Patent US3887975A successfully refreshed from Google Patents.
US3887975A
Expired / Lapsed
US
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Slotting cutter and cutting insert therefor
Assignee: Kennametal Inc
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Filing: 1974-05-13
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Granted: 1975-06-10
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Expires: 1994-05-13
Abstract
Abstract A slotting cutter in which a disc is provided with insert pockets on opposite sides thereof with replaceable cutting inserts of hard wear resistant material mounted in the pockets. The inserts are clamped in the pockets by an eccentric which forces the inserts against the rearward and bottom walls of the pockets thereby providing extremely firm support for the inserts. When the disc is viewed in the circumferential direction, the inserts are in overlapping relation and thereby cooperate to cut slots in a work member.
Inventors
- 👤 Edward L Sorice
- 👤 Ernest J Friedline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:23
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2265; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1934; Y10T407/1942; Y10T407/1952; Y10T407/1956; Y10T407/1962; Y10T407/22; Y10T407/2272; Y10T407/228; Y10T407/23
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
217 words
In a slotting cutter; a disc like body having parallel side walls and rotatable in a predetermined direction on a central axis perpendicular to the plane of the body, a plurality of pockets formed into each side wall of the body in circumferentially distributed relation with the pockets in one side of the body staggered relative to the pockets in the other side of the body when the body is viewed in the axial direction, each pocket having circumferentially spaced front and rear walls and an axially bottom wall and a radially inner wall and open on the other two sides, said axially bottom wall converging with the respective side wall of the rotatable disc body in the direction of rotation of said disc body and also inclining outwardly toward said disc wall from the radially inner end of said axially bottom wall toward the outer end thereof, a cutting insert in each pocket having parallel front and back walls and parallel side walls perpendicular to said front and back walls, each insert having an end portion protruding radially from said body and presenting a cutting edge, and clamping means for clamping each insert in the respective pocket while simultaneously urging the insert toward the said rear wall and the said radially inner wall of the pocket.
Claim 2
Dependent Claim
217 words
In a slotting cutter; a disc like body having parallel side walls and rotatable in a predetermined direction on a central axis perpendicular to the plane of the body, a plurality of pockets formed into each side wall of the body in circumferentially distributed relation with the pockets in one side of the body staggered relative to the pockets in the other side of the body when the body is viewed in the axial direction, each pocket having circumferentially spaced front and rear walls and an axially bottom wall and a radially inner wall and open on the other two sides, said axially bottom wall converging with the respective side wall of the rotatable disc body in the direction of rotation of said disc body and also inclining outwardly toward said disc wall from the radially inner end of said axially bottom wall toward the outer end thereof, a cutting insert in each pocket having parallel front and back walls and parallel side walls perpendicular to said front and back walls, each insert having an end portion protruding radially from said body and presenting a cutting edge, and clamping means for clamping each insert in the respective pocket while simultaneously urging the insert toward the said rear wall and the said radially inner wall of the pocket.
Claim 3
Dependent Claim
46 words
A slotting cutter according to claim 1 in which said clamping means comprises a pin rotatable in said body near the forward wall of each pocket and having an eccentric head thereon engageable with the forwardly facing side of the insert when the pin is rotated.
Claim 4
Dependent Claim
60 words
A slotting cutter according to claim 2 in which each insert has a lateral notch formed in the forwardly facing side for engagement by the head of the respective pin whereby the head of the pin generates a force on the insert pressing the insert toward the said rear wall and the said radially inner wall of the respective pocket.
Claim 5
Dependent Claim
34 words
A slotting cutter according to claim 1 in which each insert is invertable about an axis substantially parallel to the axis of rotation and has a said cutting edge formed on each end thereof.
Claim 6
Dependent Claim
47 words
A slotting cutter according to claim 2 in which said clamping means comprises a screw threaded into said body near the forward wall of each said pocket and having an eccentric head thereon engageable with the forwardly facing side of the insert when the pin is rotated.
Claim 7
Dependent Claim
60 words
A slotting cutter according to claim 5 in which each said head tapers inwardly in at least the region thereof which engages the respective said insert, said insert having an inclined recess for engagement by said head whereby said head urges said insert toward said rear wall, said bottom wall and said radially inner wall when said pin is rotated.
Claim 8
Dependent Claim
28 words
A slotting cutter according to claim 1 in which the pockets on one side of the wheel axially overlap the pockets in the other side of the wheel.
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 |