US3176854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boom suspension system
Assignee: American Hoist and Derrick Co
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Filing: 1963-03-14
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Granted: 1965-04-06
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Expires: 1983-03-14
Abstract
No abstract record available.
Inventors
- 👤 Archer W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:46
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/26; B66C23/34; B66C23/62; B66C23/82; B66C23/88; B66C23/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
THE COMBINATION WITH A CRANE BASE, A BOOM MOUNTED ON SAID BASE FOR PIVOTAL MOVEMENT ABOUT A SUBSTANTIALLY HORIZONTAL AXIS, HOIST MEANS FOR RAISING SAID BOOM, UPPER AND LOWER PENDANTS, EACH HAVING OUTER AND INNER ENDS, SAID OUTER ENDS BEING PIVOTALLY MOUNTED TO SAID BOOM IN SPACED RELATIONSHIP TO EACH OTHER ALONG THE LONGITUDINAL DIMENSION OF SAID BOOM, AN EQUALIZER ARM HAVING SPACED FIRST AND SECOND ARM ENDS, MEANS TO MOUNT SAID EQUALIZER ARM TO SAID HOIST MEANS INCLUDING A SUBSTANTIALLY HORIZONTAL PIVOT POSITIONED BETWEEN SAID SPACED ARM ENDS, AND MEANS FOR PIVOTALLY ATTACHING SAID INNER ENDS OF SAID UPPER AND LOWER PENDANTS TO SAID FIRST AND SECOND ARMS ENDS, RESPECTIVELY.
Claim 2
Dependent Claim
111 words
THE COMBINATION WITH A CRANE BASE, A BOOM MOUNTED ON SAID BASE FOR PIVOTAL MOVEMENT ABOUT A SUBSTANTIALLY HORIZONTAL AXIS, HOIST MEANS FOR RAISING SAID BOOM, UPPER AND LOWER PENDANTS, EACH HAVING OUTER AND INNER ENDS, SAID OUTER ENDS BEING PIVOTALLY MOUNTED TO SAID BOOM IN SPACED RELATIONSHIP TO EACH OTHER ALONG THE LONGITUDINAL DIMENSION OF SAID BOOM, AN EQUALIZER ARM HAVING SPACED FIRST AND SECOND ARM ENDS, MEANS TO MOUNT SAID EQUALIZER ARM TO SAID HOIST MEANS INCLUDING A SUBSTANTIALLY HORIZONTAL PIVOT POSITIONED BETWEEN SAID SPACED ARM ENDS, AND MEANS FOR PIVOTALLY ATTACHING SAID INNER ENDS OF SAID UPPER AND LOWER PENDANTS TO SAID FIRST AND SECOND ARMS ENDS, RESPECTIVELY.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |