Patents by Inventor Masahiko Igarashi
Masahiko Igarashi 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: 8497940Abstract: A method and apparatus for communicating within a wireless microphone system having a plurality of audio channels. The method includes the steps of dividing a small block of radio frequency spectrum associated with a single television broadcast channel into a plurality of at least 20 contiguous subchannels that are also contiguous with the boundaries of the television broadcast channel where each of the subchannels is less than 75 kHz and transmitting an audio signal from a microphone transmitter on one the plurality of subchannels through a transmitter with a radio frequency isolator or other means for suppressing intermodulation energy coupled to an antenna, the radio frequency isolator having a bandwidth no larger than any one of the plurality of divided subchannels; and receiving the audio signal through a microphone receiver.Type: GrantFiled: November 14, 2011Date of Patent: July 30, 2013Assignee: Audio-Technica U.S., Inc.Inventors: Bob Green, Masahiko Igarashi, Tadashi Kikutani, Yoshihiko Naito
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Publication number: 20120120313Abstract: A method and apparatus for communicating within a wireless microphone system having a plurality of audio channels. The method includes the steps of dividing a small block of radio frequency spectrum associated with a single television broadcast channel into a plurality of at least 20 contiguous subchannels that are also contiguous with the boundaries of the television broadcast channel where each of the subchannels is less than 75 kHz and transmitting an audio signal from a microphone transmitter on one the plurality of subchannels through a transmitter with a radio frequency isolator or other means for suppressing intermodulation energy coupled to an antenna, the radio frequency isolator having a bandwidth no larger than any one of the plurality of divided subchannels; and receiving the audio signal through a microphone receiver.Type: ApplicationFiled: November 14, 2011Publication date: May 17, 2012Applicant: Audio-Technica U.S. Inc.Inventors: Robert Green, Masahiko Igarashi, Tadashi Kikutani, Yoshihiko Naito
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Patent number: 8043023Abstract: A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part having a plurality of linear spline teeth is formed at the end part of the shaft and a hub tooth part having a plurality of linear spline teeth fitted to the end part of the shaft is formed in the inner peripheral surface of a shaft hole in the hub. A first step part is formed by swelling the shaft tooth part toward the hub tooth part from a point (P1) horizontally moved from the center point (P0) of the shaft tooth part to a shaft shank side. On the ridge part side of the hub tooth part, a point is set at a position offset from the point (P1) horizontally to the opposite side of the shaft shank, and a second step part increased in a diameter from the point (P2) in the radial outer direction is formed.Type: GrantFiled: March 8, 2004Date of Patent: October 25, 2011Assignee: Honda Motor Co., Ltd.Inventors: Masahiko Igarashi, Takeshi Mochizuki, Masanori Kosugi
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Patent number: 7972078Abstract: A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part comprises a ridge part formed of a crowning with varied tooth thickness, and a hub tooth part comprises a ridge part having tooth thickness formed in a specified linear shape and having an inner diameter varying from the end part thereof to a shaft shank side. A first step part swelling to the hub tooth part is formed in the bottom part of the shaft tooth part, and a second step part recessed in a direction opposite to the shaft tooth part is formed in the ridge part of the hub tooth part. The start point of the first step part and the start point of the second step part are set at positions offset by a specified distance from each other.Type: GrantFiled: August 3, 2004Date of Patent: July 5, 2011Assignee: Honda Motor Co., Ltd.Inventors: Masahiko Igarashi, Takeshi Mochizuki, Masanori Kosugi
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Patent number: 7908897Abstract: A spline rolling tool including a plurality of forming teeth that are to bite into a cylindrical workpiece so as to roll splines in the workpiece. Each of the forming teeth has an incomplete toothed region in which a crest of each forming tooth is removed such that an upper end of each forming tooth in the incomplete toothed region is defined by an incomplete-toothed region surface that includes a curved surface portion, a flat surface portion and a slant surface portion. The incomplete-toothed region surface is defined at its periphery by a chamfered edge that has a surface roughness of not larger than about 3.2 ?m. Also disclosed is a process of manufacturing the spline rolling tool, which includes a chamfering step of forming the chamfered edge by using a wire brush having abrasive grains that are fixed to bristles of the wire brush.Type: GrantFiled: February 28, 2006Date of Patent: March 22, 2011Assignees: Honda Motor Co., Ltd., OSG CorporationInventors: Masahiko Igarashi, Hideo Watanabe, Nobuyoshi Asaga, Satoshi Komuro, Takeshi Mochizuki, Daisuke Sakurai, Manabu Igusa, Yoshihiro Umebayashi, Masahiro Oiwake
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Publication number: 20090186709Abstract: A shaft tooth section has a mountain section of a twisted shape crossing the axis of a shaft (mountain section of hub tooth section). The hub tooth section has the mountain section of a linear shape having a constant tooth thickness, and the inner diameter of the mountain section varies from an end section toward the shaft shank side. A first step expanding toward the hub tooth section side is formed in a valley section of the shaft tooth section. A second step recessed toward the opposite side of the shaft tooth section is formed in the mountain section of the hub tooth section. The start point (P1) of the first step and the start point (P2) of the second step are set at the positions separated by a predetermined distance (L4).Type: ApplicationFiled: March 24, 2006Publication date: July 23, 2009Inventors: Masahiko Igarashi, Takeshi Mochizuki, Masanori Kosugi
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Publication number: 20090110589Abstract: A steel material of 85 to 95 HRB exhibiting a ratio of area occupied by ferrite of 30% or higher, which steel material comprises given amounts of C, Si, Mn, S, Ti, Cr, Al and B and the balance of iron and unavoidable impurities, is subjected to induction hardening. After the hardening, the surface of the steel material exhibits an Hv value of 640 to 730. When t refers to the effective hardening depth, namely, the distance from the surface to a region exhibiting an Hv value of 392 and r refers to the radius of the steel material, the hardened layer ratio, t/r, is 0.4 or higher.Type: ApplicationFiled: October 11, 2006Publication date: April 30, 2009Inventors: Yoshimi Usui, Yutaka Sato, Masahiko Igarashi, Wataru Yanagita, Hideo Watanabe, Satoru Nakamyo
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Publication number: 20080152424Abstract: A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part comprises a ridge part formed of a crowning with varied tooth thickness, and a hub tooth part comprises a ridge part having tooth thickness formed in a specified linear shape and having an inner diameter varying from the end part thereof to a shaft shank side. A first step part swelling to the hub tooth part is formed in the bottom part of the shaft tooth part, and a second step part recessed in a direction opposite to the shaft tooth part is formed in the ridge part of the hub tooth part. The start point of the first step part and the start point of the second step part are set at positions offset by a specified distance from each other.Type: ApplicationFiled: August 3, 2004Publication date: June 26, 2008Inventors: Masahiko Igarashi, Takeshi Mochizuki, Masanori Kosugi
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Publication number: 20080104817Abstract: A spline rolling tool including a plurality of forming teeth that are to bite into a cylindrical workpiece so as to roll splines in the workpiece. Each of the forming teeth has an incomplete toothed region in which a crest of each forming tooth is removed such that an upper end of each forming tooth in the incomplete toothed region is defined by an incomplete-toothed region surface that includes a curved surface portion, a flat surface portion and a slant surface portion. The incomplete-toothed region surface is defined at its periphery by a chamfered edge that has a surface roughness of not larger than about 3.2 ?m. Also disclosed is a process of manufacturing the spline rolling tool, which includes a chamfering step of forming the chamfered edge by using a wire brush having abrasive grains that are fixed to bristles of the wire brush.Type: ApplicationFiled: February 28, 2006Publication date: May 8, 2008Applicants: Honda Motor Co., Ltd., OSG CORPORATIONInventors: Masahiko Igarashi, Hideo Watanabe, Nobuyoshi Asaga, Satoshi Komuro, Takeshi Mochizuki, Daisuke Sakurai, Manabu Igusa, Yoshihiro Umebayashi, Masahiro Oiwake
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Publication number: 20060291954Abstract: A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part having a plurality of linear spline teeth is formed at the end part of the shaft and a hub tooth part having a plurality of linear spline teeth fitted to the end part of the shaft is formed in the inner peripheral surface of a shaft hole in the hub. A first step part is formed by swelling the shaft tooth part toward the hub tooth part from a point (P1) horizontally moved from the center point (P0) of the shaft tooth part to a shaft shank side. On the ridge part side of the hub tooth part, a point is set at a position offset from the point (P1) horizontally to the opposite side of the shaft shank, and a second step part increased in a diameter from the point (P2) in the radial outer direction is formed.Type: ApplicationFiled: March 8, 2004Publication date: December 28, 2006Applicant: HONDA MOTOR CO., LTD.Inventors: Masahiko Igarashi, Takeshi Mochizuki, Masanori Kosugi
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Patent number: 4839627Abstract: A variable resistor including terminal leads punched out of a metal plate the end portions of which are arranged to be positioned accurately onto corresponding collector or conductor elements disposed on a base respectively by setting the metal plate at a fixed position, filler elements filling a gap extending between the collector element and the conductor elements and a gap extending between the conductor elements and which prevent an outflow of synthetic resin into the center of a housing during the process of molding the housing and a parallel gap electrode provided with a pair of parallel electrodes which are provided on an unplated surface of the end portions of the lead terminals during the process of welding the terminal leads onto the corresponding collector and the conductive elements respectively.Type: GrantFiled: December 31, 1987Date of Patent: June 13, 1989Assignee: Copal Electronics Co., Ltd.Inventors: Atsushi Okazaki, Masahiko Igarashi, Tsuneo Horie
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Patent number: 4712084Abstract: A potentiometer has a case, a housing, a base and a rotor rotatably arranged in the chamber of housing. The housing is provided with a pair of projections on both side walls thereof and two pair of corner projections at four corners thereof respectively while the case has a pair of bent long legs in which holes are defined to receive the side wall projections of the housing and a pair of bent short walls are arranged to cover the top of the housing. The case may be pushed down upon the housing with the pair of bent long legs thereof being slid down into vertical grooves arranged between the corner projections of the housing until the side wall projections of the housing are slidingly snapped into the holes of the case and thus, the case and the housing may be assembled in one operation.Type: GrantFiled: March 19, 1986Date of Patent: December 8, 1987Assignee: Copal Electronics Co., Ltd.Inventors: Atsushi Okazaki, Masahiko Igarashi, Tsuneo Horie
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Patent number: 4525523Abstract: There is proposed a negative-working photoresist coating composition of an improved resolution, which comprises a cyclized polyisoprene having a weight-average molecular weight of 10,000 to 100,000 and a molecular weight distribution of not more than 1.9, an organic solvent of the cyclized polyisoprene, and a bisazido compound as a crosslinking agent.Type: GrantFiled: August 26, 1983Date of Patent: June 25, 1985Assignees: Kanto Chemical Co., Inc., Tokyo Shibaura Denki Kabushiki KaishaInventors: Hatsuo Nakamura, Tiharu Kato, Toshio Yonezawa, Shigeo Koguchi, Kiyoto Mori, Masahiko Igarashi
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Patent number: D597075Type: GrantFiled: July 18, 2008Date of Patent: July 28, 2009Assignee: Kabushiki Kaisha Audio-TechnicaInventors: Koichi Irii, Masahiko Igarashi