Patents by Inventor Takanori Nagata
Takanori Nagata 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: 11808018Abstract: A bucket tooth adapter for a bucket includes a mounting portion and a nose portion extending from the mounting portion. The mounting portion includes a first body portion and a wide portion. The wide portion is wider than the first body portion and is provided between the first body portion and the nose portion.Type: GrantFiled: September 9, 2020Date of Patent: November 7, 2023Assignee: KOMATSU LTD.Inventors: Takanori Nagata, Daijirou Tanaka, Yudai Furudate, Tatsuo Aira, Monta Kondou
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Patent number: 11661726Abstract: A tooth attachment structure for a bucket includes a tooth, a pin member, and a lock member. The tooth includes a guide groove provided on an inner surface of the tooth and a pin hole provided in the guide groove. The pin member is disposed in the pin hole. The lock member is disposed in the guide groove. The lock member locks the pin member. The lock member engages the pin member by sliding toward the pin member.Type: GrantFiled: September 9, 2020Date of Patent: May 30, 2023Assignee: KOMATSU LTD.Inventors: Takanori Nagata, Daijirou Tanaka, Yudai Furudate, Tatsuo Aira, Monta Kondou
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Patent number: 11598074Abstract: A tooth mounting structure for a bucket includes a tooth adapter and a tooth. The tooth adapter includes a mounting portion mounted to the bucket and a nose portion extending from the mounting portion. The tooth includes an internal space for inserting the nose portion. The nose portion includes a rectangular tip portion, a rectangular base end portion and an octagonal connecting portion. An inner surface of the tooth is formed along an outer surface of the nose portion.Type: GrantFiled: September 9, 2020Date of Patent: March 7, 2023Assignee: KOMATSU LTD.Inventors: Takanori Nagata, Daijirou Tanaka, Yudai Furudate, Tatsuo Aira, Monta Kondou
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Publication number: 20220298758Abstract: A tooth attachment structure for a bucket includes a tooth, a pin member, and a lock member. The tooth includes a guide groove provided on an inner surface of the tooth and a pin hole provided in the guide groove. The pin member is disposed in the pin hole. The lock member is disposed in the guide groove. The lock member locks the pin member. The lock member engages the pin member by sliding toward the pin member.Type: ApplicationFiled: September 9, 2020Publication date: September 22, 2022Inventors: Takanori NAGATA, Daijirou TANAKA, Yudai FURUDATE, Tatsuo AIRA, Monta KONDOU
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Publication number: 20220290412Abstract: A bucket tooth adapter for a bucket includes a mounting portion and a nose portion extending from the mounting portion. The mounting portion includes a first body portion and a wide portion. The wide portion is wider than the first body portion and is provided between the first body portion and the nose portion.Type: ApplicationFiled: September 9, 2020Publication date: September 15, 2022Inventors: Takanori NAGATA, Daijirou TANAKA, Yudai FURUDATE, Tatsuo AIRA, Monta KONDOU
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Publication number: 20220275608Abstract: A tooth mounting structure for a bucket includes a tooth adapter and a tooth. The tooth adapter includes a mounting portion mounted to the bucket and a nose portion extending from the mounting portion. The tooth includes an internal space for inserting the nose portion. The nose portion includes a rectangular tip portion, a rectangular base end portion and an octagonal connecting portion. An inner surface of the tooth is formed along an outer surface of the nose portion.Type: ApplicationFiled: September 9, 2020Publication date: September 1, 2022Inventors: Takanori NAGATA, Daijirou TANAKA, Yudai FURUDATE, Tatsuo AIRA, Monta KONDOU
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Patent number: 10745891Abstract: The tooth adapter partly inserted into a cavity formed in a tooth to hold the tooth with respect to a bucket body includes a connection portion including a proximal end, which is an end of the tooth adapter connected to the bucket body, and an insertion portion including a distal end, which is an end of the tooth adapter inserted into the cavity. The insertion portion includes a base, and a high-hardness portion formed in a region including a surface of the insertion portion, the high-hardness portion being higher in hardness than the base.Type: GrantFiled: February 27, 2018Date of Patent: August 18, 2020Assignees: KOMATSU LTD., HENSLEY INDUSTRIES, INC.Inventors: Shohei Ikurumi, Dan Yumoto, Stanley Ignacio, Takanori Nagata
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Publication number: 20190264425Abstract: The tooth adapter partly inserted into a cavity formed in a tooth to hold the tooth with respect to a bucket body includes a connection portion including a proximal end, which is an end of the tooth adapter connected to the bucket body, and an insertion portion including a distal end, which is an end of the tooth adapter inserted into the cavity. The insertion portion includes a base, and a high-hardness portion formed in a region including a surface of the insertion portion, the high-hardness portion being higher in hardness than the base.Type: ApplicationFiled: February 27, 2018Publication date: August 29, 2019Applicants: KOMATSU LTD., HENSLEY INDUSTRIES, INC.Inventors: Shohei IKURUMI, Dan YUMOTO, Stanley IGNACIO, Takanori NAGATA
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Patent number: 9009996Abstract: An excavating tooth includes a body and an abrasion-resistant layer. The abrasion-resistant layer has hardness higher than the body. The body includes a tip end face, a first face, a second face, a pair of first slope faces, and a pair of second slope faces. The abrasion-resistant layer includes a first abrasion-resistant layer section and a second abrasion-resistant layer section. The first abrasion-resistant layer section is formed on the tip end face. The second abrasion-resistant layer section is formed respectively on the pair of first slope faces and the pair of second slope faces. Thereby, it is possible to obtain an excavating tooth and a body for the excavating tooth capable of keeping a penetration force of a blade edge high in penetrating into an excavation subject.Type: GrantFiled: January 29, 2013Date of Patent: April 21, 2015Assignee: Komatsu Ltd.Inventors: Eiji Amada, Takanori Nagata, Kenichi Tanaka, Daijirou Itou
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Patent number: 8997383Abstract: A bucket tooth assembly is mounted to an adapter provided to a distal end part of a bucket of construction equipment. The bucket assembly includes a bucket tooth and a latching member. The bucket tooth has a cavity for inserting the adapter and a through-hole that is provided to the side face and communicates through to the adapter when the bucket tooth has been mounted to the adapter. The through-hole has a center axis. The latching member is fitted inside the through-hole and having a rotational axis disposed along a direction of the center axis and a bottom part provided to an end on an adapter side in an axial direction. The latching member is rotated to switch between a first state in which the bottom part is held inside the through-hole and a second state in which the bottom part protrudes toward a concave portion on the adapter side.Type: GrantFiled: April 26, 2012Date of Patent: April 7, 2015Assignee: Komatsu Ltd.Inventors: Daijirou Itou, Takanori Nagata, Eiji Amada, Tsuyoshi Yoshida
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Patent number: 8851826Abstract: A bottom surface part of a bucket includes first and second curved surface parts. The second curved surface part is positioned closer to a back surface part than the first curved surface part. A second curvature radius of the second curved surface part is shorter than a first curvature radius of the first curved surface part. The center of the first curvature radius is positioned to the outside of a main bucket body when viewed from the side. In a horizontal state, the first curved surface part is arranged along or above a reference curved surface when viewed from the side. A connecting part between the first curved surface part and the second curved surface part is positioned more towards a lip part than the portion of the bottom surface part that is positioned lowest in the bottom surface part in the horizontal state when viewed from the side.Type: GrantFiled: October 19, 2010Date of Patent: October 7, 2014Assignee: Komatsu Ltd.Inventors: Takanori Nagata, Kenichi Higuchi, Masakuni Ueda, Kouzou Ishida, Daijirou Itou
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Patent number: 8832975Abstract: A bucket tooth for a construction vehicle includes a through-hole formed in a side wall part and passing through to a cavity. The through-hole has on a cavity side a rotating body hole having a shape of a truncated and rotated cone that remains after removing a large diameter side portion obtained by cutting diagonally to a rotational axis of the truncated and rotated cone with a large diameter side of the truncated and rotated cone being disposed on the cavity side, and with the rotational axis of the truncated and rotated cone being inclined outwardly toward the distal end portion of the bucket tooth from the cavity along a width direction of the bucket tooth.Type: GrantFiled: May 7, 2012Date of Patent: September 16, 2014Assignee: Komatsu Ltd.Inventors: Daijirou Itou, Takanori Nagata, Eiji Amada, Tsuyoshi Yoshida
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Publication number: 20140215867Abstract: An excavating tooth includes a body and an abrasion-resistant layer. The abrasion-resistant layer has hardness higher than the body. The body includes a tip end face, a first face, a second face, a pair of first slope faces, and a pair of second slope faces. The abrasion-resistant layer includes a first abrasion-resistant layer section and a second abrasion-resistant layer section. The first abrasion-resistant layer section is formed on the tip end face. The second abrasion-resistant layer section is formed respectively on the pair of first slope faces and the pair of second slope faces. Thereby, it is possible to obtain an excavating tooth and a body for the excavating tooth capable of keeping a penetration force of a blade edge high in penetrating into an excavation subject.Type: ApplicationFiled: January 29, 2013Publication date: August 7, 2014Applicant: KOMATSU LTD.Inventors: Eiji Amada, Takanori Nagata, Kenichi Tanaka, Daijirou Itou
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Patent number: 8679207Abstract: Disclosed is a wear-resistant particle which can be substantially uniformly dispersed in a molten pool. Specifically disclosed is a wear-resistant particle (13) which is dispersed in a matrix metal for improving wear resistance thereof. The wear-resistant particle is characterized by being composed of a material containing a first hard material and a second hard material while having a particle diameter of 0.2-9 mm. The wear-resistant particle is further characterized in that the material consists of 60-96% by volume of a carbide and the balance of a metal.Type: GrantFiled: March 30, 2007Date of Patent: March 25, 2014Assignees: Komatsu Ltd., Japan New Metals Co., Ltd.Inventors: Masaharu Amano, Takanori Nagata, Mitsushi Inoshita, Kenji Iwamoto
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Patent number: 8495826Abstract: A work implement includes a ground engaging tool with a first through-hole, an adapter with a second through-hole, a retaining pin, a metal bushing and a metal retainer. The retaining pin is inserted into the first and second through-holes disposed in a state in which the ground engaging tool is in contact with the adapter. The retaining pin is inserted in an inside of an cylindrical member of the bushing, which is disposed at an end portion of the retaining pin inside the first through-hole. The metal retainer prevents the bushing from coming loose from the retaining pin by sandwiching the bushing between the metal retainer and the adapter at the end of the retaining pin. The bushing is disposed in a state that allows movement in an axial direction of the retaining pin between the adapter and the retainer on an outer peripheral face of the retaining pin.Type: GrantFiled: March 30, 2011Date of Patent: July 30, 2013Assignee: Komatsu Ltd.Inventors: Daijirou Itou, Kouzou Ishida, Takanori Nagata, Keita Mutou
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Publication number: 20130152432Abstract: A bucket tooth for a construction vehicle includes a through-hole formed in a side wall part and passing through to a cavity. The through-hole has on a cavity side a rotating body hole having a shape of a truncated and rotated cone that remains after removing a large diameter side portion obtained by cutting diagonally to a rotational axis of the truncated and rotated cone with a large diameter side of the truncated and rotated cone being disposed on the cavity side, and with the rotational axis of the truncated and rotated cone being inclined outwardly toward the distal end portion of the bucket tooth from the cavity along a width direction of the bucket tooth.Type: ApplicationFiled: May 7, 2012Publication date: June 20, 2013Applicant: Komatsu Ltd.Inventors: Daijirou Itou, Takanori Nagata, Eiji Amada, Tsuyoshi Yoshida
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Publication number: 20130152433Abstract: A bucket tooth assembly is mounted to an adapter provided to a distal end part of a bucket of construction equipment. The bucket assembly includes a bucket tooth and a latching member. The bucket tooth has a cavity for inserting the adapter and a through-hole that is provided to the side face and communicates through to the adapter when the bucket tooth has been mounted to the adapter. The through-hole has a center axis. The latching member is fitted inside the through-hole and having a rotational axis disposed along a direction of the center axis and a bottom part provided to an end on an adapter side in an axial direction. The latching member is rotated to switch between a first state in which the bottom part is held inside the through-hole and a second state in which the bottom part protrudes toward a concave portion on the adapter side.Type: ApplicationFiled: April 26, 2012Publication date: June 20, 2013Inventors: Daijirou Itou, Takanori Nagata, Eiji Amada, Tsuyoshi Yoshida
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Publication number: 20120301258Abstract: A bottom surface part of a bucket includes first and second curved surface parts. The second curved surface part is positioned closer to a back surface part than the first curved surface part. A second curvature radius of the second curved surface part is shorter than a first curvature radius of the first curved surface part. The center of the first curvature radius is positioned to the outside of a main bucket body when viewed from the side. In a horizontal state, the first curved surface part is arranged along or above a reference curved surface when viewed from the side. A connecting part between the first curved surface part and the second curved surface part is positioned more towards a lip part than the portion of the bottom surface part that is positioned lowest in the bottom surface part in the horizontal state when viewed from the side.Type: ApplicationFiled: October 19, 2010Publication date: November 29, 2012Applicant: KOMATSU LTD.Inventors: Takanori Nagata, Kenichi Higuchi, Masakuni Ueda, Kouzou Ishida, Daijirou Itou
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Publication number: 20120222336Abstract: A work implement includes a ground engaging tool with a first through-hole, an adapter with a second through-hole, a retaining pin, a metal bushing and a metal retainer. The retaining pin is inserted into the first and second through-holes disposed in a state in which the ground engaging tool is in contact with the adapter. The retaining pin is inserted in an inside of an cylindrical member of the bushing, which is disposed at an end portion of the retaining pin inside the first through-hole. The metal retainer prevents the bushing from coming loose from the retaining pin by sandwiching the bushing between the metal retainer and the adapter at the end of the retaining pin. The bushing is disposed in a state that allows movement in an axial direction of the retaining pin between the adapter and the retainer on an outer peripheral face of the retaining pin.Type: ApplicationFiled: March 30, 2011Publication date: September 6, 2012Applicant: KOMATSU LTD.Inventors: Daijirou Itou, Kouzou Ishida, Takanori Nagata, Keita Mutou
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Publication number: 20090019783Abstract: Disclosed is a wear-resistant particle which can be substantially uniformly dispersed in a molten pool. Specifically disclosed is a wear-resistant particle (13) which is dispersed in a matrix metal for improving wear resistance thereof. The wear-resistant particle is characterized by being composed of a material containing a first hard material and a second hard material while having a particle diameter of 0.2-9 mm. The wear-resistant particle is further characterized in that the material consists of 60-96% by volume of a carbide and the balance of a metal.Type: ApplicationFiled: March 30, 2007Publication date: January 22, 2009Inventors: Masaharu Amano, Takanori Nagata, Mitsushi Inoshita, Kenji Iwamoto