Patent US3887974A successfully refreshed from Google Patents.
US3887974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert and holder therefor
Assignee: Kennametal Inc
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Filing: 1974-08-01
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Granted: 1975-06-10
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Expires: 1994-08-01
Abstract
Abstract The present invention relates to a cutting insert and a holder therefor in which the insert is transferrable from a righthand holder to a lefthand holder which is a mirror image of the righthand holder by reversing the insert end for end. The insert, thus, has a cutting insert on each end with a respective cutting edge being usable in each of the said righthand and lefthand holders. The insert is relatively elongated with the cutting edges in the ends and the holder has an elongated pocket open on the top and on one side and toward one end in the bottom wall of the insert inclines downwardly toward the closed side of the pocket in the holder and is held in place in the pocket by a clamp member having end portions engaging the holder and a groove in the insert and held on the holder by a central clamp screw.
Inventors
- 👤 Edward L Sorice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:30
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/16; B23B27/1644; B23B27/1625; B23B2200/00; B23B2200/08; B23B2200/086; B23B2200/088; B23B2200/16; B23B2200/165; Y; Y10; Y10T; Y10T407/00; Y10T407/23
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
A cutting insert comprising: a body of hard wear resistant material having top and bottom and siDe and end walls, said side walls being parallel and longer than said end walls and said body being symmetrical about an axis perpendicular to said side walls when viewed in plan, one of the longer side walls being shorter than the other thereof whereby said end walls converge toward one side wall of said body, each end wall of the body forming a cutting edge at the junction thereof with the said top wall of the body, said top wall having a flat island area upstanding thereon which at the ends is spaced inwardly from said cutting edges, a land region in the plane of said top wall extending inwardly from each cutting edge, and a fillet at the inner edge of each land region leading upwardly to the plane of said island area.
Claim 2
Dependent Claim
151 words
A cutting insert comprising: a body of hard wear resistant material having top and bottom and siDe and end walls, said side walls being parallel and longer than said end walls and said body being symmetrical about an axis perpendicular to said side walls when viewed in plan, one of the longer side walls being shorter than the other thereof whereby said end walls converge toward one side wall of said body, each end wall of the body forming a cutting edge at the junction thereof with the said top wall of the body, said top wall having a flat island area upstanding thereon which at the ends is spaced inwardly from said cutting edges, a land region in the plane of said top wall extending inwardly from each cutting edge, and a fillet at the inner edge of each land region leading upwardly to the plane of said island area.
Claim 3
Dependent Claim
26 words
A cutting insert according to claim 1 in which said bottom wall is inclined upwardly from one side of said body toward the other side thereof.
Claim 4
Dependent Claim
33 words
A cutting insert according to claim 1 in which said insert has a groove extending transversely thereacross from one said side wall to the other in about the middle of the length thereof.
Claim 5
Dependent Claim
20 words
A cutting insert according to claim 1 in which the corners of said body when viewed in plan are rounded.
Claim 6
Dependent Claim
43 words
A cutting insert according to claim 4 in which each cutting edge comprises a longer linear portion adjacent the longer side of the body and shorter linear portion adjacent the shorter side of the body, said portions forming an obtuse included angle therebetween.
Claim 7
Dependent Claim
78 words
A cutting insert according to claim 1 in which said island area at the sides terminates inwardly from the side walls of the body, said land region extending completely around said body in the plane of said top wall, and a groove extending laterally across said top wall of said body in the middle of the length of the insert from one side wall of the insert to the other and at the ends interrupting said land region.
Claim 8
Dependent Claim
20 words
A cutting insert according to claim 1 in which said body tapers outwardly in the upward direction on all sides.
Claim 9
Dependent Claim
64 words
A cutting insert according to claim 6 in which said body is symmetrical about a plane perpendicular to the plane of said top wall and passing through the center of said groove, said body tapering outwardly toward the top on all sides, the bottom wall of said insert inclining upwardly from the longer side wall of said body toward the shorter side wall thereof.
Claim 10
Dependent Claim
19 words
A cutting insert according to claim 8 in which said groove is an upwardly opening wide angle ''''V'''' groove.
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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |