US3207475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for stepwise lifting of hoisting cranes preferably tower cranes
Assignee: BYGGFORBATTRING AB
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Filing: 1964-12-10
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Granted: 1965-09-21
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Expires: 1984-12-10
Abstract
No abstract record available.
Inventors
- 👤 Johansson Rolf Gustaf
- 👤 Svensson Sven-Erik Vilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:22
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/26; B66C23/28; B66C23/32; B66F; B66F1/00; B66F1/02; B66F1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
MEANS FOR RAISING A TOWER CRANE VERTICALLY FROM FLOOR TO FLOOR OF A BUILDING OR THE LIKE AS IT IS BEING BUILT, SAID MEANS COMPRISING A LIFTING YOKE ADAPTED TO SUPPORT THE LOWEST PORTION OF THE CRANE TOWER, A PLURALITY OF RODS EXTENDING UPWARDLY FROM SAID YOKE A DISTANCE GREATER THAN THE DISTANCE FROM FLOOR TO FLOOR OF THE BUILDING A JACK MEANS MOUNTED ON EACH SAID ROD, SUPPORT MEANS ADAPTED TO BE PLACED ON THE FLOOR OF THE BUILDING NEXT ABOVE THE SAID LIFTING YOKE TO RECEIVE AND SUPPORT SAID JACKS, AND MEANS TO OPERATE ALL SAID JACKS SIMULTANEOUSLY TO LIFT SAID RODS, SAID JACKS INCLUDING JAMBING MEANS TO PREVENT RETROGRADE MOVEMENT OF SAID RODS WITH RESPECT TO SAID JACKS WHEREBY SAID JACKS MAY BE INTERMITTENTLY OPERATED TO LIFT SAID TOWER CRANE STEP BY STEP.
Claim 2
Dependent Claim
136 words
MEANS FOR RAISING A TOWER CRANE VERTICALLY FROM FLOOR TO FLOOR OF A BUILDING OR THE LIKE AS IT IS BEING BUILT, SAID MEANS COMPRISING A LIFTING YOKE ADAPTED TO SUPPORT THE LOWEST PORTION OF THE CRANE TOWER, A PLURALITY OF RODS EXTENDING UPWARDLY FROM SAID YOKE A DISTANCE GREATER THAN THE DISTANCE FROM FLOOR TO FLOOR OF THE BUILDING A JACK MEANS MOUNTED ON EACH SAID ROD, SUPPORT MEANS ADAPTED TO BE PLACED ON THE FLOOR OF THE BUILDING NEXT ABOVE THE SAID LIFTING YOKE TO RECEIVE AND SUPPORT SAID JACKS, AND MEANS TO OPERATE ALL SAID JACKS SIMULTANEOUSLY TO LIFT SAID RODS, SAID JACKS INCLUDING JAMBING MEANS TO PREVENT RETROGRADE MOVEMENT OF SAID RODS WITH RESPECT TO SAID JACKS WHEREBY SAID JACKS MAY BE INTERMITTENTLY OPERATED TO LIFT SAID TOWER CRANE STEP BY STEP.
References Cited (Backward Citations)
US168603A
Cited
FR1203098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |