Patent US3139988A successfully refreshed from Google Patents.
US3139988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator for cranes and the like
Assignee: Koehring Co
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Filing: 1962-07-24
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Granted: 1964-07-07
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Expires: 1982-07-24
Abstract
No abstract record available.
Inventors
- 👤 Erwin C Brekelbaum
- 👤 George C Noll
- 👤 George B Klos
- 👤 John D Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:19
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/88; B66C23/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A CRANE COMPRISING AN OPERATOR''S CAB, AN OPERATING BOOM ADAPTED TO BE OPERATED THEREFROM, AN INDICATOR VISUALLY ACCESSIBLE TO SAID OPERATOR''S CAB, MEANS RESPONSIVE TO CHANGES IN POSITION OF SAID OPERATING BOOM TO MOVE SAID INDICATOR VISUALLY TO CONVEY TO SAID OPERATOR''S CAB THE POSITION OF SAID BOOM, A TOWER, MEANS MOUNTING SAID OPERATING BOOM AT THE PEAK OF SAID TOWER, SAID OPERATOR''S CAB AND ACCORDINGLY SAID INDICATOR BEING AT THE BASE OF SAID TOWER AND THUS SUBSTANTIALLY REMOVED FROM SAID OPERATING BOOM, AND LINKAGE MEANS INTERCONNECTING SAID INDICATOR AND SAID OPERATING BOOM OPERATIVE TO MOVE SAID INDICATOR IN RESPONSE TO CHANGES IN THE ANGULAR POSITION OF SAID OPERATING BOOM.
Claim 2
Dependent Claim
110 words
A CRANE COMPRISING AN OPERATOR''S CAB, AN OPERATING BOOM ADAPTED TO BE OPERATED THEREFROM, AN INDICATOR VISUALLY ACCESSIBLE TO SAID OPERATOR''S CAB, MEANS RESPONSIVE TO CHANGES IN POSITION OF SAID OPERATING BOOM TO MOVE SAID INDICATOR VISUALLY TO CONVEY TO SAID OPERATOR''S CAB THE POSITION OF SAID BOOM, A TOWER, MEANS MOUNTING SAID OPERATING BOOM AT THE PEAK OF SAID TOWER, SAID OPERATOR''S CAB AND ACCORDINGLY SAID INDICATOR BEING AT THE BASE OF SAID TOWER AND THUS SUBSTANTIALLY REMOVED FROM SAID OPERATING BOOM, AND LINKAGE MEANS INTERCONNECTING SAID INDICATOR AND SAID OPERATING BOOM OPERATIVE TO MOVE SAID INDICATOR IN RESPONSE TO CHANGES IN THE ANGULAR POSITION OF SAID OPERATING 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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |