Patents by Inventor Linn R. Andras
Linn R. Andras has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20110027022Abstract: A metal cutting system with a tool holder, a shim, an insert with a top depression, a top piece and a clamp. A rake face cooling channel for fluid delivery is formed between the top piece and the depression in the insert. A primary discharge slot at the end of the rake face cooling channel delivers fluid from below the cutting edge of the insert. A second cooling channel for delivery of fluid to the flank face is formed between the insert and the shim or is formed between the shim and the tool holder with a portion of the cooling channel passing through the shim.Type: ApplicationFiled: October 7, 2010Publication date: February 3, 2011Applicant: Kennametal Inc.Inventors: Paul D. Prichard, Linn R. Andras, Ted Richard Massa
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Publication number: 20110027024Abstract: A cutting insert for use in chipforming and material removal from a workpiece wherein coolant is supplied to the cutting insert from a coolant source. The cutting insert includes at least one discrete cutting location and at least one distinct internal channel that corresponds to the cutting location. The internal channel has an inlet to receive coolant and an outlet to exit coolant. The outlet is proximate to the cutting location, and the inlet is radial inward of the outlet.Type: ApplicationFiled: October 13, 2010Publication date: February 3, 2011Applicant: Kennametal Inc.Inventors: Paul D. Prichard, Linn R. Andras
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Publication number: 20110027023Abstract: A cutting insert for use in chipforming and material removal from a workpiece wherein coolant is supplied to the cutting insert from a coolant source. The cutting insert includes at least one discrete cutting location and at least one distinct internal channel that corresponds to the cutting location. The internal channel has an inlet to receive coolant and an outlet to exit coolant. The outlet is proximate to the cutting location, and the inlet is radial inward of the outlet.Type: ApplicationFiled: October 13, 2010Publication date: February 3, 2011Applicant: Kennametal Inc.Inventors: Paul D. Prichard, Linn R. Andras
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Publication number: 20110020076Abstract: A metal cutting system with a tool holder, a shim, an insert with a top depression, a top piece and a clamp. A rake face cooling channel for fluid delivery is formed between the top piece and the depression in the insert. A primary discharge slot at the end of the rake face cooling channel delivers fluid from below the cutting edge of the insert. A second cooling channel for delivery of fluid to the flank face is formed between the insert and the shim or is formed between the shim and the tool holder with a portion of the cooling channel passing through the shim.Type: ApplicationFiled: October 7, 2010Publication date: January 27, 2011Applicant: Kennametal Inc.Inventors: Paul D. Prichard, Linn R. Andras, Ted Richard Massa
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Publication number: 20110020075Abstract: A metal cutting system with a tool holder, a shim, an insert with a top depression, a top piece and a clamp. A rake face cooling channel for fluid delivery is formed between the top piece and the depression in the insert. A primary discharge slot at the end of the rake face cooling channel delivers fluid from below the cutting edge of the insert. A second cooling channel for delivery of fluid to the flank face is formed between the insert and the shim or is formed between the shim and the tool holder with a portion of the cooling channel passing through the shim.Type: ApplicationFiled: October 7, 2010Publication date: January 27, 2011Applicant: Kennametal Inc.Inventors: Paul D. Prichard, Linn R. Andras, Ted Richard Massa
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Publication number: 20110020072Abstract: A cutting insert-shim assembly that has a cutting insert with a bottom surface and a plurality of interior coolant passages wherein each interior coolant passage has a coolant inlet in the bottom surface of the cutting insert. The shim has a first side surface and a second side surface and contains a cavity, which communicates with the coolant conduit. The cavity defines a first opening in the first side surface and a second opening in the second side surface. When the shim is in a first condition, the first side surface contacts the bottom surface of the cutting insert and the first opening provides a first level of coolant communication to the interior coolant passages in the cutting insert. When the shim is in a second condition, the second side surface contacts the bottom surface of the cutting insert and the second opening provides a second level of coolant communication to the interior coolant passages in the cutting insert.Type: ApplicationFiled: September 1, 2010Publication date: January 27, 2011Applicant: Kennametal Inc.Inventors: Shi Chen, Nicholas Joseph Henry, Charles Lisle Conway, Kent Peter Mizgalski, Joseph V. Nelson, Linn R. Andras, Thomas O. Muller, Paul D. Prichard, Brad D. Hoffer
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Publication number: 20110020073Abstract: A cutting assembly that is useful in an operation for chipforming removal of material from a workpiece. The cutting assembly includes a holder having a seat and containing a coolant delivery passage. A locking pin, which has a longitudinal locking pin bore, is affixed to the seat so the longitudinal locking pin bore is in communication with the coolant delivery passage. A cutting insert has a rake surface, a corner cutting edge region, a central cutting insert aperture, and a radial coolant trough with an orientation toward the corner cutting edge region. At least a portion of the locking pin is within the central cutting insert aperture. A clamp assembly attaches to the holder and engages the cutting insert. The clamp assembly has a diverter plate, which has a bottom surface defining a diverter bowl and a diverter channel.Type: ApplicationFiled: September 2, 2010Publication date: January 27, 2011Applicant: Kennametal Inc.Inventors: Shi Chen, Nicholas Henry, Charles Lisle Conway, Kent P. Mizgaiski, Paul D. Prichard, Linn R. Andras, Ted R Massa
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Patent number: 7802945Abstract: A milling cutter (10) comprises a cutter body (12) having at least two operational annular rings (13, 14). An outer ring (13) is provided for rough milling and includes a plurality of cutting inserts spaced about the periphery of the cutter body. Positioned radially inward of the outer ring (13) is at least one ring (14) comprises a coating of abrasive material. As a result, a workpiece can be both tough and finish milled by a single milling cutter (10) with the rough cutting inserts (18) and the abrasive material.Type: GrantFiled: February 26, 2004Date of Patent: September 28, 2010Assignee: Kennametal Inc.Inventors: Glenn W. Sheffler, Gregory A. Hyatt, Paul D. Prichard, Linn R. Andras
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Patent number: 7625157Abstract: A cutting insert assembly for use in chipforming and material removal wherein the cutting insert assembly is received in a pocket of a cutter body wherein coolant can flow out of a pocket opening contained in the pocket. The cutting insert assembly includes a cutting insert body that presents at least two discrete cutting locations. The cutting insert body contains a coolant entry passage aligned with the pocket opening for coolant to flow through the coolant entry passage. The cutting insert body has a rake surface that contains at least two of the discrete depressions wherein each one of the discrete depressions corresponds to one of the cutting locations. Each one of the discrete depressions extends toward its corresponding cutting location. The assembly includes a diverter that is positioned adjacent to the cutting insert body wherein the diverter has a receiving opening aligned with the coolant entry passage to receive coolant through the coolant entry passage.Type: GrantFiled: January 18, 2007Date of Patent: December 1, 2009Assignee: Kennametal Inc.Inventors: Paul D. Prichard, Linn R. Andras
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Patent number: 7611313Abstract: A cutting insert rotated about its axis may be utilized during a metalworking operation and applied against the rotating workpiece to enhance tool performance. A method, including an assembly with a rotatable insert mounted to a toolholder may be utilized to achieve this result.Type: GrantFiled: December 28, 2006Date of Patent: November 3, 2009Assignee: Kennametal Inc.Inventors: Gregory A. Hyatt, Linn R. Andras, Ted R. Massa
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Publication number: 20080271581Abstract: A toolholder with a controllable critical angle, such as a lead, trailing, rake or clearance angles, includes a tool spindle for retaining the toolholder in a tool rest of a machine tool. The machine tool includes at least one linear axis, for example, three mutually perpendicular axes, a rotary axis and a rotation axis. The rotary axis and/or rotation axis is controllable to move to a specified position in synchronization with a movement of one of the linear axes. An adaptor supports a cutting tool that is retained in the adaptor by a clamp. The cutting tool defines a critical angle, such as a lead angle, a trailing angle, a rake angle and a flank clearance angle, wherein the critical angle is corrected as a vector of movement of at least one of the linear axis is changed. In addition, the cutting tool can be positioned on opposite side of a centerline of rotation of the workpiece to effectively double the life of the cutting tool. A method of controlling a toolholder is also disclosed.Type: ApplicationFiled: July 8, 2008Publication date: November 6, 2008Applicant: KENNAMETAL INC.Inventors: Gregory A. Hyatt, Ted R. Massa, Linn R. Andras, James J. Stohr
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Patent number: 7416372Abstract: A toolholder (50) with a controllable critical angle, such as a lead, trailing, rake or clearance angles, includes a tool spindle (42a) for retaining the toolholder in a tool rest (42) of a machine tool. The machine tool (10) includes at least one linear axis, for example, three mutually perpendicular axes, a rotary axis and a rotation axis. The rotary axis and/or rotation axis is controllable to move to a specified position in synchronization with a movement of one of the linear axes. An adaptor (54) supports a cutting tool (56) that is retained in the adaptor by a clamp (58). The cutting tool (56) defines a critical angle, such as a lead angle, a trailing angle, a rake angle and a flank clearance angle, wherein the critical angle is corrected as a vector of movement of at least one of the linear axis is changed. In addition, the cutting tool (56) can be positioned on opposite side of a centerline of rotation of the workpiece to effectively double the life of the cutting tool.Type: GrantFiled: September 2, 2003Date of Patent: August 26, 2008Assignee: Kennametal Inc.Inventors: Gregory A. Hyatt, Ted R. Massa, Linn R. Andras, James J. Stohr
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Publication number: 20080181736Abstract: A milling cutter (10) comprises a cutter body (12) having at least two operational annular rings (13, 14). An outer ring (13) is provided for rough milling and includes a plurality of cutting inserts spaced about the periphery of the cutter body. Positioned radially inward of the outer ring (13) is at least one ring (14) comprises a coating of abrasive material. As a result, a workpiece can be both tough and finish milled by a single milling cutter (10) with the rough cutting inserts (18) and the abrasive material.Type: ApplicationFiled: February 26, 2004Publication date: July 31, 2008Applicant: KENNAMETAL INC.Inventors: Glenn W. Sheffler, Gregory A. Hyatt, Paul D. Prichard, Linn R. Andras
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Publication number: 20080175676Abstract: A cutting insert for use in chipforming and material removal from a workpiece wherein coolant is supplied to the cutting insert from a coolant source. The cutting insert includes at least one discrete cutting location and at least one distinct internal channel that corresponds to the cutting location. The internal channel has an inlet to receive coolant and an outlet to exit coolant. The outlet is proximate to the cutting location, and the inlet is radial inward of the outlet.Type: ApplicationFiled: January 18, 2007Publication date: July 24, 2008Inventors: Paul D. Prichard, Linn R. Andras
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Publication number: 20080175678Abstract: A metal cutting system with a tool holder, a shim, an insert with a top depression, a top piece and a clamp. A rake face cooling channel for fluid delivery is formed between the top piece and the depression in the insert. A primary discharge slot at the end of the rake face cooling channel delivers fluid from below the cutting edge of the insert. A second cooling channel for delivery of fluid to the flank face is formed between the insert and the shim or is formed between the shim and the tool holder with a portion of the cooling channel passing through the shim.Type: ApplicationFiled: January 18, 2007Publication date: July 24, 2008Inventors: Paul D. Prichard, Linn R. Andras
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Publication number: 20080175677Abstract: A cutting insert assembly for use in chipforming and material removal wherein the cutting insert assembly is received in a pocket of a cutter body wherein coolant can flow out of a pocket opening contained in the pocket. The cutting insert assembly includes a cutting insert body that presents at least two discrete cutting locations. The cutting insert body contains a coolant entry passage aligned with the pocket opening for coolant to flow through the coolant entry passage. The cutting insert body has a rake surface that contains at least two of the discrete depressions wherein each one of the discrete depressions corresponds to one of the cutting locations. Each one of the discrete depressions extends toward its corresponding cutting location. The assembly includes a diverter that is positioned adjacent to the cutting insert body wherein the diverter has a receiving opening aligned with the coolant entry passage to receive coolant through the coolant entry passage.Type: ApplicationFiled: January 18, 2007Publication date: July 24, 2008Inventors: Paul D. Prichard, Linn R. Andras
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Patent number: 7311478Abstract: A tool holder (20) comprises a body portion (32), a support member assembly (33) mounted to the body portion and an insert-receiving cartridge (36) removably received in the support member. The insert-receiving cartridge (36) includes a pocket (38) for mounting a cutting insert (40) thereon. The support member assembly (33) includes a bore and the insert-receiving cartridge (36) includes a shank capable of being received in the bore. The combination of the insert-receiving cartridge (36) and the cutting insert (40) forms a cutting tool for a particular cutting operation. In one embodiment, the cutting tools are radially mounted to a side periphery of the body portion (32) such that the vertical axis of the cutting tool is substantially parallel to the longitudinal axis (L) of the toolholder (20).Type: GrantFiled: September 2, 2003Date of Patent: December 25, 2007Assignee: Kennametal Inc.Inventors: Robert A. Erickson, Linn R. Andras
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Patent number: 7156006Abstract: A cutting insert rotated about its axis may be utilized during a metalworking operation and applied against the rotating workpiece to enhance tool performance. A method, including an assembly with a rotatable insert mounted to a toolholder may be utilized to achieve this result.Type: GrantFiled: September 2, 2003Date of Patent: January 2, 2007Assignee: Kennametal Inc.Inventors: Gregory A. Hyatt, Linn R. Andras, Ted R. Massa
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Patent number: 7073986Abstract: A wear insert for a tool holder includes a top surface and a bottom surface with a dimple disposed in the top surface. A boss is disposed within the dimple. The tool holder for releasably securing the wear insert has a tool holder body including an insert-receiving pocket formed at a forward end. The tool holder body has a bottom and at least one side wall for receiving an insert. The tool holder includes an internally threaded clamp-securing bore formed between an inclined surface and the insert-receiving pocket. A clamp is arranged on the tool holder body and including a lower face with a nose portion having a shaped lip and a clamp contour portion. The clamp also has a threaded aperture formed therethrough. A clamp screw is inserted into the threaded aperture of the clamp.Type: GrantFiled: November 8, 2001Date of Patent: July 11, 2006Assignee: Kennametal Inc.Inventor: Linn R. Andras
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Patent number: 6991410Abstract: The invention provides a toolholder assembly including a body and a nest that is suitable for holding an insert. The nest includes a notch and the body includes a support and protrusion that cooperates with the notch to permit indexing of the nest relative to the support. In one embodiment, the support includes a bias device, such as a spring, that at least partially biases the nest toward the support and an adjustment device that can at least partially counter the bias device. The invention is also directed to a toolholder assembly that additionally includes an insert and a clamp. The invention further contemplates a method for forming the assembly and a method for adjusting or indexing the orientation of the nest.Type: GrantFiled: October 8, 2003Date of Patent: January 31, 2006Assignee: Kennametal Inc.Inventors: Linn R. Andras, John J. Baca