Patents Assigned to Tenryu Seikyo Kabushiki Kaisha
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Patent number: 7240597Abstract: A circular saw including an annular disk-shaped base adapted to be driven about an axis of rotation, a plurality of tip supports formed along the outer circumference of the base integrally therewith so that a gullet is defined between adjacent ones of the tip supports, a plurality of tip inserts respectively fixed to the tip supports, a plurality of openings formed through the base on substantially the same circumference of a circle so as to be equally spaced apart from each other in the circumferential direction of the base, and a plurality of wiper tips respectively fixed to wall surfaces defining the openings on the downstream side of a rotational direction of the base. Each wiper tip has a front surface formed as a concave surface in cross section.Type: GrantFiled: March 3, 2006Date of Patent: July 10, 2007Assignee: Tenryu Seikyo Kabushiki KaishaInventors: Hisao Sakai, Yusuke Miyachi
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Publication number: 20060107815Abstract: A disk cutter including an annular disk-shaped base adapted to be driven about an axis of rotation, a plurality of tip supports formed along the outer circumference of the base integrally therewith so that a gullet is defined between adjacent ones of the tip supports, a plurality of tip inserts respectively fixed to the tip supports, a plurality of outer slits formed at an outer circumferential portion of the base so as to be arranged at given intervals, each of the outer slits having an outer end opening to the gullet, and a plurality of intermediate slit pairs formed at a radially intermediate portion of the base so as to be arranged at the given intervals in such a manner that each of the intermediate slit pairs is located between adjacent ones of the outer slits. Each intermediate slit pair includes a substantially J-shaped first slit and a substantially inverted J-shaped second slit arranged in point symmetrical relationship with the first slit.Type: ApplicationFiled: February 9, 2005Publication date: May 25, 2006Applicant: TENRYU SEIKYO KABUSHIKI KAISHAInventor: Tanehiko Asada
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Patent number: 6994614Abstract: A metal-bonded grinding tool including a base and abrasive grains bonded to the base by means of a metal bond matrix containing a Cu alloy as a main component. A content of at least one of an alloy phase, a mixed phase, and an intermetallic compound of Zr and Ti in the metal bond matrix is in a range of 3.8 to 19.2 wt %.Type: GrantFiled: August 26, 2003Date of Patent: February 7, 2006Assignee: Tenryu Seikyo Kabushiki KaishaInventors: Sokichi Takemura, Tadao Ishikawa
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Publication number: 20050188792Abstract: A disk cutter including an annular disk-shaped base adapted to be driven about an axis of rotation, a plurality of tip supports formed along the outer circumference of the base integrally therewith so that a gullet is defined between adjacent ones of the tip supports, and a plurality of cutting tip inserts respectively fixed to the tip supports. Each of the cutting tip inserts has a pair of rakes inclined from the opposite side surfaces of each tip insert to the center of the thickness of each tip insert so as to define a first V-shaped groove, and a pair of flanks inclined from the opposite side surfaces of each tip insert to the center of the thickness of each tip insert so as to define a second V-shaped groove. The pair of rakes are formed in symmetry with respect to the center of the thickness of each tip insert, and the pair of flanks are also formed in symmetry with respect to the center of the thickness of each tip insert.Type: ApplicationFiled: May 3, 2005Publication date: September 1, 2005Applicant: Tenryu Seikyo Kabushiki KaishaInventor: Tanehiko Asada
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Publication number: 20050028664Abstract: A disk cutter including an annular disk-shaped base adapted to be driven about an axis of rotation, a plurality of tip supports formed along the outer circumference of the base integrally therewith so that a gullet is defined between adjacent ones of the tip supports, and a plurality of sets of tip inserts respectively fixed to the tip supports. Each set of tip inserts includes a pair of inclined tip inserts having oppositely inclined flanks with the same transverse clearance angle and oppositely inclined rakes with the same transverse rake angle. Each inclined tip insert has an inclined cutting edge such that a leading corner in respect of rotation of the base is lower in level than a trailing corner. The amount of sideward projection of the leading corner from the surface of the corresponding tip support is set larger by a given amount than that of the trailing corner.Type: ApplicationFiled: July 28, 2004Publication date: February 10, 2005Applicant: TENRYU SEIKYO KABUSHIKI KAISHAInventors: Noriyuki Terada, Takehide Iguchi
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Patent number: 6851418Abstract: A metal bonded drilling and boring tool which can prevent the separation of abrasive grains during drilling and boring to maintain a stable working performance for a long period of time without the need for tool exchange. The tool includes a rod-shaped body having a substantially semispherical front end portion and numerous abrasive grains bonded to an outer circumferential surface of the rod-shaped body at the front end portion and at a portion having a given length from the front end portion by a bond member formed primarily of copper alloy. The bond member contains a material selected from the group consisting of Ti, Al, and a mixture thereof. The copper alloy is selected from the group consisting of bronze containing 10 to 33 wt % of Sn, brass containing 5 to 20 wt % of Zn, and aluminum bronze containing 5 to 20 wt % of Al.Type: GrantFiled: December 13, 2001Date of Patent: February 8, 2005Assignee: Tenryu Seikyo Kabushiki KaishaInventors: Sokichi Takemura, Yoshikazu Kusachi, Akihiko Nakagawa
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Publication number: 20040065183Abstract: Disclosed herein is a disk cutter including an annular disk-shaped base adapted to be driven about an axis of rotation, a plurality of tip supports formed along the outer circumference of the base integrally therewith so that a gullet is defined between adjacent ones of the tip supports, and a plurality of cutting tip inserts respectively fixed to the tip supports. Each of the cutting tip inserts has a pair of rakes inclined from the opposite side surfaces of each tip insert to the center of the thickness of each tip insert so as to define a first V-shaped groove, and a pair of flanks inclined from the opposite side surfaces of each tip insert to the center of the thickness of each tip insert so as to define a second V-shaped groove. The pair of rakes are formed in symmetry with respect to the center of the thickness of each tip insert, and the pair of flanks are also formed in symmetry with respect to the center of the thickness of each tip insert.Type: ApplicationFiled: April 1, 2003Publication date: April 8, 2004Applicant: TENRYU SEIKYO KABUSHIKI KAISHAInventor: Tanehiko Asada
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Publication number: 20040043716Abstract: A metal-bonded grinding tool including a base and abrasive grains bonded to the base by means of a metal bond matrix containing a Cu alloy as a main component. A content of at least one of an alloy phase, a mixed phase, and an intermetallic compound of Zr and Ti in the metal bond matrix is in a range of 3.8 to 19.2 wt %.Type: ApplicationFiled: August 26, 2003Publication date: March 4, 2004Applicant: TENRYU SEIKYO KABUSHIKI KAISHAInventors: Sokichi Takemura, Tadao Ishikawa
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Publication number: 20040016125Abstract: A disk cutter including an annular disk-shaped base adapted to be driven about an axis of rotation; a plurality of tip supports formed along the outer circumference of the base integrally therewith so that a gullet is defined between adjacent ones of the tip supports; and a plurality of hardened cutter inserts respectively fixed to the tip supports. The base is imaginarily divided into a plurality of segments by radially extending lines. The hardened cutter inserts in each segment are arranged symmetrically with respect to a circumferential center line of the segment so that the pitches of the hardened cutter inserts on each side of the circumferential center line are stepwise increased in a direction from the circumferential center line toward the radially extending line on the same side.Type: ApplicationFiled: September 13, 2002Publication date: January 29, 2004Applicant: TENRYU SEIKYO KABUSHIKI KAISHAInventors: Tanehiko Asada, Hisao Sakai
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Patent number: 6620522Abstract: A metal bonded drilling tool which is improved in grinding performance with a long life and can drill a hole in a dry condition without the need for water. The metal bonded drilling tool includes a cylindrical body having an open front end portion, a shank integral with the cylindrical body and having a threaded hole for use in mounting the tool to a rotary tool, and numerous abrasive grains bonded to a front edge of the cylindrical body and to inner and outer cylindrical surfaces of the front end portion of the cylindrical body by a bond member formed primarily of copper alloy.Type: GrantFiled: September 26, 2001Date of Patent: September 16, 2003Assignee: Tenryu Seikyo Kabushiki KaishaInventors: Yoshikazu Kusachi, Akihiko Nakagawa
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Patent number: 6579332Abstract: A metal-bonded grinding tool including a base, and abrasive grains bonded to the base by a bond matrix containing Cu alloy as a main component. The bond matrix further contains a powder selected from the group consisting of Ti, Al, and a mixture thereof. An average grain protrusion is set to 30% or more of an average grain diameter, and an average grain spacing is set to 200% or more of the average grain diameter.Type: GrantFiled: July 7, 2000Date of Patent: June 17, 2003Assignee: Tenryu Seikyo Kabushiki KaishaInventors: Sokichi Takemura, Tadao Ishikawa
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Patent number: 6481321Abstract: A cutting apparatus includes a first annular member having a center eccentric from an axis of a rotating shaft and fixed to the rotating shaft. The cutting apparatus further includes a bearing with its inner race fixed to the first annular member, a disk cutter fixed relative to an outer race of the bearing, and a balancer fixed to the rotating shaft in a state being eccentric in the direction opposite to the eccentric direction of the first annular member.Type: GrantFiled: July 12, 2001Date of Patent: November 19, 2002Assignee: Tenryu Seikyo Kabushiki KaishaInventors: Sokichi Takemura, Katsuhito Iwata
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Publication number: 20020073813Abstract: A metal bonded drilling and boring tool which can prevent the separation of abrasive grains during drilling and boring to maintain a stable working performance for a long period of time without the need for tool exchange. The tool includes a rod-shaped body having a substantially semispherical front end portion and numerous abrasive grains bonded to an outer circumferential surface of the rod-shaped body at the front end portion and at a portion having a given length from the front end portion by a bond member formed primarily of copper alloy. The bond member contains a material selected from the group consisting of Ti, Al, and a mixture thereof. The copper alloy is selected from the group consisting of bronze containing 10 to 33 wt % of Sn, brass containing 5 to 20 wt % of Zn, and aluminum bronze containing 5 to 20 wt % of Al.Type: ApplicationFiled: December 13, 2001Publication date: June 20, 2002Applicant: TENRYU SEIKYO KABUSHIKI KAISHAInventors: Sokichi Takemura, Yoshikazu Kusachi, Akihiko Nakagawa
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Publication number: 20020035890Abstract: A metal bonded drilling tool which is improved in grinding performance with a long life and can drill a hole in a dry condition without the need for water. The metal bonded drilling tool includes a cylindrical body having an open front end portion, a shank integral with the cylindrical body and having a threaded hole for use in mounting the tool to a rotary tool, and numerous abrasive grains bonded to a front edge of the cylindrical body and to inner and outer cylindrical surfaces of the front end portion of the cylindrical body by a bond member formed primarily of copper alloy.Type: ApplicationFiled: September 26, 2001Publication date: March 28, 2002Applicant: Tenryu Seikyo Kabushiki KaishaInventors: Yoshikazu Kusachi, Akihiko Nakagawa
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Publication number: 20020005102Abstract: A cutting apparatus includes a first annular member having a center eccentric from an axis of a rotating shaft and fixed to the rotating shaft. The cutting apparatus further includes a bearing with its inner race fixed to the first annular member, a disk cutter fixed relative to an outer race of the bearing, and a balancer fixed to the rotating shaft in a state being eccentric in the direction opposite to the eccentric direction of the first annular member.Type: ApplicationFiled: July 12, 2001Publication date: January 17, 2002Applicant: TENRYU SEIKYO KABUSHIKI KAISHAInventors: Sokichi Takemura, Katsuhito Iwata
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Patent number: 6158323Abstract: A disk cutter has an annular disk-shaped base which is composed of a first disk and a second disk spot-welded at a plurality of portions to the first disk. Each of the first and second disks has a plurality of holes formed therein. The holes are circumferentially spaced at an equal interval with the holes of the first and second disks being alternately arranged. The base has a peripheral edge with a plurality of tool receiving recesses formed therein. A plurality of hardened cutting tool inserts are fixed to the base at the recesses.Type: GrantFiled: October 15, 1998Date of Patent: December 12, 2000Assignee: Tenryu Seikyo Kabushiki KaishaInventor: Tanehiko Asada
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Patent number: 5794503Abstract: A disk-type cutting tool having a plurality of hardened inserts that are received in recesses formed in the periphery of a base disk. Each insert has a shank portion that is received in the recess and which defines a shoulder that is in abutting engagement with one side of the base disk. This provides a mechanical interlock and location for brazing operation, and also increases the amount of surface area for brazing to provide a more rigid assembly.Type: GrantFiled: June 26, 1996Date of Patent: August 18, 1998Assignee: Tenryu Seikyo Kabushiki KaishaInventor: Tanehiko Asada
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Patent number: D485478Type: GrantFiled: August 30, 2002Date of Patent: January 20, 2004Assignee: Tenryu Seikyo Kabushiki KaishaInventor: Hisao Sakai
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Patent number: D387261Type: GrantFiled: August 12, 1996Date of Patent: December 9, 1997Assignee: Tenryu Seikyo Kabushiki KaishaInventor: Tanehiko Asada