Patents by Inventor Toshiyuki Kosuge
Toshiyuki Kosuge 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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Publication number: 20240060555Abstract: [Means for Solution] A gear member includes a tooth having a tooth flank whose profile is an involute curve, wherein in a cross-section of the tooth perpendicular to a face width direction, the tooth has a depression, near a top land, hollowed in the tooth flank relative to the involute curve.Type: ApplicationFiled: September 25, 2020Publication date: February 22, 2024Inventors: Reiko OKUNO, Shinichi HIRONO, Toshiyuki KOSUGE, Heisuke KOBAYASHI, Shinya KURIHARA, Katsuhiko YAZAMA
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Publication number: 20150307800Abstract: There is provided a sliding member that has sufficient wear resistance and good adhesion to a base formed of a sintered body. The sliding member includes a surface layer formed of a crosslinked fluoropolymer and a base that adheres closely to the surface layer. The base is a sintered body having a full density ratio in the range of 0.75 to 0.96 and is formed of a material having higher thermal conductivity than a fluoropolymer. The surface layer has a thickness in the range of 1 to 300 ?m.Type: ApplicationFiled: October 24, 2013Publication date: October 29, 2015Applicants: SUMITOMO ELECTRIC SINTERED ALLOY, LTD., SUMITOMO ELECTRIC FINE POLYMER, INC.Inventors: Kentaro YOSHIDA, Toshiyuki KOSUGE, Kazuaki IKEDA, Yasunori NAGAOKA
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Patent number: 9091263Abstract: In an internal gear pump 9, a diameter of a base circle is set to A mm, a radius of a rolling circle is set to b mm, a diameter of a locus circle is set to C mm, and an amount of eccentricity is set to e mm. A trochoidal curve T is drawn by rolling the rolling circle along the base circle without slipping and by using a locus of a fixed point distant from a center of the rolling circle by e. A tooth profile of an inner rotor 2 having n teeth is formed based on an envelope of a group of the locus circles each having a center on the trochoidal curve T. A pump rotor 1 is formed by combining the inner rotor with an outer rotor having (n+1) teeth. A tooth-profile curve of the inner rotor satisfies the following expression (1). Because K<1 is satisfied, cusps s are not formed at opposite edges of each addendum of the inner rotor 2.Type: GrantFiled: December 26, 2012Date of Patent: July 28, 2015Assignee: SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Masato Uozumi, Toshiyuki Kosuge
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Patent number: 9004889Abstract: An internal gear pump includes an inner rotor having n teeth and an outer rotor having (n+1) teeth. A tooth profile of the inner rotor is an envelope of a group of locus circles (13) each having a diameter C and having a center on a trochoidal curve (T), the trochoidal curve being drawn along a locus of a fixation point, which is located distant from a center of a rolling circle (12) by e, when the rolling circle (12) rolls along a base circle (11) without sliding. A tooth profile of the outer rotor is an envelope of a group of tooth-profile curves of a formation inner rotor, the envelope being obtained by first drawing the formation inner rotor in which a diameter of the locus circle (13) is equal to C? determined from expression (C?t), revolving a center (OI) of the formation inner rotor by one lap along a circle (S) having a diameter (2e) and centered on a center (OO) of the outer rotor, and rotating the formation inner rotor 1/n times during the revolution.Type: GrantFiled: October 16, 2012Date of Patent: April 14, 2015Assignee: Sumitomo Electric Sintered Alloy Ltd.Inventors: Masato Uozumi, Toshiyuki Kosuge
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Publication number: 20140199198Abstract: An internal gear pump includes an inner rotor having n teeth and an outer rotor having (n+1) teeth. A tooth profile of the inner rotor is an envelope of a group of locus circles (13) each having a diameter C and having a center on a trochoidal curve (T), the trochoidal curve being drawn along a locus of a fixation point, which is located distant from a center of a rolling circle (12) by e, when the rolling circle (12) rolls along a base circle (11) without sliding. A tooth profile of the outer rotor is an envelope of a group of tooth-profile curves of a formation inner rotor, the envelope being obtained by first drawing the formation inner rotor in which a diameter of the locus circle (13) is equal to C? determined from expression (C?t), revolving a center (OI) of the formation inner rotor by one lap along a circle (S) having a diameter (2e) and centered on a center (OO) of the outer rotor, and rotating the formation inner rotor 1/n times during the revolution.Type: ApplicationFiled: October 16, 2012Publication date: July 17, 2014Applicant: SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Masato Uozumi, Toshiyuki Kosuge
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Publication number: 20140112816Abstract: In an internal gear pump 9, a diameter of a base circle is set to A mm, a radius of a rolling circle is set to b mm, a diameter of a locus circle is set to C mm, and an amount of eccentricity is set to e mm. A trochoidal curve T is drawn by rolling the rolling circle along the base circle without slipping and by using a locus of a fixed point distant from a center of the rolling circle by e. A tooth profile of an inner rotor 2 having n teeth is formed based on an envelope of a group of the locus circles each having a center on the trochoidal curve T. A pump rotor 1 is formed by combining the inner rotor with an outer rotor having (n+1) teeth. A tooth-profile curve of the inner rotor satisfies the following expression (1). Because K<1 is satisfied, cusps s are not formed at opposite edges of each addendum of the inner rotor 2.Type: ApplicationFiled: December 26, 2012Publication date: April 24, 2014Inventors: Masato Uozumi, Toshiyuki Kosuge
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Patent number: 6402488Abstract: An oil pump that can be reduced in weight and is excellent in wear resistance and easy to manufacture is provided. The oil pump includes an oil pump housing formed of aluminum alloy, and an inner rotor and an outer rotor that slide along the oil pump housing with contact kept therebetween to suck and discharge oil. Composite layers including porous metallic bodies are arranged at parts of the oil pump housing that contact the inner rotor and the outer rotor. Pores of the porous metallic bodies are impregnated with the aluminum alloy constituting the oil pump housing.Type: GrantFiled: January 26, 2001Date of Patent: June 11, 2002Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kenichi Watanabe, Keizo Harada, Koichi Sogabe, Toshiyuki Kosuge
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Publication number: 20010016173Abstract: An oil pump that can be reduced in weight and is excellent in wear resistance and easy to manufacture is provided. The oil pump includes an oil pump housing formed of aluminum alloy, and an inner rotor and an outer rotor that slide along the oil pump housing with contact kept therebetween to suck and discharge oil. Composite layers including porous metallic bodies are arranged at parts of the oil pump housing that contact the inner rotor and the outer rotor. Pores of the porous metallic bodies are impregnated with the aluminum alloy constituting the oil pump housing.Type: ApplicationFiled: January 26, 2001Publication date: August 23, 2001Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kenichi Watanabe, Keizo Harada, Koichi Sogabe, Toshiyuki Kosuge
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Patent number: 6244843Abstract: An internal gear pump which improves the mechanical efficiency and the life and reduces noises by eliminating non-uniformity of the gaps between teeth. In the internal gear pump wherein the tooth spaces of the outer gear and the tooth tips of the inner gear form an epicycloid and the tooth tips of the outer gear and the tooth spaces of the inner gear form a hypocycloid, these cycloids are formed by four circles that roll on the pitch circle of each gear such that the gap between teeth in a region where the outer and inner gears mesh most deeply with each other is substantially equal to the gap between teeth in a region where the depth of mesh between the outer and inner gears are the shallowest.Type: GrantFiled: May 9, 2000Date of Patent: June 12, 2001Assignee: Sumitomo Electric Industries, Ltd.Inventor: Toshiyuki Kosuge