US3179259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snubbing system for cranes
Assignee: Dravo Corp
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Filing: 1963-08-12
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Granted: 1965-04-20
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Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 William B Mclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:48
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/04; B66C13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A SNUBBING SYSTEM FOR CRANES COMPRISING A FRAME, A HOIST MECHANISM INCLUDING CABLES FOR SUSPENDING A LOAD, LOAD SNUBBING LINES ATTACHED TO THE LOAD AT SPACED POINTS FOR STEADYING THE LOAD AGAINST PENDULOUS MOTIONS, REELS MOUNTED ON THE FRAME, THE SNUBBING LINES BEING WOUND ABOUT THE REELS, THE REELS INCLUDING MEANS FOR TENSIONING THE LINES DURING PAY-OUT, TAKE-UP AND REST ACTIONS OF THE LINES, AND DAMPENING MEANS CONNECTED TO THE REELS FOR BRAKING THE ROTATION OF THE REELS SELECTIVELY WHEREBY TRANSVERSE, LONGITUDINAL AND SWINGING MOTIONS OF THE LOAD ARE ELIMINATED.
Claim 2
Dependent Claim
90 words
A SNUBBING SYSTEM FOR CRANES COMPRISING A FRAME, A HOIST MECHANISM INCLUDING CABLES FOR SUSPENDING A LOAD, LOAD SNUBBING LINES ATTACHED TO THE LOAD AT SPACED POINTS FOR STEADYING THE LOAD AGAINST PENDULOUS MOTIONS, REELS MOUNTED ON THE FRAME, THE SNUBBING LINES BEING WOUND ABOUT THE REELS, THE REELS INCLUDING MEANS FOR TENSIONING THE LINES DURING PAY-OUT, TAKE-UP AND REST ACTIONS OF THE LINES, AND DAMPENING MEANS CONNECTED TO THE REELS FOR BRAKING THE ROTATION OF THE REELS SELECTIVELY WHEREBY TRANSVERSE, LONGITUDINAL AND SWINGING MOTIONS OF THE LOAD ARE ELIMINATED.
References Cited (Backward Citations)
No citation records indexed.
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 |