US3350818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife sharpening mechanism
Assignee: Eastman Machine Co
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Filing: 1964-07-06
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Granted: 1967-11-07
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:09
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/002; B24B3/00; B24B3/36; B24B3/361
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A KNIFE SHARPENING MECHANISM FOR CUTTING MACHINES HAVING A KNIFE WITH A CUTTING EDGE GUIDED FOR RECIPROCAL MOTION, (A) A GRINDER CARRIAGE MOVABLE TO AND FRO ALONG THE KNIFE EDGE AND HAVING SHARPENING ABRASIVE BELTS MOUNTED THEREON FOR MOVEMENT INTO AND OUT OF ENGAGEMENT WITH THE CUTTING EDGE, (B) ARMS PIVOTED ON SAID CARRIAGE AT OPPOSITE SIDES OF SAID KNIFE AND HAVING THEIR FREE ENDS SPRING-URGED TOWARD SAID KNIFE, MEANS ON SAID ARMS FOR PRESSING SAID ABRASIVE BELTS AGAINST THE CUTTING EDGE, (C) A BRACKET ON EACH PIVOTED ARM AND HAVING AN EXTENSION PROJECTING UPWARDLY INTO CLOSE PROXIMITY TO THE KNIFE, AND (D) A PART ON SAID EXTENSION ADJUSTABLE TOWARD AND FROM SAID KNIFE TO COMPENSATE FOR VARIATIONS IN THICKNESS OF SAID BELT.
Claim 2
Dependent Claim
124 words
IN A KNIFE SHARPENING MECHANISM FOR CUTTING MACHINES HAVING A KNIFE WITH A CUTTING EDGE GUIDED FOR RECIPROCAL MOTION, (A) A GRINDER CARRIAGE MOVABLE TO AND FRO ALONG THE KNIFE EDGE AND HAVING SHARPENING ABRASIVE BELTS MOUNTED THEREON FOR MOVEMENT INTO AND OUT OF ENGAGEMENT WITH THE CUTTING EDGE, (B) ARMS PIVOTED ON SAID CARRIAGE AT OPPOSITE SIDES OF SAID KNIFE AND HAVING THEIR FREE ENDS SPRING-URGED TOWARD SAID KNIFE, MEANS ON SAID ARMS FOR PRESSING SAID ABRASIVE BELTS AGAINST THE CUTTING EDGE, (C) A BRACKET ON EACH PIVOTED ARM AND HAVING AN EXTENSION PROJECTING UPWARDLY INTO CLOSE PROXIMITY TO THE KNIFE, AND (D) A PART ON SAID EXTENSION ADJUSTABLE TOWARD AND FROM SAID KNIFE TO COMPENSATE FOR VARIATIONS IN THICKNESS OF SAID BELT.
References Cited (Backward Citations)
US2281023A
Cited
US2790235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |