Patent US3349485A successfully refreshed from Google Patents.
US3349485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary knife with sharpener
Assignee: Bettcher Industries Inc
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Filing: 1966-01-10
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Granted: 1967-10-31
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Expires: 1986-01-10
Abstract
No abstract record available.
Inventors
- 👤 Louis A Bettcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:36
CPC Classifications
B; B26; B26B; B26B25/00; B26B25/002; B24; B24B; B24B3/00; B24B3/36; B24B3/368
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
158 words
A HAND MANIPULATED KNIFE COMPRISING AN ANNULAR BLADE SUPPORTING STRUCTURE INCLUDING A HANDLE; AN ANNULAR BLADE MOVABLY SUPPORTED BY SAID STRUCTURE FOR ROTATION ABOUT ITS CENTRAL AXIS, SAID BLADE HAVING A CIRCULAR CUTTING EDGE AND THE BLADE AND SUPPORTING STRUCTURE PROVIDING A CENTRAL AREA THROUGH WHICH PORTIONS OF WORK CUT BY THE BLADE CAN PASS; MEANS TO ROTATE THE BLADE RELATIVE TO THE STRUCTURE TO CUT WORK ENGAGED BY THE BLADE; AND A BLADE SHARPENER ASSEMBLY IN SAID CENTRAL AREA CARRIED BY THE SUPPORTING STRUCTURE, SAID BLADE SHARPENER ASSEMBLY INCLUDING A MEMBER HAVING A SHARPENING SURFACE LOCATED ADJACENT THE CUTTING EDGE OF THE BLADE, MEANS MOUNTING THE MEMBER FOR RECIPROCABLE MOVEMENT ALONG A PATH INCLINED TO THE BLADE INTO AND OUT OF CONTACT WITH A SURFACE OF THE BLADE AT THE CUTTING EDGE, AND A HAND GRASP ADJACENT TO THE END OF SAID MEMBER REMOTE FROM THE SHARPENING SURFACE FOR ENGAGEMENT BY AN OPERATOR TO RECIPROCATE SAID MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |