US3247974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grab stabilizer for cranes
Assignee: Harnischfeger Corp
•
Filing: 1964-05-11
•
Granted: 1966-04-26
•
Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Dechantsreiter Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:03
CPC Classifications
B; B66; B66C; B66C19/00; B66C19/007; B66C13/00; B66C13/04; B66C13/06; B66C19/02; B66C2700/00; B66C2700/01; B66C2700/012; B66C2700/017
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A MOBILE CRANE COMPRISING, AN ELEVATED FRAME A TROLLEY MOVABLE ALONG SAID FRAME, A TURRET ROTATABLY MOUNTED ABOUT A VERTICAL AXIS ON SAID TROLLEY, A VERTICAL MAST RIGIDLY FIXED AT ITS UPPER END TO SAID TURRET AND EXTENDING DOWNWARDLY THEREFROM, SAID MAST BEING OF RECTANGULAR CROSS SECTION AND HAVING A PLURALITY OF TELESCOPING SECTIONS, GRAPPLE MEANS AT THE LOWER END OF SAID MAST FOR ENGAING A LOAD TO BE ELEVATED BY CONTRACTION OF SAID MAST, TWO PIVOT AXES ARRANGED AT RIGHT ANGLES TO ONE ANOTHER AT THE LOWER END OF THE MAST FOR CONNECTING THE GRAPPLE MEANS THERETO, AND A PAIR OF LOAD ELEVATING MECHANISMS CARRIED BY SAID TURRET AND CONNECTED TO SAID GRAPPLE MENAS, SAID MECHANISMS BEING LOCATED ONE ON
Claim 2
Dependent Claim
121 words
A MOBILE CRANE COMPRISING, AN ELEVATED FRAME A TROLLEY MOVABLE ALONG SAID FRAME, A TURRET ROTATABLY MOUNTED ABOUT A VERTICAL AXIS ON SAID TROLLEY, A VERTICAL MAST RIGIDLY FIXED AT ITS UPPER END TO SAID TURRET AND EXTENDING DOWNWARDLY THEREFROM, SAID MAST BEING OF RECTANGULAR CROSS SECTION AND HAVING A PLURALITY OF TELESCOPING SECTIONS, GRAPPLE MEANS AT THE LOWER END OF SAID MAST FOR ENGAING A LOAD TO BE ELEVATED BY CONTRACTION OF SAID MAST, TWO PIVOT AXES ARRANGED AT RIGHT ANGLES TO ONE ANOTHER AT THE LOWER END OF THE MAST FOR CONNECTING THE GRAPPLE MEANS THERETO, AND A PAIR OF LOAD ELEVATING MECHANISMS CARRIED BY SAID TURRET AND CONNECTED TO SAID GRAPPLE MENAS, SAID MECHANISMS BEING LOCATED ONE ON
References Cited (Backward Citations)
DE1068628B
Cited
DE1074241B
Cited
US979173A
Cited
US2306055A
Cited
US2553378A
Cited
US2869734A
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US3051321A
Cited
FR1277706A
Cited
US3175085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |