Patent US3354599A successfully refreshed from Google Patents.
US3354599A
Expired / Lapsed
US
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Method of erecting a mast
Assignee: D Wickman and Co Ltd
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Filing: 1965-08-23
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Granted: 1967-11-28
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Expires: 1985-08-23
Abstract
No abstract record available.
Inventors
- 👤 Martin Derek John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:03
CPC Classifications
B; B66; B66B; B66B9/00; B66B9/16; B66B9/187; B66C; B66C23/00; B66C23/18; B66C23/26; B66C23/28; B66C23/283; E; E04; E04H; E04H12/00; E04H12/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A METHOD FOR ERECTING A HOIST ON A MAST, COMPRISING THE STEPS OF PROVIDING A HOIST COMPRISING A PLATFORM, A ROTARY IDLER MOUNTED ON SAID PLATFORM, A CAGE, A COUNTERWEIGHT AND A FLEXIBLE TENSILE-FORCE-TRANSMITTING MEMBER CONNECTING THE CAGE TO THE COUNTERWEIGHT AND PASSING OVER THE IDLER TO SUSPEND THE CAGE AND COUNTERWEIGHT THEREFROM, SECURING THE PLATFORM TO THE MAST, CONNECTING OPPOSITE ENDS OF A CONTRACTIBLE AND EXTENDIBLE JACKING DEVICE RESPECTIVELY TO THE PLATFORM AND THE CAGE, SECURING THE CAGE TO THE MAST BELOW THE PLATFORM, RELEASING THE PLATFORM FROM THE MAST, EXTENDING THE SAID DEVICE TO RAISE THE PLATFORM UP THE MAST, SECURING THE PLATFORM TO THE MAST, RELEASING THE CAGE FROM THE MAST, CONTRACTING THE SAID DEVICE TO RAISE THE CAGE UP THE MAST, REPEATING THE SIX LAST-MENTIONED STEPS UNTIL THE PLATFORM AND CAGES THE DESIRED POSITION ON THE MAST, AND INCREASING THE LENGTH OF THE SAID MEMBER BY AN AMOUNT WHICH CORRESPONDS TO THE DISPLACEMENT OF THE PLATFORM UP THE MAST.
Claim 2
Independent Claim
163 words
A METHOD FOR ERECTING A HOIST ON A MAST, COMPRISING THE STEPS OF PROVIDING A HOIST COMPRISING A PLATFORM, A ROTARY IDLER MOUNTED ON SAID PLATFORM, A CAGE, A COUNTERWEIGHT AND A FLEXIBLE TENSILE-FORCE-TRANSMITTING MEMBER CONNECTING THE CAGE TO THE COUNTERWEIGHT AND PASSING OVER THE IDLER TO SUSPEND THE CAGE AND COUNTERWEIGHT THEREFROM, SECURING THE PLATFORM TO THE MAST, CONNECTING OPPOSITE ENDS OF A CONTRACTIBLE AND EXTENDIBLE JACKING DEVICE RESPECTIVELY TO THE PLATFORM AND THE CAGE, SECURING THE CAGE TO THE MAST BELOW THE PLATFORM, RELEASING THE PLATFORM FROM THE MAST, EXTENDING THE SAID DEVICE TO RAISE THE PLATFORM UP THE MAST, SECURING THE PLATFORM TO THE MAST, RELEASING THE CAGE FROM THE MAST, CONTRACTING THE SAID DEVICE TO RAISE THE CAGE UP THE MAST, REPEATING THE SIX LAST-MENTIONED STEPS UNTIL THE PLATFORM AND CAGES THE DESIRED POSITION ON THE MAST, AND INCREASING THE LENGTH OF THE SAID MEMBER BY AN AMOUNT WHICH CORRESPONDS TO THE DISPLACEMENT OF THE PLATFORM UP THE MAST.
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |