Patents by Inventor Yasuhiro Iwasaki
Yasuhiro Iwasaki 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: 8627918Abstract: An electric power steering device includes a steering column in which a steering shaft for transmitting a steering torque is built, an electric motor for transmitting a steering assist force through a gear mechanism in a gearbox to the steering shaft, and a control device for driving and controlling the electric motor. The control device includes a drive circuit module having a switching element for driving the electric motor, and a control module that is mounted on the gearbox for controlling the drive circuit module. The drive circuit module is mounted on a housing of the electric motor.Type: GrantFiled: October 29, 2010Date of Patent: January 14, 2014Assignee: NSK Ltd.Inventors: Takaaki Sekine, Shin Kumagai, Yusuke Ota, Yasuhiro Iwasaki, Yousuke Imamura, Yusuke Kikuchi
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Publication number: 20120273292Abstract: There is provided an electric power steering device for solving unsolved problems with ensuring advantages of a control device of motor housing mounting type and gearbox mounting type. An electric power steering device includes: a steering column in which a steering shaft for transmitting a steering torque is built; an electric motor for transmitting a steering assist force through a gear mechanism in a gearbox to the steering shaft; and a control device for driving and controlling the electric motor. The control device including at least: a drive circuit module including a switching element for driving the electric motor, and mounted on a housing of the electric motor; and a control module, mounted on the gearbox, for controlling the drive circuit module.Type: ApplicationFiled: October 29, 2010Publication date: November 1, 2012Applicant: NSK LTD.Inventors: Takaaki Sekine, Shin Kumagai, Yusuke Ota, Yasuhiro Iwasaki, Yousuke Imamura, Yusuke Kikuchi
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Patent number: 5826330Abstract: In a method of manufacturing a multilayer printed wiring board including an internal wiring circuit formed on a board, an insulating resin layer formed on the internal wiring circuit, a blind hole formed in the insulating resin layer and communicating with the internal wiring circuit, and a conductive portion formed on an inner wall of the blind hole and connected to the internal wiring circuit, the blind hole is formed by using a short-pulse CO.sub.2 laser.Type: GrantFiled: December 18, 1996Date of Patent: October 27, 1998Assignee: Hitachi AIC Inc.Inventors: Satoshi Isoda, Yasuhiro Iwasaki, Kenshirou Fukuzato, Tsutomu Zama, Koichi Noguchi, Toshiro Okamura, Hiroyoshi Yokoyama, Youiti Matuda
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Patent number: 5028303Abstract: A working electrode is positioned to form a predetermined gap between the working electrode and a surface of a work, and the electrode and the work are submerged in an electrolyte. Pulses are applied to the working electrode to machine the work. A pair of standard electrodes are set in the electrolyte, and electric energy in the form of a pulse is applied to the standard electrodes. Current flowing between the standard electrodes is detected and the current density of the current flowing between the working electrode and the work is controlled based on the detected current.Type: GrantFiled: April 6, 1989Date of Patent: July 2, 1991Assignee: Shizuoka Seiki Co. Ltd.Inventors: Youhei Kuwabara, Teruo Asaoka, Yasuhiro Iwasaki, Haruki Sugiyama, Yoshiharu Suzuki
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Patent number: 4880516Abstract: An electro-chemical machine supplies pulses to a spaced workpiece and electrode in a working tank through an electrolyte in order to finish the workpiece, while eliminating electrolytic products produced in a gap between the workpiece and electrode by supplying clean electrolyte to the gap. This machine includes: an electrolyte filtering apparatus for removing dirty electrolyte containing electrolytic products from the working tank and filtering it; an electrolyte supplying apparatus for intermittently supplying the filtered electrolyte to the gap through a supply hole formed in the electrode; and a power supply apparatus for supplying the pulses to the workpiece and electrode when the flow of electrolyte to the gap stops. Clean electrolyte can be supplied to the gap almost simultaneously with the removal of dirty electrolyte, and then the finishing work is started. A glossy mirror surface on the workpiece can be automatically obtained by repeating those operations.Type: GrantFiled: June 13, 1988Date of Patent: November 14, 1989Assignee: Shizuoka Seiki Co., Ltd.Inventors: Youhei Kuwabara, Teruo Asaoka, Yasuhiro Iwasaki
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Patent number: 4842702Abstract: An electrode is positioned with a predetermined gap between the electrode and a surface of a work in an electrolyte tank. Pulses are applied to the electrode. Electrolyte including residual products is discharged from the tank. Clean electrolyte is supplied to the electrolyte tank for next machining. After predetermined time, pulses for the next machining are applied to the electrode.Type: GrantFiled: April 18, 1988Date of Patent: June 27, 1989Assignee: Shizuoka Seiki Co., Ltd.Inventors: Youhei Kuwabara, Teruo Asaoka, Yasuhiro Iwasaki
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Patent number: 4800006Abstract: An electrode is positioned with a predetermined gap between the electrode and a surface of a work in an electrolyte tank. Pulses are intermittently applied to the electrode. Electrolyte including residual products is discharged from the tank. The discharged electrolyte is cleaned by a filtering device to produce clean electrolyte. The clean electrolyte is supplied to the electrolyte tank for next machining.Type: GrantFiled: October 22, 1987Date of Patent: January 24, 1989Assignee: Shizuoka Seiki Co., Ltd.Inventors: Youhei Kuwabara, Teruo Asaoka, Masayoshi Moriya, Yasuhiro Iwasaki, Haruki Sugiyama
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Patent number: 4292821Abstract: A needle selection mechanism in a hand-operated knitting machine in which collisions of parts are minimized to reduce production of noises is disclosed. The mechanism comprises a patterning data carrier mounted alongside a needle bed and a pair of needle selector units mounted on a carriage and each including first and second drums each having a set of tiltable data storing elements mounted thereon. A set of patterning data are applied from the data carrier to each selector unit to be stored thereon when the unit passes the carrier which is fed from row to row when the carriage passes it. During a movement of the carriage on the needle bed, a preceding one of the selector units effects selective actuations of movable knitting needles in accordance with the data stored thereon.Type: GrantFiled: November 27, 1979Date of Patent: October 6, 1981Assignee: Silver Seiko, Ltd.Inventors: Mitsuhito Koike, Yasuhiro Iwasaki
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Patent number: 4109489Abstract: In a hand-operated knitting machine having a machine body, a needle bed, a carriage slideably mounted on said needle bed, and electrical means on said machine body and on said carriage, means for providing electrical connection between said electrical means without mechanically or otherwise interfering with machine operation. Interference is avoided by the use of a coiled electrical cord suspended from a lever pivotally mounted on a rod mounted on the machine body, the lever being positioned above the carriage and needle bed.Type: GrantFiled: March 4, 1977Date of Patent: August 29, 1978Assignee: Silver Seiko Ltd.Inventor: Yasuhiro Iwasaki