Patent US3552070A successfully refreshed from Google Patents.
US3552070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque limiter
Assignee: OZTEC IND Inc
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Filing: 1968-12-16
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Granted: 1971-01-05
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Expires: 1988-12-16
Abstract
Abstract IN A FLOOR GRINDER, A MOTOR DRIVES A HOLLOW VERTICAL SHAFT. A LOWER SHAFT TELESCOPES INTO THE HOLLOW SHAFT, IS SPRING LOADED DOWNWARD, AND HAS A GRINDING PLATE FIXED TO ITS LOWER PROJECTING END. THE HOLLOW SHAFT HAS AT LEAST ONE SPIRAL DRUM CAM CUTOUT FORMED IN IT AND THE LOWER SHAFT HAS A CAM FOLLOWER EXTENDING INTO THE DRUM CAM CUTOUT SO THAT EXCESSIVE TORQUE IMPOSED BY FRICTIONAL RESISTANCE ENCOUNTERED BY THE GRINDING PLATE CAUSES THE DRUM CAM CUTOUT TO RAISE THE CAM FOLLOWER AND THE LOWER SHAFT AND LIFT THE GRINDING PLATE THEREBY LIMITING TORQUE.
Inventors
- 👤 Peter F Reiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:37
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/18; B24B7/186; A; A47; A47L; A47L11/00; A47L11/02; A47L11/10; A47L11/14; A47L11/16; A47L11/40; A47L11/4052; A47L11/4058; A47L11/4063; A47L11/4069
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |