Patents by Inventor Kiyoshi Maekawa
Kiyoshi Maekawa 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: 20120306426Abstract: A motor control device includes: a feedforward computing section for computing a motion reference value and a feedforward driving force based on a motion command; a deviation compensation computing section for outputting a deviation compensation driving force by a control computation for reducing a control deviation; a driving-force command synthesizing section for outputting a driving-force command based on the feedforward driving force and the deviation compensation driving force; a reaction-force compensation computing section for computing a motion correction value based on a predetermined reaction-force reference value and the deviation compensation driving force; and a control-deviation computing section for computing the control deviation based on a deviation between the motion reference value and a motor motion detection value, and the motion correction value.Type: ApplicationFiled: January 25, 2011Publication date: December 6, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hidetoshi Ikeda, Yoshihiro Marushita, Koichiro Ueda, Yuji Igarashi, Kiyoshi Maekawa
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Patent number: 8138693Abstract: A computing unit simulates an ideal operation of a vibration excitation actuator by using at least a model operation parameter and the vibration-excitation movable mass data and calculates a parameter corresponding to acceleration/deceleration thrust for moving the vibration-excitation movable mass. A vibration isolation controller determines a control content of a vibration isolation driving unit based on the parameter corresponding to the acceleration/deceleration thrust and controls an operation of the vibration isolation driving unit so that a force canceling a reaction force, which acts on an apparatus when a vibration-excitation movable mass is moved, acts on the apparatus by moving the vibration isolation movable unit.Type: GrantFiled: November 27, 2007Date of Patent: March 20, 2012Assignee: Mitsubishi Electric CorporationInventors: Kei Terada, Tetsuaki Nagano, Kiyoshi Maekawa, Emiko Hayasaka
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Publication number: 20120035771Abstract: A positive & negative jerk interval parameter setting section divides an acceleration & deceleration interval of an acceleration command curve into an acceleration increasing interval, a constant acceleration interval, and an acceleration decreasing interval, and sets the length of time of each interval independently of each other. A positive & negative jerk interval trigonometric command generating section employs an acceleration command curve generated based on a trigonometric function of a ½ cycle, thereby generating a position command or a speed command.Type: ApplicationFiled: April 21, 2010Publication date: February 9, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kiyoshi Maekawa, Yuko Takehana, Masahiko Hirano
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Publication number: 20110035028Abstract: A residual-velocity calculating unit calculates a residual velocity that corresponds to a velocity increment when an acceleration is reduced from a current command acceleration to zero according to an acceleration reduction curve. A differential-velocity calculating unit calculates a differential velocity vs=v0-vn, which is a difference between a target velocity v0 and a current velocity command for every command generation period. An acceleration-reduction-start-timing determining unit compares the residual velocity to the differential velocity for determining whether acceleration reduction starts. When a condition that the residual velocity is equal to or larger than the differential velocity is satisfied, the acceleration-reduction-start-timing determining unit determines the start of the acceleration reduction and starts to reduce the command acceleration according to the acceleration reduction curve generated by the command generating unit.Type: ApplicationFiled: May 29, 2008Publication date: February 10, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kiyoshi Maekawa, Yuko Takehana, Satoshi Mizogami, Masahiko Hirano
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Patent number: 7778716Abstract: A command generating device includes a command shape calculating unit for calculating an nth derivative command shape which is a fixed multiple of the nth derivative with respect to time of a position command for causing a machine to reach a target position at a positioning time so that a convolution of a velocity command which is the first derivative with respect to time of the position command and the impulse response of a transfer function determined from the frequency of a vibration which occurs in the machine becomes equal to zero, the convolution being calculated over the time period from the positioning time onward, and an associating processing unit for integrating the nth derivative command shape n times with respect to time, and for multiplying the integral result by a constant which associates the position command at the positioning time with the target position so as to determine the position command.Type: GrantFiled: December 9, 2008Date of Patent: August 17, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Koichiro Ueda, Hidetoshi Ikeda, Kiyoshi Maekawa
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Publication number: 20100060220Abstract: A computing unit simulates an ideal operation of a vibration excitation actuator by using at least a model operation parameter and the vibration-excitation movable mass data and calculates a parameter corresponding to acceleration/deceleration thrust for moving the vibration-excitation movable mass. A vibration isolation controller determines a control content of a vibration isolation driving unit based on the parameter corresponding to the acceleration/deceleration thrust and controls an operation of the vibration isolation driving unit so that a force canceling a reaction force, which acts on an apparatus when a vibration-excitation movable mass is moved, acts on the apparatus by moving the vibration isolation movable unit.Type: ApplicationFiled: November 27, 2007Publication date: March 11, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kei Terada, Tetsuaki Nagano, Kiyoshi Maekawa, Emiko Hayasaka
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Patent number: 7627387Abstract: A command generating device includes a command shape calculating unit for calculating an nth derivative command shape which is a fixed multiple of the nth derivative with respect to time of a position command for causing a machine to reach a target position at a positioning time so that a convolution of a velocity command which is the first derivative with respect to time of the position command and the impulse response of a transfer function determined from the frequency of a vibration which occurs in the machine becomes equal to zero, the convolution being calculated over the time period from the positioning time onward, and an associating processing unit for integrating the nth derivative command shape n times with respect to time, and for multiplying the integral result by a constant which associates the position command at the positioning time with the target position so as to determine the position command.Type: GrantFiled: October 14, 2005Date of Patent: December 1, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Koichiro Ueda, Hidetoshi Ikeda, Kiyoshi Maekawa
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Publication number: 20090177296Abstract: A command generating device includes a command shape calculating unit for calculating an nth derivative command shape which is a fixed multiple of the nth derivative with respect to time of a position command for causing a machine to reach a target position at a positioning time so that a convolution of a velocity command which is the first derivative with respect to time of the position command and the impulse response of a transfer function determined from the frequency of a vibration which occurs in the machine becomes equal to zero, the convolution being calculated over the time period from the positioning time onward, and an associating processing unit for integrating the nth derivative command shape n times with respect to time, and for multiplying the integral result by a constant which associates the position command at the positioning time with the target position so as to determine the position command.Type: ApplicationFiled: December 9, 2008Publication date: July 9, 2009Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Koichiro Ueda, Hidetoshi Ikeda, Kiyoshi Maekawa
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Publication number: 20060229745Abstract: A command generating device includes a command shape calculating unit (5) for calculating an nth derivative command shape which is a fixed multiple of the nth derivative with respect to time of a position command for causing a machine (4) to reach a target position at a positioning time so that a convolution of a velocity command which is the first derivative with respect to time of the position command and the impulse response of a transfer function determined from the frequency of a vibration which occurs in the machine becomes equal to zero, the convolution being calculated over the time period from the positioning time onward, and an associating processing unit (6) for integrating the nth derivative command shape n times with respect to time, and for multiplying the integral result by a constant which associates the position command at the positioning time with the target position so as to determine the position command.Type: ApplicationFiled: October 14, 2005Publication date: October 12, 2006Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Koichiro Ueda, Hidetoshi Ikeda, Kiyoshi Maekawa
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Interdental brushes having roughened, tapered and rounded bristle ends and method of making the same
Patent number: 5791740Abstract: An interdental twisted wire brush having roughened, tapered and rounded bristle ends prepared by rotating the interdental brush both transversely to the axis of the brush and axially along its longitudinal axis, while flexing the bristles and grinding the bristle ends of the interdental brush against a flat, moving abrasive surface.Type: GrantFiled: March 12, 1996Date of Patent: August 11, 1998Assignee: John O. Butler CompanyInventors: Dominic Squillaci, Scott Koepsel, John Shimkus, Kiyoshi Maekawa -
Interdental brushes having roughened, tapered and rounded bristle ends and method of making the same
Patent number: 5778476Abstract: An interdental twisted wire brush having roughened, tapered and rounded bristle ends prepared by rotating the interdental brush both transversely to the axis of the brush and axially along its longitudinal axis, while flexing the bristles and grinding the bristle ends of the interdental brush against a flat, moving abrasive surface.Type: GrantFiled: June 20, 1996Date of Patent: July 14, 1998Assignee: John O. Butler Company, Inc.Inventors: Dominic Squillaci, Scott Koepsel, John Shimkus, Kiyoshi Maekawa -
Patent number: 5758382Abstract: An interdental toothbrush handle for holding a twisted wire brush includes a handle with a locking retainer connected thereto by a living hinge. The handle has two opposing side walls which extend perpendicularly from the handle and are adjacent to the living hinge. At least one of the walls includes a V-shaped gap for receiving the stem of a twisted wire brush. The handle also preferably has an indentation between the two opposing side walls and the locking retainer preferably includes a protrusion in communication with the indentation. A nub on the protrusion prevents the locking retainer from opening more than about 30.degree. to 40.degree.. The stem of a twisted wire brush is inserted into the V-shaped gap when the locking retainer is open. As the locking retainer is closed, the stem of the twisted wire brush is captured between the handle and locking retainer.Type: GrantFiled: September 12, 1995Date of Patent: June 2, 1998Assignee: John O. Butler Company, Inc.Inventors: Kiyoshi Maekawa, Scott Koepsel
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Patent number: 5702686Abstract: A clear, mildly abrasive, low-viscosity dentrifice gel for use with twisted wire interdental brushes which comprises optimal humectant, silica abrasive and water concentration levels.Type: GrantFiled: July 18, 1995Date of Patent: December 30, 1997Assignee: John O. Butler CompanyInventors: Kiyoshi Maekawa, Christina M. Calhoon
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Patent number: 5489625Abstract: A dental adhesive coating base composition comprising a copolymer represented by formula (I) or (II) in an amount of from 5 to 40 wt % based on the total amounts of the composition; and an oral composition comprising at least one of a copolymer represented by formula (I) and a copolymer represented by formula (II) in an amount of from 5 to 40 wt % based on the total amount of the composition, at least one of a phosphoric acid and tartaric acid present in an amount effective to increase the solubility of fluoride in the composition, up to an amount of 6 wt % or less based on the total amount of the composition; a fluorine-containing compound in an amount effective for dental caries prevention; and a volatile nonaqueous solvent are disclosed: ##STR1## wherein R.sup.11 represents an alkyl group having from 1 to 10 carbon atoms; R.sup.12 represents a lower alkyl group having from 1 to 2 carbon atoms, provided that three R.sup.12 groups must be the same; R.sup.13, R.sup.14, R.sup.15, R.sup.16 and R.sup.Type: GrantFiled: November 25, 1992Date of Patent: February 6, 1996Assignees: Sunstar Kabushiki Kaisha, Osaka Organic Chemical Industries Co., Ltd.Inventors: Yutaka Moriwaki, Yujiro Uchiyama, Akio Tani, Shigeaki Matsumoto, Hiroshi Furumichi, Takao Makishima, Kiyoshi Maekawa
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Patent number: 5193559Abstract: A dental cleaning instrument for cleaning the interproximal area between teeth is constructed with three threads of yarn. The first thread is initially supported on a first post and a second thread of yarn is supported on a second post. The third thread is wound on a bobbin and then interlaced around and between the first and second threads in a figure-8 pattern, while the first and second threads are simultaneously advanced in a direction normal to the plane in which the bobbin is moving. The resulting instrument consists of woven threads having a combined denier in the range of 480-1240, with superior spreadability and separation of ends.Type: GrantFiled: May 1, 1992Date of Patent: March 16, 1993Inventors: Kiyoshi Maekawa, Timothy D. Ladd
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Patent number: D260328Type: GrantFiled: November 26, 1979Date of Patent: August 25, 1981Assignee: Sunstar, Inc.Inventors: Gerald C. Neely, Kiyoshi Maekawa
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Patent number: D351733Type: GrantFiled: October 5, 1993Date of Patent: October 25, 1994Assignee: John O. Butler CompanyInventors: Kiyoshi Maekawa, Scott Koepsel