Patents Represented by Attorney, Agent or Law Firm John J. Prizzi
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Patent number: 5697308Abstract: A seed boot for use with a furrow forming disk of a grain drill for depositing seed within a furrow. The seed boot includes a housing having an inner side, an outer side and a furrow firming edge. The furrow firming edge extends between a lower edge of the inner side and a lower edge of the outer side. The furrow firming edge includes an opening positioned below an axis of the disk and in communication with an internal seed delivery tube that extends the length of the housing. At least one side wear insert is attached to the lower edge of the outer side of the seed boot to prevent side and down force wear of the seed boot.Type: GrantFiled: December 20, 1995Date of Patent: December 16, 1997Assignee: Kennametal Inc.Inventor: Don C. Rowlett
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Patent number: 5694820Abstract: A short-stroke clamping apparatus for detachably connecting a tool unit to a tool supporter is provided of the type having a canister member which includes apertures for admitting spherical locking elements, and a lock rod that is reciprocally movable a stroke distance along an axis and which has cam portions for moving the spherical locking elements through the canister apertures into engagement with the tool unit. In the clamping apparatus, the canister member apertures are elongated along the stroke axis. This allows the spherical locking elements to move axially along the cam portions of the lock rod as well as radially, such that locking engagement can be achieved with a shorter axial stroke movement of the lock rod. The aperture walls may also be angled to allow even greater axial movement of the locking elements, which not only further shortens the lock rod stroke, but can increase the gripping force that the clamping apparatus applies to the tool unit.Type: GrantFiled: December 20, 1995Date of Patent: December 9, 1997Assignee: Kennametal Inc.Inventors: Robert A. Erickson, Greg W. Needham
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Patent number: 5690393Abstract: A cutting tool retention system for retaining a cutting tool having a tool recess. The cutting tool retention system comprises a support block having a block bore and a block recess intersecting the block bore and a clip movably situated in the block recess, the clip having a spring structure which engages the support block and urges the clip into an engaging relationship with the tool recess of the cutting tool situated within the block bore, the spring structure allowing the clip to be disengaged from an engaging relationship with the tool recess of the cutting tool situated within the block bore by applying force directly to the clip so as to overcome the urging of the spring structure.Type: GrantFiled: May 1, 1996Date of Patent: November 25, 1997Assignee: Kennametal Inc.Inventors: Ted R. Massa, Robert H. Montgomery, Jr.
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Patent number: 5685381Abstract: A drill bit is fictionally received over a drill rod via complementary generally frusto-conical male formation and socket. The socket has an inwardly protruding face at an angle with the longitudinal axis of the drill rod. The male formation on the drill rod has a depression in the form of an area where the convexity of the frusto-conical portion has been flattened at an angle so as to form a rocking formation at a selective location relative to the opposite ends of the male formation and the socket. A clearance space diverges away from the rocking formation toward a selective ends of the male formation and the socket. The frusto-conical male formation and the socket are a-circular and form positive driving engagement between the drill rod and the drill bit. An impact at the point of maximum clearance causes rocking about the rocking formation to break static friction and to facilitate release of the drill bit from the drill rod.Type: GrantFiled: November 1, 1995Date of Patent: November 11, 1997Assignee: Kennametal South Africa (Proprietary) LimitedInventors: Stephanus Frederick Kloppers, Jean Frederick Kloppers
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Patent number: 5678960Abstract: The invention relates to a twist drill, especially for metals. It has a substantially cylindrical basic component (1) divided into a shaft (2) and a cutting section (3), the central longitudinal axis (5) of which is the axis of rotation of the twist drill. Several swarf grooves (4, 4') are made in the cylindrical surface of the basic component (1) which extend spirally and continuously from the shaft (2) to the drill tip (6) and bound a swarf chamber (35). The feature of the twist drill is that its drill core diameter tapers continuously from the drill tip (6) to the shaft (2).Type: GrantFiled: February 2, 1996Date of Patent: October 21, 1997Assignee: Kennametal Hertel AGInventors: Werner Just, Dieter Muhlfriedel
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Patent number: 5672031Abstract: A milling cutter for milling a workpiece comprising a milling head rotatable about its central longitudinal axis. A milling head carries at least one milling insert of a first grade which presents a cutting edge. The milling head carries a wiper insert of a second grade which presents a wiping edge.Type: GrantFiled: May 12, 1995Date of Patent: September 30, 1997Assignee: Kennametal Inc.Inventor: Edward J. Oles
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Patent number: 5655860Abstract: A milling cutter for milling a workpiece comprising a milling head rotatable about its central longitudinal axis. A milling head carries at least one milling insert of a first grade which presents a cutting edge. The milling head carries a wiper insert of a second grade which presents a wiping edge.Type: GrantFiled: October 18, 1995Date of Patent: August 12, 1997Assignee: Kennametal Inc.Inventor: Edward J. Oles
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Patent number: 5653152Abstract: A toolholder for removing material from a workpiece wherein the workpiece and toolholder are rotatable with respect to one another. The toolholder includes a body having a plurality of pockets. A roughing insert is carried in one of the pockets of the body. The roughing insert presents a roughing edge. The roughing insert is of a first grade. A finishing insert is carried in another of the pockets of the body. The finishing insert presents a finishing edge. The finishing insert is of a grade different than that of the roughing insert.Type: GrantFiled: September 1, 1995Date of Patent: August 5, 1997Assignee: Kennametal Inc.Inventors: Edward J. Oles, John J. Prizzi
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Patent number: 5651295Abstract: Machining of internal and external grooves in aluminum based alloys is performed through the use of a sharp edge physical vapor deposition coated cemented carbide cutting tool.Type: GrantFiled: April 17, 1996Date of Patent: July 29, 1997Assignees: Kennametal Inc., General Motors CorportionInventors: Russell J. Tumey, Robert L. De Corte, Donald R. Hart, Alvin J. Lang
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Patent number: 5647641Abstract: A mining drum assembly for use in the mining of a substrate that has a drum. A plurality of bars, each one of the bars has a plurality of laterally-spaced apart mining bit assemblies connected thereto, are affixed to the surface of the drum. The bars define first and second regions of discrete bars equi-spaced about the circumference of the drum. The bars of the first region being circumferentially and laterally spaced-apart from the bars of the second region.Type: GrantFiled: June 12, 1996Date of Patent: July 15, 1997Assignees: Kennametal Inc., Advanced Cutting Systems Corp.Inventors: William P. Sulosky, Wayne H. Beach
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Patent number: 5648119Abstract: A diamond-coated tool and a process for making them. The process includes a sintering step. In that step, a substrate is sintered in an atmosphere and for a time and at a temperature so that superficial, exaggerated grain growth is promoted that imparts a surface roughness which may serve as anchoring sites during a subsequent diamond coating step which is performed by a vapor deposition technique. The diamond-coated tool or wear part includes a large grain substrate surface, and a high bond strength between the diamond coating and the substrate surface.Type: GrantFiled: May 10, 1995Date of Patent: July 15, 1997Assignee: Kennametal Inc.Inventors: George P. Grab, William M. Melago, Edward J. Oles, Charles Erik Bauer, Aharon Inspektor, Gerald D. Murray
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Patent number: 5639180Abstract: A mining drum assembly for use in the mining of a substrate that has a drum. A plurality of bars, each one of the bars has a plurality of laterally-spaced apart mining bit assemblies connected thereto, are affixed to the surface of the drum. The bars define first and second regions of discrete bars equi-spaced about the circumference of the drum. The bars of the first region being circumferentially and laterally spaced-apart from the bars of the second region.Type: GrantFiled: June 12, 1996Date of Patent: June 17, 1997Assignees: Kennametal Inc., Advanced Cutting Systems Corp.Inventors: William P. Sulosky, Wayne H. Beach
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Patent number: 5632941Abstract: A densified titanium diboride based ceramic composition is provided having W and Co therein and a fine grain size. The composition has particular usefulness as a cutting tool for the machining of titanium based alloys at high speeds.Type: GrantFiled: April 20, 1995Date of Patent: May 27, 1997Assignee: Kennametal Inc.Inventors: Pankaj K. Mehrotra, Deepak P. Ahuja, Holly S. Brooks
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Patent number: 5628549Abstract: A tool sleeve rotation limitation system for reducing the rotation of a tool sleeve within a block bore of a support block, the tool sleeve having a sleeve engagement surface and the block bore having a block engagement surface. The tool sleeve rotation limitation system comprises a rotation limitation member located between the tool sleeve and the block bore so as to engage the tool engagement surface and the sleeve engagement surface and reduce rotation of the tool sleeve within the block bore, the rotation limitation member having a member perimeter which conforms to at least one of the sleeve engagement surface and the block engagement surface. Alternatively the tool sleeve rotation limitation system comprises a resilient rotation limitation member located between the tool sleeve and the block bore so as to frictionally engage the tool sleeve and the block bore and reduce rotation of the tool sleeve within the block bore.Type: GrantFiled: December 13, 1995Date of Patent: May 13, 1997Assignee: Kennametal Inc.Inventors: Cary D. Ritchey, Robert H. Montgomery, Jr.
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Patent number: 5607206Abstract: An excavation cutting tool holder retention system. The cutting tool holder retention system includes a cutting tool holder having a holder engagement surface and a support block having a tool holder bore into which the cutting tool holder is inserted. A pin having a pin engagement surface is movably mounted to the support block such that the pin engagement surface may be moved to engage the holder engagement surface. At least one of the holder and pin engagement surfaces defines an inclined surface such that when the pin engagement surface is moved to engage the holder engagement surface, the shank portion of the cutting tool holder will be drawn into the tool holder bore. In the preferred embodiment, at least one of the cutting tool holder and tool holder bore is tapered such that the cutting tool holder will be drawn and wedged into the tool holder bore of the support block when the pin engagement surface is moved to engage the holder engagement surface.Type: GrantFiled: August 2, 1995Date of Patent: March 4, 1997Assignee: Kennametal Inc.Inventors: David R. Siddle, Ted R. Massa
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Patent number: 5605382Abstract: A cutting tool retention system for retaining a cutting tool having a recess. The cutting tool retention system including a support block having a main bore and a spring seat. A pin is movably mounted to the spring seat. A spring member is positioned between the spring seat and the pin so as to urge the pin into an engaging relationship with the recess of the cutting tool inserted in the main bore of the support block such that the cutting tool cannot be removed from the main bore unless the pin is withdrawn from an engaging relationship with the recess of the cutting tool.Type: GrantFiled: August 2, 1995Date of Patent: February 25, 1997Assignee: Kennametal Inc.Inventor: Ted R. Massa
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Patent number: 5589268Abstract: A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder including macrocrystalline tungsten carbide particles, crushed sintered cemented macrocrystalline tungsten carbide particles, tungsten carbide, and an iron-based component.Type: GrantFiled: February 1, 1995Date of Patent: December 31, 1996Assignee: Kennametal Inc.Inventors: Harold E. Kelley, William E. Silvis, Charles J. Terry
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Patent number: 5585176Abstract: A diamond-coated tool or wear part and a process for making them. The process includes a sintering step. In that step, a substrate is sintered in an atmosphere and for a time and at a temperature so that superficial, exaggerated grain growth is promoted that imparts a surface roughness which may serve as anchoring sites during a subsequent diamond coating step which is performed by a vapor deposition technique. The diamond-coated tool or wear part includes a large grain substrate surface, and a high bond strength between the diamond coating and the substrate surface.Type: GrantFiled: November 30, 1993Date of Patent: December 17, 1996Assignee: Kennametal Inc.Inventors: George P. Grab, William M. Melago, Edward J. Oles, Gerald D. Murray, Charles E. Bauer, Aharon Inspektor
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Patent number: 5580836Abstract: A densified titanium diboride based ceramic composition is provided having W and Co therein and a fine grain size. The composition has particular usefulness as a cutting tool for the machining of titanium based alloys at high speeds.Type: GrantFiled: April 20, 1995Date of Patent: December 3, 1996Assignee: Kennametal Inc.Inventors: Pankaj K. Mehrotra, Deepak P. Ahuja, Holly S. Brooks
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Patent number: 5542795Abstract: A milling cutter for performing plunge and face cutting operations on a workpiece with cutting inserts having different shapes is provided that comprises a plurality of cutting inserts having side and transverse cutting edges, the transverse cutting edges being of different shapes for different inserts, a cutter body having a plurality of recessed insert seats for securably receiving the inserts, including a top shoulder spaced apart from the transverse cutting edges of the inserts for allowing the insert seat to receive inserts having transverse edges of different shapes, and a support structure for preventing relative movement between the cutting inserts and their respective seats along the side and transverse insert edges.Type: GrantFiled: January 30, 1995Date of Patent: August 6, 1996Assignee: Kennametal Inc.Inventor: Robert N. Mitchell