Patent US3566386A successfully refreshed from Google Patents.
US3566386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane angle indicating system
Assignee: Eaton Corp
•
Filing: 1968-02-06
•
Granted: 1971-02-23
•
Expires: 1988-02-06
Abstract
Abstract A MONITORING AND ALRAM SYSTEM FOR A TOWER CRANE WHICH WARNS THE OPERATOR OF THE CRANE IF PREDETERMINED ANGULAR LIMITS ARE EXCEEDED. TOWER CRANES MUST BE OPERATED WITHIN CERTAIN LIMITS AS DETERMINED BY THE POSITION OF THE CRANE BOOM AND IF SUCH LIMITS ARE EXCEEDED, A DANGEROUS CONDITION EXISTS. THE PRESENT INVENTION WARNS IF THE CRANE ANGLE REACHES A DANGEROUS CONDITION.
Inventors
- 👤 Martin W Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:11
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/88; B66C23/90; B66C23/905
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |