Patents by Inventor Kenichi Kajiwara
Kenichi Kajiwara 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: 8439142Abstract: Air flowing through a secondary air inducting conduit of a motorcycle is effectively cooled to enhance combustion efficiency of exhaust gas in a catalyzer. A part of the secondary air inducting conduit is exposed to a space behind a front wheel and in front of an engine, and thus acts as a secondary air cooling conduit section for cooling down secondary air flowing through the secondary air inducting conduit.Type: GrantFiled: December 5, 2007Date of Patent: May 14, 2013Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Kenichi Kajiwara, Kazuya Nishizawa, Takayuki Gouke, Takeshi Igarashi
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Patent number: 7648337Abstract: A multistage pump according to the present invention has a plurality of intermediate casings (2) formed by press-forming a steel plate. The intermediate casing has a cylindrical side portion (21), a stage flat portion (23) with which an axial end face of an adjacent intermediate casing is held in contact, a stage side portion (24) extending axially from the stage flat portion, and a bottom portion (25) extending radially inward from the stage side portion. A relief plate (30) having an outer circumferential end face which is held in contact with an inner surface of a cylindrical side portion of the adjacent intermediate casing is attached to the bottom portion of the intermediate casing. The relief plate, the stage side portion, the stage flat portion, and the inner surface of the cylindrical side portion of the adjacent intermediate casing form a space in which an O-ring (40) is fitted.Type: GrantFiled: January 21, 2003Date of Patent: January 19, 2010Assignee: Ebara CorporationInventors: Sou Kuroiwa, Kenichi Kajiwara, Shoji Ito, Kikuichi Mori, Aki Ishikawa, Tetsutaro Fujiwara
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Publication number: 20080135317Abstract: Air flowing through a secondary air inducting conduit of a motorcycle is effectively cooled to enhance combustion efficiency of exhaust gas in a catalyzer. A part of the secondary air inducting conduit is exposed to a space behind a front wheel and in front of an engine, and thus acts as a secondary air cooling conduit section for cooling down secondary air flowing through the secondary air inducting conduit.Type: ApplicationFiled: December 5, 2007Publication date: June 12, 2008Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Kenichi KAJIWARA, Kazuya NISHIZAWA, Takayuki GOUKE, Takeshi IGARASHI
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Publication number: 20080019831Abstract: A centrifugal pump includes at least one impeller (11) fixed to a main shaft (10) and at least one casing which houses the impeller and is formed through press working of sheet metal such as a steel plate. The centrifugal pump further includes a casing cover configured to seal an open end of the casing hermetically, and a shaft seal device (12) provided at a portion where the main shaft passes through the casing cover. The casing cover has a thick member (6) made of castings, and a thin corrosion-resistant lining member (40) which is tightly fixed to the thick member.Type: ApplicationFiled: November 12, 2004Publication date: January 24, 2008Inventors: Kenichi Kajiwara, Junya Kawabata, Sou Kuroiwa, Tetsutaro Fujiwara, Shoji Ito
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Patent number: 7247001Abstract: An impeller (1) according to the present invention has a disk-like main plate (10), a blade (20) joined to the main plate, and a side plate (30) having a suction port. A boss hole (12) is formed in a central portion of the main plate for attaching a boss which engages with a pump shaft to the boss hole. A step portion (14) is formed around the boss hole, which is formed in the main plate, by drawing.Type: GrantFiled: January 21, 2003Date of Patent: July 24, 2007Assignee: Ebara CorporationInventors: Kenichi Kajiwara, Sou Kuroiwa, Kikuichi Mori, Koichi Kunimasa
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Patent number: 6922348Abstract: According to the present invention, in a water supply apparatus which converts output power of a solar cell with an inverter to drive a motor pump for pumping up water, a DC brushless motor having no sensor for detecting a position of a rotatable shaft is used as a motor for driving the pump.Type: GrantFiled: July 5, 2001Date of Patent: July 26, 2005Assignee: Ebara CorporationInventors: Kaoru Nakajima, Kenichi Kajiwara, Masahito Kawai, Masahiko Kishi, Nobuhiro Higaki, Yukio Murai
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Publication number: 20050147505Abstract: A multistage pump according to the present invention has a plurality of intermediate casings (2) formed by press-forming a steel plate. The intermediate casing has a cylindrical side portion (21), a stage flat portion (23) with which an axial end face of an adjacent intermediate casing is held in contact, a stage side portion (24) extending axially from the stage flat portion, and a bottom portion (25) extending radially inward from the stage side portion. A relief plate (30) having an outer circumferential end face which is held in contact with an inner surface of a cylindrical side portion of the adjacent intermediate casing is attached to the bottom portion of the intermediate casing. The relief plate, the stage side portion, the stage flat portion, and the inner surface of the cylindrical side portion of the adjacent intermediate casing form a space in which an O-ring (40) is fitted.Type: ApplicationFiled: January 21, 2003Publication date: July 7, 2005Inventors: Sou Kuroiwa, Kenichi Kajiwara, Shoji Ito, Kikuichi Mori, Aki Ishikawa, Tetsutaro Fujiwara
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Patent number: 6872051Abstract: The present invention relates to a fastener and a fastening method for joining together two or more members including at least one complicate-shaped plate. A fastener comprises a cap nut (20) having a main body and a thin-walled portion (24) projecting from the main body, and a bolt (30) screwed into the cap nut (20). The cap nut (20) is fixed to a plate-like member (12) by inserting the thin-walled portion (24) into a through-hole (12a) of the plate-like member (12) and caulking the thin-walled portion (24).Type: GrantFiled: December 28, 2001Date of Patent: March 29, 2005Assignee: Ebara CorporationInventors: Yoshiaki Miyazaki, Hiroshi Uchida, Kenichi Kajiwara, Kikuichi Mori, Chitoshi Morita
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Publication number: 20050002789Abstract: An impeller (1) according to the present invention has a disk-like main plate (10), a blade (20) joined to the main plate, and a side plate (30) having a suction port. A boss hole (12) is formed in a central portion of the main plate for attaching a boss which engages with a pump shaft to the boss hole. A step portion (14) is formed around the boss hole, which is formed in the main plate, by drawing.Type: ApplicationFiled: January 21, 2003Publication date: January 6, 2005Inventors: Kenichi Kajiwara, Sou Kuroiwa, Kikuichi Mori, Koichi Kunimasa
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Publication number: 20040076532Abstract: The present invention relates to a canned motor which can be manufactured more easily to lower a manufacturing cast, and a canned motor pump having such canned motor. The canned motor comprises a stator (12), a rotor (16) provided in the stator, and a main shaft (14) for supporting the rotor. The main shaft comprises a hollow pipe (50), and plug members (52, 54) fitted into both ends of the hollow pipe, and the plug members have respective through-holes (52a, 54a).Type: ApplicationFiled: December 4, 2003Publication date: April 22, 2004Inventors: Yoshiaki Miyazaki, Hiroshi Uchida, Kenichi Kajiwara, Kozo Matake, Kaname Kurita
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Publication number: 20040047729Abstract: The present invention relates to a fastener and a fastening method for joining together two or more members including at least one complicate-shaped plate. A fastener comprises a cap nut (20) having a main body and a thin-walled portion (24) projecting from the main body, and a bolt (30) screwed into the cap nut (20). The cap nut (20) is fixed to a plate-like member (12) by inserting the thin-walled portion (24) into a through-hole (12a) of the plate-like member (12) and caulking the thin-walled portion (24).Type: ApplicationFiled: June 27, 2003Publication date: March 11, 2004Inventors: Yoshiaki Miyazaki, Hiroshi Uchida, Kenichi Kajiwara, Kikuichi Mori, Chitoshi Morita
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Patent number: 6655914Abstract: A casing cover is used in separating a motor assembly and a pump assembly from each other in a pump device. The casing cover has a cylindrical wall portion having a motor-side positioning portion disposed on one of an inner and outer circumferential surface of the cylindrical wall portion for being fitted to a member of the motor assembly, and a pump-side positioning portion disposed on the other of an inner and outer circumferential surface of the cylindrical wall portion for being fitted to a member of the pump assembly.Type: GrantFiled: June 28, 2002Date of Patent: December 2, 2003Assignee: Ebara CorporationInventors: Yoshiaki Miyazaki, Hiroshi Uchida, Kenichi Kajiwara
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Publication number: 20030174450Abstract: According to the present invention, in a water supply apparatus which converts output power of a solar cell with an inverter to drive a motor pump for pumping up water, a DC brushless motor having no sensor for detecting a position of a rotatable shaft is used as a motor for driving the pump.Type: ApplicationFiled: May 19, 2003Publication date: September 18, 2003Inventors: Kaoru Nakajima, Kenichi Kajiwara, Masahito Kawai, Masahiko Kishi, Nobuhiro Higaki, Yukio Murai
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Publication number: 20030003002Abstract: A casing cover is used in separating a motor assembly and a pump assembly from each other in a pump device. The casing cover has a cylindrical wall portion having a motor-side positioning portion disposed on one of an inner and outer circumferential surface of the cylindrical wall portion for being fitted to a member of the motor assembly, and a pump-side positioning portion disposed on the other of an inner and outer circumferential surface of the cylindrical wall portion for being fitted to a member of the motor assembly.Type: ApplicationFiled: June 28, 2002Publication date: January 2, 2003Applicant: Ebara CorporationInventors: Yoshiaki Miyazaki, Hiroshi Uchida, Kenichi Kajiwara
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Patent number: 6390773Abstract: An annular flange member is provided which is adapted to be provided around a fluid passage opening of a housing of a hydraulic machine to connect a fluid conduit means to the fluid passage opening. The annular flange member comprises an inside surface facing the housing, an outside surface opposite the inside surface, and a through hole extending from the inside surface to the outside surface and fluidly communicated with the fluid passage opening. The outside surface is provided with an O-ring receiving groove surrounding the through hole which is formed by a half die cutting press operation. A hydraulic machine is provided which includes a flange member as noted above.Type: GrantFiled: June 19, 2000Date of Patent: May 21, 2002Assignee: Ebara CorporationInventors: Kenichi Kajiwara, Akihiro Ohsaki, Jun-ichi Sunaga
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Patent number: 5357124Abstract: A superluminescent diode (SLD) includes a substrate, a double heterojunction structure including a first conductivity type first cladding layer, an undoped active layer, and a second conductivity type second cladding layer. A second conductivity type first diffused region having a stripe shape and a length extends from a front facet halfway to the rear facet through which current is injected into the active layer and a second conductivity type second diffused region spaced from the first diffused region extends through the second cladding layer and the active layer and into the first cladding layer between the first diffused region and the rear facet of the device. Even when operating at high light output power, light reflections are reduced so that the SLD operates with hardly any laser oscillation.Type: GrantFiled: July 2, 1993Date of Patent: October 18, 1994Assignees: Mitsubishi Precision Co. Ltd, Mitsubishi Denki KabushikiInventors: Kenichi Kajiwara, Satoshi Arimoto, Etsuji Omura
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Patent number: 5223722Abstract: A superluminescent diode includes a substrate; a double heterojunction structure including a first conductivity type cladding layer, an undoped or first or second conductivity type active layer, and a second conductivity type cladding layer disposed on said substrate; a first conductivity type cap layer disposed on the second conductivity type cladding layer; and a second conductivity type stripe-shaped diffusion region penetrating the cap layer and reaching into the second conductivity type cladding layer. Current is injected into the active layer through the diffusion region. The stripe-shaped diffusion region extends from a front facet toward but not reaching a rear facet and is inclined an angle in a range from 3 to 20 degrees with respect to the front facet.Type: GrantFiled: March 12, 1992Date of Patent: June 29, 1993Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Precision Kabushiki KaishaInventors: Yutaka Nagai, Kenichi Kajiwara
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Patent number: 5133642Abstract: A pipe joint for a pump including a pump casing having a pipe connecting flange, comprising a flange body produced from a steel plate such that the inner peripheral portion thereof that defines a water passage is extended toward the casing body and secured by welding to an outlet/inlet opening in the casing body directly or through a cylindrical member, the flange body having a plurality of bolt holes provided in a flange face thereof, and a retainer plate being installed in such a manner as to abut against the reverse side of the flange face, the retainer plate having an annular rib with a square outer shape and a U-shaped cross section which projects toward the casing body, the annular rib being provided in the bottom of the U-shaped cross section with a plurality of bolt holes respectively corresponding to the bolt holes, the retainer plate further having a raised face formed integral with the annular rib at the inner side thereof or at each of the outer and inner sides thereof such that the raised face abType: GrantFiled: August 24, 1990Date of Patent: July 28, 1992Assignee: Ebara CorporationInventor: Kenichi Kajiwara
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Patent number: 5112190Abstract: A sheet-metal centrifugal pump casing comprising a casing shell having a suction port and being formed of a steel plate by means of deep drawing using a press, and having a suction flange firmly attached to the suction port of the casing shell is disclosed. The centrifugal pump casing further comprises a partition body firmly attached to the inner surface of the casing shell for partitioning a space within the casing shell into a suction chamber and a pressure chamber, and a diffuser which is integrally extended from the suction side end portion of the partition body and which tapers off toward peripheral edge of said suction port so that an axial gap is formed between the end edge of the diffuser and the peripheral edge of said suction port.Type: GrantFiled: July 13, 1990Date of Patent: May 12, 1992Assignee: Ebara CorporationInventors: Kenichi Kajiwara, Kikuichi Mori, Hideo Ikeda, Shinichiro Arakawa
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Patent number: 5040947Abstract: A pump casing manufactured by press forming of steel plate and including a volute casing encircling a pump impeller so as to form a fluid path around the pump impeller is disclosed. The cross-sectional area of the fluid path is gradually increased towards a discharge port of the pump casing. The pump casing includes a casing body which is formed at first by press forming a metal plate into a cylindrical cup shape having an opening portion at one side thereof and a closed bottom portion at the other side of the same, and then by press forming the cylindrical cup shaped casing body so as to have a volute portion radially outwardly expanded from a cylindrical surface of the casing body at an axially intermediate portion thereof which radially opposite to the pump impeller, a casing flange outwardly extending from the opening portion and an aperture serving as a suction port at the bottom portion.Type: GrantFiled: January 18, 1990Date of Patent: August 20, 1991Assignee: Ebara CorporationInventors: Kenichi Kajiwara, Kikuichi Mori, Hideo Ikeda, Shinichiro Arakawa