Patents by Inventor Sadayuki Akaki
Sadayuki Akaki 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: 7950880Abstract: A cutting tool that includes an elongate body that has a forward end and a rearward end. The elongate body has a fluted portion that beginning near and extends in a rearward direction from the forward end. The fluted portion has a flute that defines a cutting edge. The flute presents a concave cutting face wherein the concave cutting face is defined by a first radius. The flute further presents a concave core surface adjacent to the concave cutting face wherein the concave core surface is defined by a second radius. The flute presents a convex heel surface adjacent to the concave core surface wherein the convex heel surface is defined by a fourth radius.Type: GrantFiled: October 18, 2006Date of Patent: May 31, 2011Assignees: Kennametal Inc., Yamawa Manufacturing LimitedInventors: Willard E. Henderer, Stephen M. George, Steven R. Burns, Sadayuki Akaki
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Patent number: 7665934Abstract: A cutting tap that has an elongate tap body with a fluted section at the axial forward end thereof wherein the fluted section includes a chamfered fluted section and a finishing fluted section. Each cutting thread in the chamfered fluted section has a cutting face disposed at a cutting face angle that becomes more negative the more axially rearward the cutting thread is from the axial forward end of the chamfered fluted section. Each cutting thread in the finishing fluted section has a cutting face disposed at a finishing cutting face angle that is essentially equal. The finishing cutting face angle is more negative than the cutting face angle for the cutting thread at the axial rearward termination of the chamfered fluted section.Type: GrantFiled: October 18, 2006Date of Patent: February 23, 2010Assignees: Kennametal Inc., Yamawa Manufacturing LtdInventors: Willard E. Henderer, Vladimir Volokh, Sadayuki Akaki
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Patent number: 7468001Abstract: A high-speed forming tap (1) for cutting and forming a female screw by cutting edges (E) of a screw portion (2) fed in synchronous with the rotation of a machine tool. The high-speed forming tap is characterized in that chamfers (CF) are provided at a bevel lead (2a) of the screw part (2). The chamfers (CF) start from the cutting edge (E) and are provided along ridgelines (R) between a crest face (2e) and flanks, or a following flank (2c) and a leading flank (2d). This structure enables the shape of the edges of the tap leading portion to be stably maintained and high-speed, smooth female screw cutting with high accuracy, and provides a tap with long life.Type: GrantFiled: March 2, 2004Date of Patent: December 23, 2008Assignees: Yamawa Mfg. Co., Ltd., Kennametal Inc.Inventors: Sadayuki Akaki, Masao Mitsui, Willard E. Henderer
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Publication number: 20080095587Abstract: A cutting tap that has an elongate tap body with a fluted section at the axial forward end thereof wherein the fluted section includes a chamfered fluted section and a finishing fluted section. Each cutting thread in the chamfered fluted section has a cutting face disposed at a cutting face angle that becomes more negative the more axially rearward the cutting thread is from the axial forward end of the chamfered fluted section. Each cutting thread in the finishing fluted section has a cutting face disposed at a finishing cutting face angle that is essentially equal. The finishing cutting face angle is more negative than the cutting face angle for the cutting thread at the axial rearward termination of the chamfered fluted section.Type: ApplicationFiled: October 18, 2006Publication date: April 24, 2008Inventors: Willard E. Henderer, Vladimir Volokh, Sadayuki Akaki
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Publication number: 20080095588Abstract: A cutting tool that includes an elongate body that has a forward end and a rearward end. The elongate body has a fluted portion that beginning near and extends in a rearward direction from the forward end. The fluted portion has a flute that defines a cutting edge. The flute presents a concave cutting face wherein the concave cutting face is defined by a first radius. The flute further presents a concave core surface adjacent to the concave cutting face wherein the concave core surface is defined by a second radius. The flute presents a convex heel surface adjacent to the concave core surface wherein the convex heel surface is defined by a fourth radius.Type: ApplicationFiled: October 18, 2006Publication date: April 24, 2008Inventors: Willard E. Henderer, Stephen M. George, Steven R. Burns, Sadayuki Akaki
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Patent number: 7207867Abstract: A precision cemented carbide threading tap is designed for use in precision tool holders in synchronous high speed tapping. The precision tap includes a fully cylindrical shank without the aid of squares, flats or other notches. The precision tap further includes a threaded body portion and a threaded cutting chamfer portion. The threaded body portion and the threaded cutting chamfer portion of the precision tap are concentric to the cylindrical shank of the tap within a runout of 10 microns. The precision cemented carbide threading tap improves the accuracy, life and speed by which internal screw threads are produced.Type: GrantFiled: April 18, 2005Date of Patent: April 24, 2007Assignees: Kennametal Inc., Yamawa Mfg. Co., Ltd.Inventors: Willard E. Henderer, Sadayuki Akaki
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Patent number: 7147939Abstract: A coated carbide tap comprises a substrate consisting of tungsten carbide cemented with 12 to 16% by weight cobalt with additions of small amounts of transition metal carbides added to restrain grain growth, and may also contain low levels of impurities that might be picked up during processing. The substrate is coated with a layer of metal nitrides, carbides, carbonitrides, borides and/or oxides, the metal being chosen from one or more of the following: aluminum, silicon and the transition metals from Groups IVa, Va, and VIa of the Periodic Chart. The coating may comprise a monolayer and/or alternating layers optionally with varying chemical composition.Type: GrantFiled: February 27, 2003Date of Patent: December 12, 2006Assignees: Kennametal Inc., Yamawa Manufacturing Ltd.Inventors: Willard E. Henderer, Anakkavur T. Santhanam, Sadayuki Akaki
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Patent number: 7147413Abstract: A precision cemented carbide threading tap is designed for use in precision tool holders in synchronous high speed tapping. The precision tap includes a fully cylindrical shank without the aid of squares, flats or other notches. The precision tap further includes a threaded body portion and a threaded cutting chamfer portion. The threaded body portion and the threaded cutting chamfer portion of the precision tap are concentric to the cylindrical shank of the tap within a runout of 10 microns. The precision cemented carbide threading tap improves the accuracy, life and speed by which internal screw threads are produced.Type: GrantFiled: February 27, 2003Date of Patent: December 12, 2006Assignees: Kennametal Inc., Yamawa Mfg. Co., Ltd.Inventors: Willard E. Henderer, Sadayuki Akaki
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Publication number: 20060127193Abstract: A high-speed forming tap (1) for cutting and forming a female screw by cutting edges (E) of a screw portion (2) fed in synchronous with the rotation of a machine tool. The high-speed forming tap is characterized in that chamfers (CF) are provided at a bevel lead (2a) of the screw part (2). The chamfers (CF) start from the cutting edge (E) and are provided along ridgelines (R) between a crest face (2e) and flanks, or a following flank (2c) and a leading flank (2d). This structure enables the shape of the edges of the tap leading portion to be stably maintained and high-speed, smooth female screw cutting with high accuracy, and provides a tap with long life.Type: ApplicationFiled: March 2, 2004Publication date: June 15, 2006Applicants: Yamawa MFG. CO., LTD, Kennamental Inc.Inventors: Sadayuki Akaki, Masao Mitsui, Willard Henderer
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Publication number: 20050187026Abstract: A precision cemented carbide threading tap is designed for use in precision tool holders in synchronous high speed tapping. The precision tap includes a fully cylindrical shank without the aid of squares, flats or other notches. The precision tap further includes a threaded body portion and a threaded cutting chamfer portion. The threaded body portion and the threaded cutting chamfer portion of the precision tap are concentric to the cylindrical shank of the tap within a runout of 10 microns. The precision cemented carbide threading tap improves the accuracy, life and speed by which internal screw threads are produced.Type: ApplicationFiled: April 18, 2005Publication date: August 25, 2005Inventors: Willard Henderer, Sadayuki Akaki
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Publication number: 20040170482Abstract: A precision cemented carbide threading tap is designed for use in precision tool holders in synchronous high speed tapping. The precision tap includes a fully cylindrical shank without the aid of squares, flats or other notches. The precision tap further includes a threaded body portion and a threaded cutting chamfer portion. The threaded body portion and the threaded cutting chamfer portion of the precision tap are concentric to the cylindrical shank of the tap within a runout of 10 microns. The precision cemented carbide threading tap improves the accuracy, life and speed by which internal screw threads are produced.Type: ApplicationFiled: February 27, 2003Publication date: September 2, 2004Inventors: Willard E. Henderer, Sadayuki Akaki
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Publication number: 20040170872Abstract: A coated carbide tap comprises a substrate consisting of tungsten carbide cemented with 12 to 16% by weight cobalt with additions of small amounts of transition metal carbides added to restrain grain growth, and may also contain low levels of impurities that might be picked up during processing. The substrate is coated with a layer of metal nitrides, carbides, carbonitrides, borides and/or oxides, the metal being chosen from one or more of the following: aluminum, silicon and the transition metals from Groups IVa, Va, and VIa of the Periodic Chart. The coating may comprise a monolayer and/or alternating layers optionally with varying chemical composition.Type: ApplicationFiled: February 27, 2003Publication date: September 2, 2004Inventors: Willard E. Henderer, Anakkavur T. Santhanam, Sadayuki Akaki