US3399442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert
Assignee: Kennametal Inc
•
Filing: 1966-09-08
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Granted: 1968-09-03
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Expires: 1986-09-08
Abstract
No abstract record available.
Inventors
- 👤 Dennis G Jones
- 👤 George E Greubel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:33
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
A POSITIVE RAKE THROW AWAY CUTTING INSERT ADAPTED FOR BEING MOUNTED IN A NEGATIVE RAKE HOLDER; SAID INSERT COMPRISING A BODY OF HARD MATERIAL HAVING OPPOSED TOP AND BOTTOM FACES IN PARALLEL PLANES AND A PERIPHERAL SURFACE PERPENDICULAR TO SAID PLANES AT LEAST ONE OF SAID FACES HAVING RECESS MEANS FORMED THEREIN ALONG THE ENTIRE OUTER EDGE THEREOF EXTENDING FROM THE JUNCTION OF SAID PERIPHERAL SURFACE AND SAID ONE FACE INWARDLY TOWARD THE CENTER OF SAID ONE FACE, SAID RECESS COMPRISING OF AN OUTER REGION ADJACENT SAID PERIPHERAL SURFACE FORMING AN ANGLE LESS THAN 90* WITH SAID PERIPHERAL SURFACE, SAID RECESS MEANS ALSO COMPRISING AN INNER REGION IN THE FORM OF AN ABRUPT RISING LEADING FROM THE LOWERMOST PART OF SAID OUTER REGION UPWARDLY TO THE PLANE OF SAID ONE FACE, THE LINE OF INTERSECTION OF SAID INNER REGION WITH THE PLANE OF SAID ONE FACE DEFINING AN ISLAND AREA IN THE CENTER OF SAID ONE FACE, SAID OUTER REGION BEING CONCAVE TOWARD SAID ONE FACE IN CROSS SECTION WHEREBY WHEN SAID INSERT IS MOUNTED IN A NEGATIVE RAKE HOLDER AND PRESENTED TO A WORKPIECE TO BE CUT THEREBY AND TILTED DOWNWARDLY RELATIVE THERETO IN TWO ANGULARLY RELATED DIRECTIONS, THE INSERT WILL PRESENT A POSITIVE RAKE TO THE WORKPIECE IN EACH OF SAID DIRECTIONS.
Claim 2
Dependent Claim
214 words
A POSITIVE RAKE THROW AWAY CUTTING INSERT ADAPTED FOR BEING MOUNTED IN A NEGATIVE RAKE HOLDER; SAID INSERT COMPRISING A BODY OF HARD MATERIAL HAVING OPPOSED TOP AND BOTTOM FACES IN PARALLEL PLANES AND A PERIPHERAL SURFACE PERPENDICULAR TO SAID PLANES AT LEAST ONE OF SAID FACES HAVING RECESS MEANS FORMED THEREIN ALONG THE ENTIRE OUTER EDGE THEREOF EXTENDING FROM THE JUNCTION OF SAID PERIPHERAL SURFACE AND SAID ONE FACE INWARDLY TOWARD THE CENTER OF SAID ONE FACE, SAID RECESS COMPRISING OF AN OUTER REGION ADJACENT SAID PERIPHERAL SURFACE FORMING AN ANGLE LESS THAN 90* WITH SAID PERIPHERAL SURFACE, SAID RECESS MEANS ALSO COMPRISING AN INNER REGION IN THE FORM OF AN ABRUPT RISING LEADING FROM THE LOWERMOST PART OF SAID OUTER REGION UPWARDLY TO THE PLANE OF SAID ONE FACE, THE LINE OF INTERSECTION OF SAID INNER REGION WITH THE PLANE OF SAID ONE FACE DEFINING AN ISLAND AREA IN THE CENTER OF SAID ONE FACE, SAID OUTER REGION BEING CONCAVE TOWARD SAID ONE FACE IN CROSS SECTION WHEREBY WHEN SAID INSERT IS MOUNTED IN A NEGATIVE RAKE HOLDER AND PRESENTED TO A WORKPIECE TO BE CUT THEREBY AND TILTED DOWNWARDLY RELATIVE THERETO IN TWO ANGULARLY RELATED DIRECTIONS, THE INSERT WILL PRESENT A POSITIVE RAKE TO THE WORKPIECE IN EACH OF SAID DIRECTIONS.
References Cited (Backward Citations)
US2870523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |