US3352441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane boom
Assignee: Individual
•
Filing: 1965-10-18
•
Granted: 1967-11-14
•
Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 Alden Lars Anders Gustaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:40
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/044; B66F11/046; B66C; B66C23/00; B66C23/06; B66C23/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A CRANE BOOM COMPRISING A FULCRUM, A GUIDE LOCATED ADJACENT SAID FULCRUM OF SAID BOOM, A FREE END PORTION EXTENDING AWAY FROM THE FULCRUM OF SAID BOOM AND EXTENSIBLE IN RELATION TO THE REMAINING PORTION OF SAID BOOM, SAID FREE END PORTION BEING ADAPTED AT THE PIVOTING OF SAID BOOM TO MOVE IN PATH UNIFORM WITH ANOTHER PATH FORMED BY SAID GUIDE, TWO DOUBLE-ACTING HYDRAULIC OPERATING CYLINDERS HAVING WORKING CHAMBERS COMMUNICATING IN PAIRS THROUGH DIRECT CONDUITS, ONE OPERATING CYLINDER BEING INTERPOSED BETWEEN SAID BOOM AND SAID GUIDE WHILE THE OTHER OPERATING CYLINDER IS INTERPOSED BETWEEN SAID BOOM AND SAID EXTENSIBLE FREE END PORTION, THE EFFECTIVE CROSS SECTIONAL AREA OF THE OPERATING CYLINDER COACTING WITH SAID
Claim 2
Dependent Claim
115 words
A CRANE BOOM COMPRISING A FULCRUM, A GUIDE LOCATED ADJACENT SAID FULCRUM OF SAID BOOM, A FREE END PORTION EXTENDING AWAY FROM THE FULCRUM OF SAID BOOM AND EXTENSIBLE IN RELATION TO THE REMAINING PORTION OF SAID BOOM, SAID FREE END PORTION BEING ADAPTED AT THE PIVOTING OF SAID BOOM TO MOVE IN PATH UNIFORM WITH ANOTHER PATH FORMED BY SAID GUIDE, TWO DOUBLE-ACTING HYDRAULIC OPERATING CYLINDERS HAVING WORKING CHAMBERS COMMUNICATING IN PAIRS THROUGH DIRECT CONDUITS, ONE OPERATING CYLINDER BEING INTERPOSED BETWEEN SAID BOOM AND SAID GUIDE WHILE THE OTHER OPERATING CYLINDER IS INTERPOSED BETWEEN SAID BOOM AND SAID EXTENSIBLE FREE END PORTION, THE EFFECTIVE CROSS SECTIONAL AREA OF THE OPERATING CYLINDER COACTING WITH SAID
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |