Patents by Inventor Don C. Rowlett
Don C. Rowlett 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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Patent number: 7883153Abstract: A road milling drum assembly that is for use with a road milling machine. The road milling drum includes a core portion carrying a first road planing bit assembly wherein the core portion detachably connects to the road milling machine. The first road planing bit assembly has a first milling width. The assembly further including one of the following components selected from the group of: (1) a protective cover that detachably connects to the core portion and the road milling machine; or (2) a milling extension segment carrying a second road planing bit assembly wherein the milling extension segment detachably connects to the core portion and the road milling machine. The second road planing bit assembly has a second milling width wherein the road milling drum has a milling width equal to the sum of the first milling width and the second milling width.Type: GrantFiled: September 10, 2007Date of Patent: February 8, 2011Assignee: Kennametal Inc.Inventors: Stephen P. Stiffler, Eric P. Helsel, Donald E. Keller, Don C. Rowlett
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Publication number: 20100052407Abstract: A rotatable cutting tool that is useful for impingement upon a substrate and is adapted to be rotatably retained within the bore of a holder. The rotatable cutting tool includes an elongate cutting tool body, which has an axial forward end and an axial rearward end, as well as a socket at the axial forward end thereof. The rotatable cutting tool also includes a hard cutting member that is affixed to the cutting tool body within the socket. The hard cutting member has an axial forward end and an axial rearward end. The hard cutting member has a superhard axial forward portion at the axial forward end thereof wherein the superhard axial forward portion has a maximum transverse dimension. The hard cutting member further has a hard axial rearward portion contiguous with and axial rearward of the superhard axial forward portion. The hard axial rearward portion has a maximum transverse dimension.Type: ApplicationFiled: March 4, 2009Publication date: March 4, 2010Applicant: Kennametal Inc.Inventors: Vernon B. Cameron, Don C. Rowlett, Randall W. Ojanen
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Patent number: 7665234Abstract: A grader blade includes a grader blade body that has a recess in a bottom edge, and a tri-grade insert assembly is received within the recess. The tri-grade insert assembly includes a leading insert, a mediate insert and a trailing insert. The leading insert has an impact wear resistance and fracture wear resistance greater than the mediate insert and the trailing insert. The trailing insert has an abrasion wear resistance and down-pressure wear resistance greater than the leading insert and the mediate insert. The mediate insert has an impact wear resistance and fracture wear resistance greater than the trailing insert and an abrasion wear resistance and down-pressure wear resistance greater than the leading insert.Type: GrantFiled: September 14, 2007Date of Patent: February 23, 2010Assignee: Kennametal Inc.Inventors: Timothy J. Diehl, Don C. Rowlett, Terry A. Manway, Duane E. Carson, Jr., Andrew G. Mayer, Aniruddha S. Marathe
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Publication number: 20100038955Abstract: A block and non-rotating wear sleeve for holding a cutting tool used with mining and construction is disclosed. A key is used to intersect with notches in the wear sleeve and block at a rear face of the wear sleeve and block to prevent rotational movement between the wear sleeve and block. Locating the key and notches at the rear face provides an easily manufactured anti-rotation means which is also sheltered from the most of the abrasion experienced by the block and wear sleeve.Type: ApplicationFiled: August 14, 2008Publication date: February 18, 2010Inventors: Donald E. Keller, Don C. Rowlett
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Publication number: 20090090524Abstract: A wear protection insert for an agricultural seeding tool having at least one angled edge on its lower base. The insert is made from wear resistant material shaped at an angle preferably ranging from about 135 to 175 degrees to form a doglegged corner component to improve the wear resistance of the soil slicing edge to the seeding tool.Type: ApplicationFiled: October 3, 2007Publication date: April 9, 2009Applicant: KENNAMETAL INC.Inventors: Duane E. Carson, JR., Don C. Rowlett, Rodger W. Mack
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Publication number: 20090071042Abstract: A grader blade includes a grader blade body that has a recess in a bottom edge, and a tri-grade insert assembly is received within the recess. The tri-grade insert assembly includes a leading insert, a mediate insert and a trailing insert. The leading insert has an impact wear resistance and fracture wear resistance greater than the mediate insert and the trailing insert. The trailing insert has an abrasion wear resistance and down-pressure wear resistance greater than the leading insert and the mediate insert. The mediate insert has an impact wear resistance and fracture wear resistance greater than the trailing insert and an abrasion wear resistance and down-pressure wear resistance greater than the leading insert.Type: ApplicationFiled: September 14, 2007Publication date: March 19, 2009Inventors: Timothy J. Diehl, Don C. Rowlett, Terry A. Manway, Duane E. Carson, JR., Andrew G. Mayer, Aniruddha S. Marathe
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Publication number: 20090067927Abstract: A road milling drum assembly that is for use with a road milling machine. The road milling drum includes a core portion carrying a first road planing bit assembly wherein the core portion detachably connects to the road milling machine. The first road planing bit assembly has a first milling width. The assembly further including one of the following components selected from the group of: (1) a protective cover that detachably connects to the core portion and the road milling machine; or (2) a milling extension segment carrying a second road planing bit assembly wherein the milling extension segment detachably connects to the core portion and the road milling machine. The second road planing bit assembly has a second milling width wherein the road milling drum has a milling width equal to the sum of the first milling width and the second milling width.Type: ApplicationFiled: September 10, 2007Publication date: March 12, 2009Inventors: Stephen P. Stiffler, Eric P. Helsel, Donald E. Keller, Don C. Rowlett
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Publication number: 20080149224Abstract: A stump cutter tooth held by a pocket member, which has first and second edge, and the pocket member being operatively attached to a driven wheel, which has opposite first and second side surfaces. The stump cutter tooth includes an elongate tooth body that has an axial forward end. A first hard region is at the axial forward end of the tooth body and defines at least one distinct cutting edge that has an orientation to engage the stump during operation. A second hard region is at the axial forward end of the tooth body and is distinct from the first hard region. The second hard region provides protection to at least a portion of the pocket member.Type: ApplicationFiled: May 29, 2007Publication date: June 26, 2008Inventors: Gary W. Kappel, Thomas R. Lyng, Cary D. Ritchey, Don C. Rowlett
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Publication number: 20080135659Abstract: A wear component for use in an impact crusher having a forward depression on the face of the wear component which is exposed to aggregate wear. Wear resistant inserts, for example cemented tungsten carbide inserts, are bonded within the forward depression to prevent rapid abrasion of the wear component. Joints are formed between wear resistant inserts and joints are also formed between wear resistant inserts and the wear component. Bonding material fills the joints to further secure the wear resistant inserts and to prevent crack propagation.Type: ApplicationFiled: December 12, 2006Publication date: June 12, 2008Inventors: Gary John Condon, Don C. Rowlett
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Patent number: 7090159Abstract: An impact crusher includes a center feed disk. The center feed disk includes a peripheral edge portion, a first face, an opposing, second face, a central bore extending through the first and second faces, and first and second countersunk pockets provided about the central bore in the first and second faces respectively. With this arrangement, a fastener having a shaft portion and a head portion can be inserted through the central bore to secure the center feed disk to a drive mechanism, with the head portion residing in the countersunk pocket. With this arrangement, once the first face portion becomes worn, the center feed disk can be removed, inverted and re-mounted such that the second face portion is exposed.Type: GrantFiled: March 23, 2004Date of Patent: August 15, 2006Assignee: Kennametal Inc.Inventors: Gary J. Condon, Don C. Rowlett
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Patent number: 6966270Abstract: A seeding tool for depositing seeds and fertilizer within a furrow including a knife opener having a liquid wing projecting from the side thereof for providing and maintaining spacing between the seeds and fertilizer. Preferably, the liquid wing is a tungsten carbide insert secured to the side of the knife opener, and has a wing shaped structure which is shaped and sized to space the fertilizer apart from the seeds, to protect the end of the tube from which fertilizer is dispensed, and to present a small leading surface which displaces the soil easily and presents minimal resistance. Preferably, the largest, side surface of the liquid wing insert is inclined toward the side of the knife opener from a widest lower, rear member adjacent the end of the fertilizer tube to a narrower top, front member near a leading end of the knife opener.Type: GrantFiled: September 19, 2003Date of Patent: November 22, 2005Assignees: Kennametal Inc., F. P. Bourgault Tillage Tools Ltd.Inventors: Don C. Rowlett, Linus I. Yeager, Dean M. Bigelow
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Patent number: 6745709Abstract: A ground engaging tip for a seed boot attachment for depositing a seed within a furrow. The tip including a conical shape member formed of three generally planar shape side surfaces wherein two of the side surfaces meet to form an inclined leading edge extending from a tip of the conical shape member; and at least one wear resistant insert. The insert is secured to the leading edge of the ground engaging tip and includes a generally elongated bar having a leading end, a trailing end and three connecting side surfaces, a first side, second side and third side. The first, second and third side surfaces form a bar having a generally triangular cross-section, wherein the leading end of the bar is angled.Type: GrantFiled: May 31, 2002Date of Patent: June 8, 2004Assignees: Kennametal Inc., GEN Manufacturing Ltd.Inventors: Don C. Rowlett, Henry J. Bergen, David H. Bergen
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Publication number: 20030221600Abstract: A ground engaging tip for a seed boot attachment for depositing a seed within a furrow. The tip including a conical shape member formed of three generally planar shape side surfaces wherein two of the side surfaces meet to form an inclined leading edge extending from a tip of the conical shape member; and at least one wear resistant insert. The insert is secured to the leading edge of the ground engaging tip and includes a generally elongated bar having a leading end, a trailing end and three connecting side surfaces, a first side, second side and third side. The first, second and third side surfaces form a bar having a generally triangular cross-section, wherein the leading end of the bar is angled.Type: ApplicationFiled: May 31, 2002Publication date: December 4, 2003Inventors: Don C. Rowlett, Henry J. Bergen, David H. Bergen
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Patent number: 6640731Abstract: A planting tool for depositing seed and/or fertilizer within a furrow including a soil opener and a seed boot attached to the soil opener. The seed boot includes a synclinal shape housing and at least one furrow forming wing that protrudes below the body of the seed boot. Each wing of the seed boot has at least one wear resistant leading insert positioned in front of and in juxtaposition to at least one wear resistant trailing insert that are each secured to at least a portion of the lower forward surface of the wing and that are each in juxtaposition to a portion of a furrow forming edge of the wing. The wear resistant leading insert and the wear resistant trailing insert have cobalt concentrations of from about 15 to 22 weight percent, and from about 8 to 14 weight percent, respectively.Type: GrantFiled: June 25, 2002Date of Patent: November 4, 2003Assignees: Kennametal Inc., Flexi-Coil Ltd.Inventors: Don C. Rowlett, Gerry S. Swab, James W. Henry, Dave Wiebe
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Patent number: 6468066Abstract: The present invention relates to a balling drum assembly including a wear resistant insert. The balling drum assembly includes an inclined rotary drum member having an inlet at its one end for receiving agglomerative material and at its other end an outlet for balls formed from the agglomerative material. At least one scraper blade assembly is operatively attached to the drum member parallel to the axis of rotation of the drum member. Each scraper blade assembly includes a blade support member and separate blade segments secured eccentrically to the blade support member with respect to the axis of rotation of the drum member. Each blade segment includes a wear resistant insert.Type: GrantFiled: April 4, 2001Date of Patent: October 22, 2002Assignee: Kennametal Inc.Inventor: Don C. Rowlett
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Publication number: 20020146476Abstract: The present invention relates to a balling drum assembly including a wear resistant insert. The balling drum assembly includes an inclined rotary drum member having an inlet at its one end for receiving agglomerative material and at its other end an outlet for balls formed from the agglomerative material. At least one scraper blade assembly is operatively attached to the drum member parallel to the axis of rotation of the drum member. Each scraper blade assembly includes a blade support member and separate blade segments secured eccentrically to the blade support member with respect to the axis of rotation of the drum member. Each blade segment includes a wear resistant insert.Type: ApplicationFiled: April 4, 2001Publication date: October 10, 2002Inventor: Don C. Rowlett
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Patent number: 6318279Abstract: A seed boot attachment for depositing a seed within a furrow including a synclinal shape housing extending to a forward point, furrow forming points extending rearwardly and downwardly from opposing side edges of a bottom surface of the housing, and at least one wear resistant insert secured to at least one of the side member of the furrow forming point, the insert comprising a truncated polyhedron, having a top face of a triangular shape, an opposing flat bottom face of a triangular shape and angled side faces extending between the peripheral edges of the top and bottom faces wherein at least two of the outer corners of the polyhedron are radiused.Type: GrantFiled: February 8, 2001Date of Patent: November 20, 2001Assignees: Kennametal Inc., Flexi-Coil Ltd.Inventors: Don C. Rowlett, Gerry S. Swab, James W. Henry
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Patent number: 5803194Abstract: A wear assembly for attachment to a protective sleeve for a drill bit sub wherein the wear assembly includes an elongate wear bar which has an interior surface for attachment to the protective sleeve. The wear bar also has an exterior surface. The wear bar further contains a slot opening at the exterior surface. The slot contains at least one hard insert affixed therein by brazing.Type: GrantFiled: November 19, 1996Date of Patent: September 8, 1998Assignee: Kennametal Inc.Inventor: Don C. Rowlett
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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: D588810Type: GrantFiled: June 26, 2007Date of Patent: March 24, 2009Assignee: Kennametal Inc.Inventors: Don C. Rowlett, Cary D. Ritchey