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US3276749A
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Multisheave blocks
Assignee: Dresser Industries Inc
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Filing: 1964-10-07
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Granted: 1966-10-04
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Expires: 1984-10-07
Abstract
No abstract record available.
Inventors
- 👤 William M Marks
- 👤 James E Ashworth
- 👤 Wayne L Brackin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; B; B66; B66D; B66D3/00; B66D3/04; B66D3/06; B66D2700/00; B66D2700/02; B66D2700/026; B66D2700/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A TRAVELING BLOCK PROVIDED WITH A PLURALITY OF SHEAVES DIVIDED INTO TWO GROUPS WITH EACH GROUP OF SHEAVES MOUNTED FOR ROTATION AROUND TWO DIFFERENT HORIZONTAL AXES, THE BLOCK HAVING A FIRST CENTERLINE OF SUPPORT WHEN ALL OF THE SHEAVES ARE IN SERVICE AND A SECOND CENTERLINE OF SUPPORT WHEN ONLY THE SHEAVES IN ONE GROUP ARE IN SERVICE; MEANS FOR CONNECTING THE BLOCK TO A LOAD; AND MEANS FOR MOVING THE GROUP OF SHEAVES IN SERVICE LATERALLY RELATIVE TO THE CONNECTING MEANS TO MAINTAIN THE SECOND CENTERLINE OF SUPPORT IN ALIGNMENT WITH THE LOAD.
Claim 2
Dependent Claim
94 words
A TRAVELING BLOCK PROVIDED WITH A PLURALITY OF SHEAVES DIVIDED INTO TWO GROUPS WITH EACH GROUP OF SHEAVES MOUNTED FOR ROTATION AROUND TWO DIFFERENT HORIZONTAL AXES, THE BLOCK HAVING A FIRST CENTERLINE OF SUPPORT WHEN ALL OF THE SHEAVES ARE IN SERVICE AND A SECOND CENTERLINE OF SUPPORT WHEN ONLY THE SHEAVES IN ONE GROUP ARE IN SERVICE; MEANS FOR CONNECTING THE BLOCK TO A LOAD; AND MEANS FOR MOVING THE GROUP OF SHEAVES IN SERVICE LATERALLY RELATIVE TO THE CONNECTING MEANS TO MAINTAIN THE SECOND CENTERLINE OF SUPPORT IN ALIGNMENT WITH THE LOAD.
References Cited (Backward Citations)
US3179376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |