Karen R Craig, 59235 W Venango St, Mercer, PA 16137

6811359, Nov 2, 2004

May 31, 2002

10/161489

Karen A. Craig - Ligonier PA

Kennametal Inc. - Latrobe PA

B26D 112

407 35, 407113

A cutter system that is designed to create a continuous cutting true helix while having true helical inserts that are indexable on at least two cutting edges. The shape of the insert allows an interlocking overlap of the cutting edges for an all effective true helical cut. The helix ground into the insert faces creates a smooth cutting action as a solid helical endmill. High positive radial and axial rakes enable free cutting machining with a fine finish and low horsepower consumption. The back of the insert has a diamond shaped island that is used for locating the insert in the mounting pocket of the cutter and is used for face contact on lockup when the insert screw is tightened. The mounting pocket is designed for ease of manufacture to limit tolerance buildup to ensure repeatable insert positioning and to maintain accuracy for a fine cutting finish. The insert screw hole is placed in the cross hole location for allowing an unobstructed cutting face and a larger diameter center core in the cutter body. The larger core creates maximum strength and allows longer cutting lengths.

7070363, Jul 4, 2006

Jul 15, 2004

10/891677

Shawn E. Frye - Latrobe PA, US
Karen A. Craig - Greensburg PA, US

Kennametal Inc. - Latrobe PA

B23C 5/20

407113, 407114, 407115, 407116

An indexable cutting insert () having a top surface () including a substantially planar central portion (), a substantially planar bottom surface (), and a plurality of side surfaces (). A long cutting edge (), a corner radius cutting edge (), a facet radius cutting edge (), and ramping cutting edge () are defined at an intersection between the top surface () and one of the side surfaces (). A margin () extends around a nose radius of the cutting insert () and blends into a flat surface (). A margin angle, C, formed by the margins () is less than a seating angle, B, formed by the flat surfaces (). The top surface () includes a plurality of upward sloping radius blends () extending between the substantially planar central portion () and a plurality of upward sloping rake faces () extending between a respective radius blend and its respective cutting edge such that the rake face forms an angle, A, of between five and twenty-five degrees with respect to the central portion () of the top surface ().

7090444, Aug 15, 2006

Jun 13, 2005

11/151025

Karen A. Craig - Ligonier PA, US

Kennametal Inc. - Latrobe PA

B26D 1/00

407113

An indexable, helical cutting insert includes at least one axial clearance slash extending from a bottom surface to one of said side walls forming a wiper on an edge of the axial clearance slash. In another embodiment, the cutting insert includes at least one inside cutting edge that extends outwardly a distance from the side wall. In another embodiment, the helical cutting insert includes at least one progressive cutting edge. In another embodiment, the cutting insert includes at least one helical cutting edge that is curved inwardly to enable the cutting insert to perform machining operations on cutters having different diameters.

7125207, Oct 24, 2006

Aug 6, 2004

10/912927

Karen A. Craig - Greensburg PA, US
Filho Ruy Frota de Souza - Latrobe PA, US

Kennametal Inc. - Latrobe PA

B23B 51/06
B23C 5/28

409136, 409234, 279 8, 408 57, 408233, 407 11

A cutting tool including a cutter body and a locking screw. The cutter body has one or more pockets for receiving one or more cutting inserts and at least one channel for delivering coolant from a milling machine to the cutting inserts.

7144205, Dec 5, 2006

May 9, 2003

10/435062

Glenn W. Sheffler - Blairsville PA, US
Jeffrey F. Kovac - Latrobe PA, US
Kevin M. Gamble - Stahlstown PA, US
Karen A. Craig - Ligonier PA, US

Kennametal Inc. - Latrobe PA

B23C 5/20
B23C 5/22

407103, 407104, 407113, 407 48, 408713

An insert retention screw has a head with a radius that is a sufficient size to fit within a mounting hole of a cutting insert and seat within a seating plane within the mounting hole that is generally perpendicular to the axis of the insert when the screw is at an angle in a range of about 0–15 degrees. The retention screw is provided for holding a cutting insert in the pocket of a tool body. The pocket is partially defined by a floor and a seating surface. A threaded hole is at an angle that is taken with reference to the pocket floor. The insert has a mounting hole passing therethrough. The retention screw passes through the mounting hole and threads into the threaded hole so as to draw the insert against the seating surface. Orienting the insert retention screw at an angle is accomplished by selecting a tool body and a cutting insert, determining the frictional force between the tool body and cutting insert, and determining an angle for the retention screw, wherein a force component of the retention screw is greater than or equal to the frictional force between the tool body and the cutting insert.

7229236, Jun 12, 2007

Jun 13, 2005

11/150958

Karen A. Craig - Ligonier PA, US

Kennametal Inc. - Latrobe PA

B23C 5/20

407113, 407114

An indexable, helical cutting insert includes at least one axial clearance slash extending from a bottom surface to one of said side walls forming a wiper on an edge of the axial clearance slash. In another embodiment, the cutting insert includes at least one inside cutting edge that extends outwardly a distance from the side wall. In another embodiment, the helical cutting insert includes at least one progressive cutting edge. In another embodiment, the cutting insert includes at least one helical cutting edge that is curved inwardly to enable the cutting insert to perform machining operations on cutters having different diameters.

7357604, Apr 15, 2008

Jun 20, 2006

11/471046

Karen A. Craig - Greensburg PA, US

Kennametal Inc. - Latrobe PA

B23B 27/16

407113, 407 42, 407115

An indexable cutting insert includes a first component with an outer or top surface and side surfaces. A third component is mirror symmetric with respect to the first component about a vertical or y-axis of the cutting insert. A second component is disposed between the first and third components. Multiple cutting edges are defined at an intersection between the side surfaces and the top surface, wherein the cutting edges define a positive axial rake angle. In one embodiment, the first and third components are in the shape of a polygonal with a star appearance, and the second component is in the shape of a square. The first and third components are offset from one another by a first offset angle, while the second component is offset from the first and third components by a second offset angle to allow the cutting insert to be indexable.

7396192, Jul 8, 2008

Nov 30, 2006

11/565139

Karen A. Craig - Greensburg PA, US

Kennametal Inc. - Latrobe PA

B23C 5/20
B26D 7/00

407113, 407114, 407116

An indexable, helical cutting insert includes at least one axial clearance slash extending from a bottom surface to one of said side walls forming a wiper on an edge of the axial clearance slash. In another embodiment, the cutting insert includes at least one inside cutting edge that extends outwardly a distance from the side wall. In another embodiment, the helical cutting insert includes at least one progressive cutting edge. In another embodiment, the cutting insert includes at least one helical cutting edge that is curved inwardly to enable the cutting insert to perform machining operations on cutters having different diameters.