Patents by Inventor Hideharu Takahashi
Hideharu Takahashi 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: 11969803Abstract: According to one implementation, a drill includes the first cutting edges, the second cutting edges and a deflection reducer. The first cutting edges drill a prepared hole to a workpiece. The first cutting edges are formed in a tip side of the drill. The first point angle and each first relief angle of the first cutting edges continuously or intermittently decrease from the tip side toward a rear end side of the drill. The second cutting edges finish the prepared hole. The second cutting edges are formed at positions away in the rear end side from the first cutting edges. The second cutting edges have the second relief angles at a maximum diameter position. The deflection reducer reduces deflection of the second cutting edges by being inserted into the prepared hole. The deflection reducer is formed between the first cutting edges and the second cutting edges.Type: GrantFiled: January 6, 2022Date of Patent: April 30, 2024Assignee: SUBARU CORPORATIONInventors: Masao Watanabe, Ryohei Ono, Tatsuo Nakahata, Hiroyuki Sugawara, Shinya Matsuo, Hideharu Takahashi
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Publication number: 20230420821Abstract: According to one embodiment, an high-frequency input coupler installed between a waveguide and an acceleration cavity to input high-frequency waves from the waveguide to the acceleration cavity, a coaxial waveguide conversion unit includes a high-frequency transmission window structure connection unit that connects the high-frequency transmission window structure and an inner conductor connection unit that connects an inner conductor which includes an inner conductor support on a side of the inner conductor connection unit, and the high-frequency input coupler includes an electrically connectable and deformable buffer between the inner conductor support and the inner conductor connection unit.Type: ApplicationFiled: September 7, 2023Publication date: December 28, 2023Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventor: Hideharu TAKAHASHI
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Publication number: 20230173440Abstract: The mixing nozzle has a throat section, a diffuser section, a gas nozzle section, a first liquid suction port, a liquid nozzle section, a second liquid suction port, a baffle plate, and a jetting port. The first liquid suction port liquidly absorbs the solution in the water storage pool from a side of the gas nozzle section toward the gas nozzle tip. The liquid nozzle section extends to the downstream side of the gas nozzle section with intervening the first liquid suction port. The second liquid suction port liquidly absorbs the solution in the water storage pool from a side of the liquid nozzle section toward the liquid nozzle tip. The baffle plate is provided such that the mixed flow mixed in the diffuser section collides in front of a downstream end of the diffuser section, and divides and reverses the mixed flow.Type: ApplicationFiled: March 26, 2021Publication date: June 8, 2023Inventors: Tadashi NARABAYASHI, Hiroshige KIKURA, Hideharu TAKAHASHI, Katsumasa ARAOKA, Koji ENDO, Tomohiko YOSHII
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Publication number: 20220234121Abstract: According to one implementation, a drill includes the first cutting edges, the second cutting edges and a deflection reducer. The first cutting edges drill a prepared hole to a workpiece. The first cutting edges are formed in a tip side of the drill. The first point angle and each first relief angle of the first cutting edges continuously or intermittently decrease from the tip side toward a rear end side of the drill. The second cutting edges finish the prepared hole. The second cutting edges are formed at positions away in the rear end side from the first cutting edges. The second cutting edges have the second relief angles at a maximum diameter position. The deflection reducer reduces deflection of the second cutting edges by being inserted into the prepared hole. The deflection reducer is formed between the first cutting edges and the second cutting edges.Type: ApplicationFiled: January 6, 2022Publication date: July 28, 2022Applicant: SUBARU CORPORATIONInventors: Masao WATANABE, Ryohei ONO, Tatsuo NAKAHATA, Hiroyuki SUGAWARA, Shinya MATSUO, Hideharu TAKAHASHI
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Publication number: 20220063004Abstract: According to one implementation, a drill includes the first cutting edges, the second cutting edges and a deflection reducer. The first cutting edges drill a prepared hole to a workpiece. The first cutting edges are formed in a tip side of the drill. The first point angle and each first relief angle of the first cutting edges continuously or intermittently decrease from the tip side toward a rear end side of the drill. The second cutting edges finish the prepared hole. The second cutting edges are formed at positions away in the rear end side from the first cutting edges. The second cutting edges have the second relief angles at a maximum diameter position. The deflection reducer reduces deflection of the second cutting edges. The deflection reducer is formed between the first cutting edges and the second cutting edges. The deflection reducer is inserted into the prepared hole.Type: ApplicationFiled: July 29, 2021Publication date: March 3, 2022Applicant: SUBARU CORPORATIONInventors: Masao WATANABE, Hiroyuki SUGAWARA, Tatsuo NAKAHATA, Ryohei ONO, Shinya MATSUO, Hideharu TAKAHASHI
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Patent number: 10252386Abstract: A tool feeding mechanism for a tool driving device includes a cylinder mechanism, a positioning mechanism, and a holding mechanism. The cylinder mechanism moves a tool rotation driving device to hold and rotate a tool, in a tool axis direction on an exterior of a cylinder tube using power of a piston. The positioning mechanism is connected to the cylinder tube side of the cylinder mechanism either directly or indirectly in order to position the cylinder mechanism relative to a workpiece. The holding mechanism holds the tool rotation driving device such that the power of the piston in the cylinder mechanism is transmitted to the tool rotation driving device.Type: GrantFiled: August 20, 2013Date of Patent: April 9, 2019Assignee: SUBARU CORPORATIONInventors: Manabu Saito, Tatsuo Nakahata, Hideharu Takahashi, Toshio Nishino, Masao Watanabe
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Patent number: 9981322Abstract: A drill includes a cutting edge. The cutting edge has a point angle which is continuously decreased from a center-position point angle A (herein, 0°<A<180°) at a center position to a maximum-diameter-position point angle of 0° at a maximum diameter position. The cutting edge has a relief angle which is continuously decreased from the center position to the maximum diameter position. The cutting edge of the drill has a relief angle at the maximum diameter position. Hence, the cutting edge also serves as a cutting edge for reaming. The ridgeline and relief face of the cutting edge have no corner, thereby providing good wear resistance.Type: GrantFiled: October 6, 2015Date of Patent: May 29, 2018Assignee: SUBARU CORPORATIONInventors: Tatsuo Nakahata, Manabu Saito, Masanori Hosoi, Hideharu Takahashi
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Patent number: 9827617Abstract: According to one implementation, a drill has at least one cutting edge. A projected shape of a passing area of a ridgeline of the at least one cutting edge when the at least one cutting edge is rotated around a tool axis becomes a line-symmetric and discontinuous line along a parabola, two parabolas, an ellipse or two ellipses. The projected shape is drawn on a projection plane parallel to the tool axis.Type: GrantFiled: May 15, 2015Date of Patent: November 28, 2017Assignee: SUBARU CORPORATIONInventors: Manabu Saito, Tatsuo Nakahata, Hideharu Takahashi, Masao Watanabe, Toshio Nishino
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Patent number: 9669472Abstract: A drilling apparatus includes: a drill rotatable about a center axis and capable of advancing and retracting along the axis; and a pressing unit for pressing a work in an advancing direction of the drill. The drilling apparatus advances the drill while rotating the drill about the center axis to form a hole in the work, in a state in which the work is pressed by the pressing unit. A pressing force applied on the work by the pressing unit is set to a predetermined pressing force based on machining reaction applied to the drill from the work during drilling and the pressing force causing deformation of the work in the advancing direction of the drill. The predetermined pressing force can suppress deformation of the work and displacement of the drill due to the machining reaction. The machining reaction and the pressing force are calculated beforehand in a drilling test.Type: GrantFiled: May 23, 2014Date of Patent: June 6, 2017Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Hideaki Miyajima, Takashi Murakami, Hideharu Takahashi, Tatsuo Nakahata
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Patent number: 9656328Abstract: Disclosed is a cutting tool, including: a cutting edge including a coating from a rake face to a flank face, and has a relief angle of not less than 15 degrees, a material of the coating having a higher wear resistance than a base material of the cutting edge, and during cutting of a work, an edge of the coating on the rake face at a top of the cutting edge is worn by friction with the work; with a progress of a wear inward in a radial direction, an edge of the coating on the flank face at the top of the cutting edge is removed by friction with the work to expose the base material thereunder; and the exposed base material is worn by friction with the work to retract the flank face inward in the radial direction.Type: GrantFiled: March 27, 2012Date of Patent: May 23, 2017Assignees: FUJI JUKOGYO KABUSHIKI KAISHA, MAKOTOLOY CO., LTD.Inventors: Manabu Saito, Tatsuo Nakahata, Hideharu Takahashi, Junji Tsuchiya, Masao Watanabe, Eiji Hashimoto, Hirofumi Higashiwaki
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Publication number: 20160023281Abstract: A drill includes a cutting edge. The cutting edge has a point angle which is continuously decreased from a center-position point angle A (herein, 0°<A<180°) at a center position to a maximum-diameter-position point angle of 0° at a maximum diameter position. The cutting edge has a relief angle which is continuously decreased from the center position to the maximum diameter position. The cutting edge of the drill has a relief angle at the maximum diameter position. Hence, the cutting edge also serves as a cutting edge for reaming. The ridgeline and relief face of the cutting edge have no corner, thereby providing good wear resistance.Type: ApplicationFiled: October 6, 2015Publication date: January 28, 2016Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Tatsuo NAKAHATA, Manabu SAITO, Masanori HOSOI, Hideharu TAKAHASHI
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Publication number: 20150336182Abstract: According to one implementation, a drill has at least one cutting edge. A projected shape of a passing area of a ridgeline of the at least one cutting edge when the at least one cutting edge is rotated around a tool axis becomes a line-symmetric and discontinuous line along a parabola, two parabolas, an ellipse or two ellipses. The projected shape is drawn on a projection plane parallel to the tool axis.Type: ApplicationFiled: May 15, 2015Publication date: November 26, 2015Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Manabu SAITO, Tatsuo NAKAHATA, Hideharu TAKAHASHI, Masao WATANABE, Toshio NISHINO
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Patent number: 9180531Abstract: A drill includes a cutting edge. The cutting edge has a point angle which is continuously decreased from a center-position point angle A (herein, 0°<A<180°) at a center position to a maximum-diameter-position point angle of 0° at a maximum diameter position. The cutting edge has a relief angle which is continuously decreased from the center position to the maximum diameter position. The cutting edge of the drill has a relief angle at the maximum diameter position. Hence, the cutting edge also serves as a cutting edge for reaming. The ridgeline and relief face of the cutting edge have no corner, thereby providing good wear resistance.Type: GrantFiled: December 23, 2008Date of Patent: November 10, 2015Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Tatsuo Nakahata, Manabu Saito, Masanori Hosoi, Hideharu Takahashi
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Patent number: 9168593Abstract: A drill includes a cutting edge having a ridgeline. The ridgeline has a part of an ellipse and a straight line. It is assumed that the coordinates of a separation point of an ellipse portion from a straight line portion are (x0, y0). The straight line is a tangent to the ellipse at the separation point. It is assumed that a1 is an area from a tip end of the drill to x0, a2 is an area from x0 to the origin of the ellipse, and a3 is a negative area, along the x-axis. The ridgeline of the cutting edge is formed straight along the tangent in the area a1, and is formed along the ellipse in the area a2. A margin is formed in the area a3 continuously from a relief face of the cutting edge.Type: GrantFiled: December 24, 2009Date of Patent: October 27, 2015Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Manabu Saito, Tatsuo Nakahata, Hideharu Takahashi
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Patent number: 9009937Abstract: The object of the invention is to provide a sleeve removal tool that is able to easily remove a sleeve from a tap without damaging the sleeve. The sleeve removal tool has a first fastening member and a second fastening member. The first fastening member has a first contact surface and inner screw section, and is formed in a cylindrical shape. The first contact surface comes in contact with the flange of the sleeve all around one ring shaped surface. An inner screw section is provided such that it protrudes in the axial direction from the first contact surface. The second fastening member has a second contact surface and outer screw section, and is formed in a cylindrical shape. The first contact surface comes in contact all around the other ring shaped surface of the flange.Type: GrantFiled: December 12, 2011Date of Patent: April 21, 2015Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Manabu Saito, Hideharu Takahashi, Tatsuo Nakahata
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Publication number: 20140348603Abstract: A drilling apparatus includes: a drill rotatable about a center axis and capable of advancing and retracting along the axis; and a pressing unit for pressing a work in an advancing direction of the drill. The drilling apparatus advances the drill while rotating the drill about the center axis to form a hole in the work, in a state in which the work is pressed by the pressing unit. A pressing force applied on the work by the pressing unit is set to a predetermined pressing force based on machining reaction applied to the drill from the work during drilling and the pressing force causing deformation of the work in the advancing direction of the drill. The predetermined pressing force can suppress deformation of the work and displacement of the drill due to the machining reaction. The machining reaction and the pressing force are calculated beforehand in a drilling test.Type: ApplicationFiled: May 23, 2014Publication date: November 27, 2014Applicant: Fuji Jukogyo Kabushiki KaishaInventors: Hideaki MIYAJIMA, Takashi MURAKAMI, Hideharu TAKAHASHI, Tatsuo NAKAHATA
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Patent number: 8876442Abstract: The object of the invention is to stably spray cutting fluid in a good mist form, when cutting fluid and air are supplied from the surrounding area and cutting fluid is sprayed in a mist form from the tip end section of a rotary cutting tool. The rotary cutter of the present invention sequentially feeds a mixture of cutting fluid and air through a supply pipe 4, first supply path b in a cover 3, second supply paths c, d in a chuck 2, a hollow center cavity (front throttle chamber d, throttle 24a, and rear throttle chamber e) in the chuck, and a third supply path g in a rotary cutting tool 1.Type: GrantFiled: September 24, 2010Date of Patent: November 4, 2014Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Manabu Saito, Tatsuo Nakahata, Hideharu Takahashi
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Patent number: 8734067Abstract: A drill includes a pair of main cutting edges extending from a distal portion of the drill to a position close to a proximal end of the drill to entirely define a two-edge configuration, and a pair of auxiliary cutting edges extending between positions at the distal and proximal sides of a maximum diameter position to partly define a four-edge configuration. A ridgeline of each auxiliary cutting edge is located within an angle smaller than 90° from a ridgeline of the corresponding main cutting edge toward the rear in a rotation direction of the drill. The point angle of the auxiliary cutting edges increases at a higher rate than the point angle of the main cutting edges in a predetermined range from the maximum diameter position toward a distal end of the drill.Type: GrantFiled: March 9, 2010Date of Patent: May 27, 2014Assignees: Fuji Jukogyo Kabushiki Kaisha, Makotoloy Co., Ltd.Inventors: Manabu Saito, Tatsuo Nakahata, Hideharu Takahashi, Junji Tsuchiya, Eiji Hashimoto, Hirofumi Higashiwaki
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Publication number: 20140054053Abstract: A tool feeding mechanism for a tool driving device includes a cylinder mechanism, a positioning mechanism, and a holding mechanism. The cylinder mechanism moves a tool rotation driving device to hold and rotate a tool, in a tool axis direction on an exterior of a cylinder tube using power of a piston. The positioning mechanism is connected to the cylinder tube side of the cylinder mechanism either directly or indirectly in order to position the cylinder mechanism relative to a workpiece. The holding mechanism holds the tool rotation driving device such that the power of the piston in the cylinder mechanism is transmitted to the tool rotation driving device.Type: ApplicationFiled: August 20, 2013Publication date: February 27, 2014Applicant: Fuji Jukogyo Kabushiki KaishaInventors: Manabu SAITO, Tatsuo NAKAHATA, Hideharu TAKAHASHI, Toshio NISHINO, Masao WATANABE
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Patent number: 8479613Abstract: This fastening tool supports a key wrench such that it cannot rotate at a location where a hexagonal hole on the tip end part comes in contact with a nut, so that even though the key wrench is pressed backward as a pin is screwed into the nut, a key wrench holder remains in a state of contact with the nut. After the pin has been screwed into the nut, the nut is twisted off at a weak section. The further the pin is screwed into the nut, the key wrench holder supports the key wrench at a location closer to the pin, which keeps the amount of torsional deformation of the tip end part of the wrench small, and thus makes it possible to securely engage with the pin, and in the final state of the fastening work, it is possible to completely twist off the twist-off type nut, which requires a large torque.Type: GrantFiled: April 20, 2011Date of Patent: July 9, 2013Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Manabu Saito, Tatsuo Nakahata, Hideharu Takahashi