Patent US3662444A successfully refreshed from Google Patents.
US3662444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indexable cutting insert and holder therefor
Assignee: Ingersoll Milling Machine Co
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Filing: 1970-03-09
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Granted: 1972-05-16
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Expires: 1990-03-09
Abstract
Abstract A flat and centrally apertured wafer-like insert of cutting material provides a plurality of angularly spaced available cutting tips and is located edgewise against angularly related abutments upstanding from the inner edge of a supporting surface or platform against which the insert is clamped in the final seating in a conical end of the insert aperture of the mating conical head of a screw extending through the insert aperture and threading into a hole in the platform. The insert aperture is larger than the screw shank, and the outer end of the screw hole axis is inclined relative to the axis of the insert cone at a small angle and toward the abutment corner. As a result and in the final tightening of the screw after edgewise camming of the insert against said abutments, the screw shank bends laterally to allow seating of the coned screw head in the insert recess around substantially the full peripheries of the mating cones.
Inventors
- 👤 Donald S Erkfritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:41
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2204; B23C5/2208; B23C5/2213; B23C5/24; B23C5/2462; B23C2200/00; B23C2200/36; B23C2200/367; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/1912; Y10T407/1914; Y10T407/192; Y10T407/1922; Y10T407/22; Y10T407/2272; Y10T407/2274; Y10T407/2276; Y10T407/23
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
227 words
In a cutting tool, the combination of, a body defining an insert receiving pocket including a platform and a pair of angularly related abutments upstanding therefrom, a generally flat insert resting on said platform and having a center aperture with an upwardly flaring frusto-conical recess providing a seat whose axis is normal to the plane of the insert, a plurality of cutting edges spaced around the periphery of said insert equidistant from said axis and each adapted To be located in a cutting position outwardly beyond said platform by indexing of the insert about said axis when an opposite edge of the insert is engaging said abutments, a screw having a frusto-conical head mating with the surface of said recess and a shank of smaller diameter than said aperture extending through said insert aperture and threading into an upright screw hole in the center of said platform, the outer end of the axis of said screw hole being tilted at a small angle relative to the axis of said seat and toward at least one of said abutments whereby upon tightening of said screw the insert is cammed edgewise by the screw head engaging said seat and the screw shank is bent laterally, as permitted by the clearance within said aperture, to allow the screw head to come into substantially full peripheral surface engagement with said seat.
Claim 2
Dependent Claim
227 words
In a cutting tool, the combination of, a body defining an insert receiving pocket including a platform and a pair of angularly related abutments upstanding therefrom, a generally flat insert resting on said platform and having a center aperture with an upwardly flaring frusto-conical recess providing a seat whose axis is normal to the plane of the insert, a plurality of cutting edges spaced around the periphery of said insert equidistant from said axis and each adapted To be located in a cutting position outwardly beyond said platform by indexing of the insert about said axis when an opposite edge of the insert is engaging said abutments, a screw having a frusto-conical head mating with the surface of said recess and a shank of smaller diameter than said aperture extending through said insert aperture and threading into an upright screw hole in the center of said platform, the outer end of the axis of said screw hole being tilted at a small angle relative to the axis of said seat and toward at least one of said abutments whereby upon tightening of said screw the insert is cammed edgewise by the screw head engaging said seat and the screw shank is bent laterally, as permitted by the clearance within said aperture, to allow the screw head to come into substantially full peripheral surface engagement with said seat.
Claim 3
Dependent Claim
50 words
A cutting tool as defined in claim 1 in which said body is adapted for rotation and the tilting of said screw hole axis is in a plane disposed between a plane bisecting the corner defined by said abutments and a plane perpendicular to the trailing one of said abutments.
Claim 4
Dependent Claim
202 words
In a cutting tool, the combination of, a body defining an insert receiving pocket including a platform and at least one abutment upstanding therefrom, a generally flat insert resting on said platform and having an aperture with an upwardly flaring frusto-conical recess providing a seat whose axis is normal to the plane of the insert, a plurality of cutting edges spaced around the periphery of said insert and each adapted to be located in a cutting position by indexing of the insert on said platform, a screw having a frusto-conical head mating with the surface of said recess and a shank of smaller diameter than said insert aperture extending through said aperture and threading into an upright screw hole in said platform, the upper end of the axis of said screw hole being tilted at a small angle relative to the axis of said seat and toward said abutment whereby upon tightening of said screw the insert is cammed edgewise and toward said abutment by the screw head engaging said seat and the screw shank is bent laterally, as permitted by the clearance within said aperture, to allow the screw head to come into substantially full peripheral surface engagement with said seat.
Claim 5
Dependent Claim
202 words
In a cutting tool, the combination of, a body defining an insert receiving pocket including a platform and at least one abutment upstanding therefrom, a generally flat insert resting on said platform and having an aperture with an upwardly flaring frusto-conical recess providing a seat whose axis is normal to the plane of the insert, a plurality of cutting edges spaced around the periphery of said insert and each adapted to be located in a cutting position by indexing of the insert on said platform, a screw having a frusto-conical head mating with the surface of said recess and a shank of smaller diameter than said insert aperture extending through said aperture and threading into an upright screw hole in said platform, the upper end of the axis of said screw hole being tilted at a small angle relative to the axis of said seat and toward said abutment whereby upon tightening of said screw the insert is cammed edgewise and toward said abutment by the screw head engaging said seat and the screw shank is bent laterally, as permitted by the clearance within said aperture, to allow the screw head to come into substantially full peripheral surface engagement with said seat.
Claim 6
Dependent Claim
61 words
A cutting tool as defined in claim 3 in which the length of said screw shank between said seat and the upper end of said screw hole is free to bend laterally and allow said screw head to engage said seat substantially around the full periphery thereof in the final tightening of the screw to clamp said insert against said platform.
Claim 7
Dependent Claim
36 words
A cutting tool as defined in claim 4 in which the unsupported length of said screw shank includes a length disposed within a recess countersunk in said body at the upper end of said screw hole.
Claim 8
Dependent Claim
64 words
A cutting tool as defined in claim 3 in which opposite ends of said insert aperture are formed with frusto-conical recesses whose surfaces converge axially toward each other to a diameter at their adjacent ends enough greater than the diameter of said screw shank to permit lateral bending thereof to allow full seating of the screw head in the outer one of said recesses.
Claim 9
Dependent Claim
222 words
In a cutting tool, the combination of, a body defining an insert receiving pocket including a platform and at least one abutment projecting outwardly therefrom, a wafer-like cutting insert resting on said platform and having an aperture with an outwardly flaring frusto-conical recess providing a seat whose axis is normal to the plane of the insert, a plurality of cutting edges spaced around the periphery of said insert and each adapted to be located in a cutting position by indexing of the insert on said platform, a screw having a frusto-conical head mating with the surface of said recess and a shank of smaller diameter than said insert aperture extending through said aperture and into a screw hole opening outwardly of said platform, said screw head and screw shank being coaxial prioR to tightening of said screw, the outer end of the axis of said screw hole being tilted at a small angle relative to the axis of said seat and toward said abutment whereby upon tightening of said screw the insert is cammed edgewise and toward said abutment by the screw head engaging said seat and the screw shank is bent laterally relative to the screw head, as permitted by the clearance within said aperture, to allow the screw head to come into substantially full peripheral surface engagement with said seat.
Claim 10
Dependent Claim
222 words
In a cutting tool, the combination of, a body defining an insert receiving pocket including a platform and at least one abutment projecting outwardly therefrom, a wafer-like cutting insert resting on said platform and having an aperture with an outwardly flaring frusto-conical recess providing a seat whose axis is normal to the plane of the insert, a plurality of cutting edges spaced around the periphery of said insert and each adapted to be located in a cutting position by indexing of the insert on said platform, a screw having a frusto-conical head mating with the surface of said recess and a shank of smaller diameter than said insert aperture extending through said aperture and into a screw hole opening outwardly of said platform, said screw head and screw shank being coaxial prioR to tightening of said screw, the outer end of the axis of said screw hole being tilted at a small angle relative to the axis of said seat and toward said abutment whereby upon tightening of said screw the insert is cammed edgewise and toward said abutment by the screw head engaging said seat and the screw shank is bent laterally relative to the screw head, as permitted by the clearance within said aperture, to allow the screw head to come into substantially full peripheral surface engagement with said seat.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |