Patent US2590924A successfully refreshed from Google Patents.
Patent US3076560A successfully refreshed from Google Patents.
US3076560A
Expired / Lapsed
US
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Retractible mast and boom stop
Assignee: Thew Shovel Co
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Filing: 1961-04-24
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Granted: 1963-02-05
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Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 Robert J Bushong
- 👤 Virgil F Kramer
- 👤 George C Noll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:46
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; B66C2700/0364; B66C2700/0371
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN COMBINATION, A FRAME, A BOOM PIVOTED TO SAID FRAME FOR VERTICAL SWINGING MOVEMENT ABOUT A HORIZONTAL AXIS, A MAST PIVOTED TO SAID BOOM, A TRUNNION MOUNTED ON SAID MAST A FIXED DISTANCE FROM SUCH MAST-BOOM PIVOT PENDANTS INTERCONNECTING THE PEAK OF SAID MAST AND THE PEAK OF SAID BOOM, AND HOISTING MEANS CONNECTED TO THE PEAK OF SAID MAST FOR VERTICALLY SWINGING SAID MAST AND THUS SAID BOOM, A STOP MEMBER PIVOTED TO SAID BOOM AND SLIDE GUIDED BY SAID TRUNNION, SAID STOP MEMBER ENGAGING SAID FRAME ON MAXIMUM ELEVATION OF SAID BOOM.
Claim 2
Dependent Claim
94 words
IN COMBINATION, A FRAME, A BOOM PIVOTED TO SAID FRAME FOR VERTICAL SWINGING MOVEMENT ABOUT A HORIZONTAL AXIS, A MAST PIVOTED TO SAID BOOM, A TRUNNION MOUNTED ON SAID MAST A FIXED DISTANCE FROM SUCH MAST-BOOM PIVOT PENDANTS INTERCONNECTING THE PEAK OF SAID MAST AND THE PEAK OF SAID BOOM, AND HOISTING MEANS CONNECTED TO THE PEAK OF SAID MAST FOR VERTICALLY SWINGING SAID MAST AND THUS SAID BOOM, A STOP MEMBER PIVOTED TO SAID BOOM AND SLIDE GUIDED BY SAID TRUNNION, SAID STOP MEMBER ENGAGING SAID FRAME ON MAXIMUM ELEVATION OF SAID BOOM.
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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |