US3244404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawworks assembly
Assignee: Individual
•
Filing: 1962-10-22
•
Granted: 1966-04-05
•
Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Emil A Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:42
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/26; B66D5/00; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0166; B66D2700/0175; B66D2700/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A DRAWWORKS ASSEMBLY COMPRISING A PAIR OF DRUMS OF DIFFERENT DIAMETER, MOUNTED FOR INDEPENDENT RELATION ON A COMMON AXIS, A BRAKE ON EACH DRUM, INCLUDING A BRAKE-ACTUATING LINKAGE, MEANS TO APPLY A SINGLE BRAKING FORCE TO THE ASSEMBLY, AND A ROCKER ARM MEDIALLY, PIVOTALLY CONNECTED TO SAID MEANS, AND PIVOTALLY CONNECTED, AT SPACED POINTS, TO THE RESPECTIVE SAID LINKAGES, WHEREBY TO DISTRIBUTE SAID FORCE.
References Cited (Backward Citations)
US247680A
Cited
US1525666A
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US1746060A
Cited
US2084449A
Cited
US2191769A
Cited
US2337772A
Cited
US2272049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |