Patent US3284149A successfully refreshed from Google Patents.
Patent US3097749A successfully refreshed from Google Patents.
US3097749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boom stabilizing and safety control apparatus
Assignee: Individual
•
Filing: 1962-01-25
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Granted: 1963-07-16
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Expires: 1982-01-25
Abstract
No abstract record available.
Inventors
- 👤 Oscar W Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:08
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/14; B; B66; B66C; B66C23/00; B66C23/62; B66C23/82; B66C23/88; B66C23/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN A HOISTING APPARATUS HAVING A PIVOTALLY MOUNTED BOOM AND A WORKING LINE CONNECTED TO A WORKING DRUM FOR NORMALLY RAISING AND LOWERING THE BOOM ABOUT ITS PIVOT, THE IMPROVEMENT RESIDING IN, A SAFETY APPARATUS HAVING MEANS THEREWITH FOR CONTROLLING THE RATE OF LOWERING OF THE BOOM IN THE EVENT THE WORKING LINE BREAKS OR OTHER HOIST FAILURE OCCURS.
Claim 2
Dependent Claim
59 words
IN A HOISTING APPARATUS HAVING A PIVOTALLY MOUNTED BOOM AND A WORKING LINE CONNECTED TO A WORKING DRUM FOR NORMALLY RAISING AND LOWERING THE BOOM ABOUT ITS PIVOT, THE IMPROVEMENT RESIDING IN, A SAFETY APPARATUS HAVING MEANS THEREWITH FOR CONTROLLING THE RATE OF LOWERING OF THE BOOM IN THE EVENT THE WORKING LINE BREAKS OR OTHER HOIST FAILURE OCCURS.
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) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |