITY OF LEVER ARMS PIVOTALLY MOUNTED ON RESPECTIVE ONES OF SAID SUPPORT ARMS, SHOE MEANS MOUNTED AT THE RADIAL OUTER ENDS OF SAID LEVER ARMS FOR ENGAGING AN OUTER WALL OF THE OBJECT TO BE LIFTED, SAID LEVER ARMS HAVING COUNTERWEIGHT MEANS AT THEIR INNER RADIAL ENDS FOR NORMALLY URGING SAID OUTER ENDS UPWARDLY, AND CONTROL MEANS FOR SIMULTANEOUSLY LIFTING SAID INNER ENDS OF SAID LEVER ARMS IN OPPOSITION TO THE WEIGHT OF SAID COUNTER WEIGHTS SO AS TO LOWER THE SHOE MEANS INTO ENGAGING POSITION RELATIVE TO SAID OUT-
References Cited (Backward Citations)
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US2368978A
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US2437485A
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US3257141A
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |