Patents by Inventor Kazumichi Hanai
Kazumichi Hanai 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: 9246365Abstract: A brushless motor may comprise a rotor comprising a shaft, a back yoke fixed on the shaft, a permanent magnet disposed at an outer circumference of the back yoke and first and second resin portions. The first resin portion may be formed at one ends of the back yoke and the permanent magnet and the second resin portion may be formed at other ends. The first and second resin portions may be fixed the back yoke and the permanent magnet. A communication hole communicating one end side and another end side in the shaft axis direction may be formed through the back yoke or between the shaft and the back yoke. A third resin portion connecting with the first and the second resin portions may be formed within the communication hole. The first, second and third resin portions may be formed integrally.Type: GrantFiled: January 18, 2013Date of Patent: January 26, 2016Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Yoshihiko Honda, Yoichi Kawakita, Kazumichi Hanai
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Patent number: 8647082Abstract: A fuel pump may include a motor section comprising a rotor and a stator. One of the rotor and the stator may have at least a pair of permanent magnet parts disposed along a first circumferential surface at an interval in a circumferential direction, and at least two magnetic material parts disposed between ends of adjacent permanent magnet parts. The other one of the rotor and the stator may have a first yoke disposed so as to face the permanent magnet parts, wherein a plurality of slots are formed on the first yoke at an interval in the circumferential direction. A surface facing the slots of the magnetic material parts may be shifted, in at least a partial range in the circumferential direction including a permanent magnet part side end where a polarity of a first circumferential surface side is a north pole, from the first circumferential surface in a direction along which a distance to the slots increases.Type: GrantFiled: November 15, 2010Date of Patent: February 11, 2014Assignee: Aisan Kogyo Kabushiki KaishaInventors: Hiroaki Naito, Kazumichi Hanai
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Patent number: 8333175Abstract: On aspect according to the present invention includes a fuel supply system including a backflow preventing device provided in a fuel supply path communicating between a fuel pump and a fuel injecting valve device of an engine. The backflow preventing device can prevent backflow of the fuel from the fuel injecting valve device, so that a pressure of the fuel between the backflow preventing device and the fuel injecting valve device can maintained after stopping the fuel pump.Type: GrantFiled: January 12, 2010Date of Patent: December 18, 2012Assignee: Aisan Kogyo Kabushiki KaishaInventors: Toshio Nishio, Koji Yoshida, Hideaki Nishibu, Kazumichi Hanai, Yuichi Murakoshi
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Patent number: 8297913Abstract: A fuel pump has a casing and an impeller. The impeller is substantially disk shaped having an upper surface and a lower surface The impeller is rotatable within the casing around a rotational axis. A plurality of impeller depressions is formed in at least the lower surface of the impeller. The plurality of impeller depressions is located on at least one of the inside and the outside of a group of concavities. The plurality of impeller depressions is arranged on a circle around the rotational axis of the impeller. Each of the impeller depressions has its deepest portion in a rear half thereof with respect to the rotational direction of the impeller.Type: GrantFiled: September 27, 2007Date of Patent: October 30, 2012Assignee: Aisan Kogyo Kabushiki KaishaInventor: Kazumichi Hanai
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Patent number: 8288903Abstract: A stator of a rotary electric motor has core segments. All or some of the core segments have terminal mounting members for mounting terminals to which coils are connected. The terminal mounting member and the bobbin for each of the core segments are molded by resin and integrated with the corresponding core segment.Type: GrantFiled: July 22, 2010Date of Patent: October 16, 2012Assignee: Aisan Kogyo Kabushiki KaishaInventors: Tatsuhisa Matsuda, Futoshi Abe, Kazumichi Hanai, Hiroaki Naito, Atsushi Sugimoto, Fusatomo Miyake
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Patent number: 8264186Abstract: The present invention includes a control device capable of applying a high voltage to a motor of a fuel pump for an appropriate period of time during a low voltage operation of the motor.Type: GrantFiled: October 30, 2009Date of Patent: September 11, 2012Assignee: Aisan Kogyo Kabushiki KaishaInventors: Kazumichi Hanai, Kazuhiro Yoneshige
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Publication number: 20110116955Abstract: A fuel pump may include a motor section comprising a rotor and a stator. One of the rotor and the stator may have at least a pair of permanent magnet parts disposed along a first circumferential surface at an interval in a circumferential direction, and at least two magnetic material parts disposed between ends of adjacent permanent magnet parts. The other one of the rotor and the stator may have a first yoke disposed so as to face the permanent magnet parts, wherein a plurality of slots are formed on the first yoke at an interval in the circumferential direction. A surface facing the slots of the magnetic material parts may be shifted, in at least a partial range in the circumferential direction including a permanent magnet part side end where a polarity of a first circumferential surface side is a north pole, from the first circumferential surface in a direction along which a distance to the slots increases.Type: ApplicationFiled: November 15, 2010Publication date: May 19, 2011Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Hiroaki Naito, Kazumichi Hanai
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Publication number: 20110020154Abstract: A stator of a rotary electric motor has core segments. All or some of the core segments have terminal mounting members for mounting terminals to which coils are connected. The terminal mounting member and the bobbin for each of the core segments are molded by resin and integrated with the corresponding core segment.Type: ApplicationFiled: July 22, 2010Publication date: January 27, 2011Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Tatsuhisa MATSUDA, Futoshi ABE, Kazumichi HANAI, Hiroaki NAITO, Atsushi SUGIMOTO, Fusatomo MIYAKE
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Publication number: 20100175666Abstract: On aspect according to the present invention includes a fuel supply system including a backflow preventing device provided in a fuel supply path communicating between a fuel pump and a fuel injecting valve device of an engine. The backflow preventing device can prevent backflow of the fuel from the fuel injecting valve device, so that a pressure of the fuel between the backflow preventing device and the fuel injecting valve device can maintained after stopping the fuel pump.Type: ApplicationFiled: January 12, 2010Publication date: July 15, 2010Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Toshio NISHIO, Koji YOSHIDA, Hideaki NISHIBU, Kazumichi HANAI, Yuichi MURAKOSHI
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Publication number: 20100111710Abstract: The present invention includes a control device capable of applying a high voltage to a motor of a fuel pump for an appropriate period of time during a low voltage operation of the motor.Type: ApplicationFiled: October 30, 2009Publication date: May 6, 2010Inventors: Kazumichi Hanai, Kazuhiro Yoneshige
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Publication number: 20090108694Abstract: A rotor for being used in a motor is provided with a shaft, a yoke attached to the shaft, a magnet attached to the yoke, and an elastic member attached to at least one of the shaft and the yoke. The elastic member forces the magnet towards the yoke along an axial direction of the shaft.Type: ApplicationFiled: October 15, 2008Publication date: April 30, 2009Applicant: Aisan Kogyo Kabushiki KaishaInventor: Kazumichi HANAI
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Publication number: 20080085181Abstract: A fuel pump has a casing and an impeller. The impeller is substantially disk shaped having an upper surface and a lower surface The impeller is rotatable within the casing around a rotational axis. A plurality of impeller depressions is formed in at least the lower surface of the impeller. The plurality of impeller depressions is located on at least one of the inside and the outside of a group of concavities. The plurality of impeller depressions is arranged on a circle around the rotational axis of the impeller. Each of the impeller depressions has its deepest portion in a rear half thereof with respect to the rotational direction of the impeller.Type: ApplicationFiled: September 27, 2007Publication date: April 10, 2008Applicant: AISAN KOGYO KABUSHIKI KAISHAInventor: Kazumichi HANAI
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Patent number: 7063502Abstract: A fuel pump prevents pressurized fuel from being pulled into a clearance between an outer circumference face of an impeller and an inner circumference face of a pump case, thereby allowing the delivery of the pressurized fuel from a pump body side to a pump cover side through through-holes of the impeller. Since a clearance C2 between an impeller outer circumference face 16p and a pump cover inner circumference face 39c is made extremely small, the pressurized fuel is caused to pass via through-holes 16c that communicate between an upper and an lower side of an impeller 16. By this means, it is difficult for the pressurized fuel to enter the clearance C2, and it is possible to prevent the decrease in pump efficiency caused by pressure at the impeller outer circumference face 16p and the vicinity thereof.Type: GrantFiled: March 25, 2004Date of Patent: June 20, 2006Assignee: Aisan Kogyo Kabushiki KaishaInventors: Yoshihiko Honda, Kazumichi Hanai
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Patent number: 7025561Abstract: Mass-produced fuel pumps having a stable pump efficiency comprising a circumferential groove 20 is formed within a pump body 15 and the groove 20 is divided into a first region having a constant cross-sectional area L, a second region having a cross sectional area that gradually becomes smaller toward the downstream side, and a third region having a constant cross-sectional area M. A suction hole 22 is formed within the pump body 15 and is inclined toward the rotational direction of the impeller. The suction hole 22 is communicated with the groove 20 in the first region. Even if the inclination angle of the suction hole 22 varies among mass-produced fuel pumps, the cross-sectional area L of the groove 20 is constant at the location where the suction hole 22 is communicated with the groove 20. Therefore, variations in the amount of fuel sucked into the fuel pump can be reduced. Accordingly, pump efficiency of the mass-produced fuel pumps can be stabilized.Type: GrantFiled: June 16, 2004Date of Patent: April 11, 2006Assignee: Aisan Kogyo Kabushiki KaishaInventors: Yoshihiko Honda, Kazumichi Hanai, Koichi Iwata
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Publication number: 20040258515Abstract: Mass-produced fuels pumps having a stable pump efficiency is taught.Type: ApplicationFiled: June 16, 2004Publication date: December 23, 2004Inventors: Yoshihiko Honda, Kazumichi Hanai, Koichi Iwata
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Publication number: 20040191054Abstract: A fuel pump prevents pressurized fuel from being pulled into a clearance between an outer circumference face of an impeller and an inner circumference face of a pump case, thereby allowing the delivery of the pressurized fuel from a pump body side to a pump cover side through through-holes of the impeller.Type: ApplicationFiled: March 25, 2004Publication date: September 30, 2004Inventors: Yoshihiko Honda, Kazumichi Hanai
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Patent number: 6047672Abstract: A method of driving an engine valve-driving electromagnetic valve, wherein a permanent magnet is provided in a movable element of the electromagnetic valve, and springs are omitted, and wherein repulsion and attraction electric currents are varied according to the engine speed, thereby reducing the electric power consumption. The permanent magnet is magnetized in the axial direction. When the repulsion current is passed through one exciting coil, the attraction current is passed through the other exciting coil, thereby moving an engine valve to an open position. When the attraction current is passed through the one exciting coil, the repulsion current is passed through the other exciting coil, thereby moving the engine valve to a closed position. In the low-engine speed region, the current value is smaller and the energization time is longer than in the high-engine speed region.Type: GrantFiled: March 3, 1999Date of Patent: April 11, 2000Assignee: Aisan Kogyo Kabushiki KaishaInventors: Kazumichi Hanai, Junya Kimoto, Eisuke Kato
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Patent number: 5148678Abstract: An exhaust gas flow control valve for an internal combustion engine comprises a body, a diaphragm actuator and a bracket. The body is equipped with an exhaust passage and a valve member arranged in the exhaust passage. The bracket is equipped with an actuator mounting seat for mounting the diaphragm actuator and a body mounting seat connected to the body. The diaphragm actuator is equipped with a casing connected to the actuator mounting seat of the bracket, a diaphragm cased in the casing and a rod protruding from the diaphragm and out of the casing for actuating the valve member in accordance with the action of the diaphragm. Between the actuator mounting seat of the bracket and the diaphragm of the diaphragm actuator, moreover, there is formed an insulating layer for insulating the heat to be transferred to the diaphragm.Type: GrantFiled: December 20, 1990Date of Patent: September 22, 1992Assignee: Aisan Kogyo Kabushiki KaishaInventors: Hironori Ueda, Kazumichi Hanai, Hitoshi Takeuchi, Kazutaka Nakamichi, Takashi Kubota
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Patent number: 5053664Abstract: A motor-driven fuel pump including a brushless motor; a motor housing for enclosing the brushless motor; and a pump section adapted to be driven by the brushless motor for sucking a fuel and pumping the same into the motor housing.Type: GrantFiled: December 21, 1989Date of Patent: October 1, 1991Assignee: Aisan Kogyo Kabushiki KaishaInventors: Hikaru Kikuta, Koichi Mine, Kazumichi Hanai, Kingo Kamiya, Hitoshi Takeuchi
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Patent number: 5009575Abstract: A multi-stage motor-driven fuel pump including a motor section provided with an electric motor and a pump section to be driven by the electric motor, the pump section having a plurality of pump chambers partitioned by intermediate plates and communicated with each other by a fuel communication hole formed through each of the intermediate plates. A ratio of a sectional area of the fuel communication hole of any one of the intermediate plates between adjacent ones of the pump chambers to a sectional area of the pump chamber on a lower pressure side is set in a predetermined range such that a gradient of fuel pressure increase in the pump section is increased to early prevent vapor lock.Type: GrantFiled: October 31, 1989Date of Patent: April 23, 1991Assignee: Aisan Kogyo Kabushiki KaishaInventors: Kazumichi Hanai, Koichi Mine, Hikaru Kikuta