Patents by Inventor Kazuhiko Nishii
Kazuhiko Nishii 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: 9407195Abstract: A power tool includes a motor, a gear mechanism that changes the speed of an output of the motor, a drive circuit including a switching element that controls power supplied to the motor, a housing that accommodates the motor, a fixture that fixes the motor to the housing, and a temperature sensor that measures a temperature of the switching element. The drive circuit stops supplying power to the motor when the temperature measured by the temperature sensor reaches a predetermined temperature. The fixture functions to radiate heat from the switching element.Type: GrantFiled: April 30, 2013Date of Patent: August 2, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kazuhiko Nishii, Hidezumi Okamura
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Publication number: 20150209952Abstract: An auxiliary handle includes a base portion having a tubular shape, a connection portion accommodated within an internal space of the base portion in a state in which the connection portion is movable in an axial direction of the base portion, and a band portion curved along an outer circumferential surface of the body case. The band portion includes opposite end portions connected to each other through the connection portion within the internal space of the base portion. The auxiliary handle further includes an adjusting mechanism configured to, by moving the connection portion in the axial direction, change a position of the opposite end portions of the band portion and adjust a length of a part of the band portion exposed from the base portion. The base portion includes a rib for defining a limit of movement of the band portion toward the other axial end portion.Type: ApplicationFiled: January 28, 2015Publication date: July 30, 2015Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Kazuhiko NISHII, Hidezumi OKAMURA
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Publication number: 20130300331Abstract: A power tool includes a motor, a gear mechanism that changes the speed of an output of the motor, a drive circuit including a switching element that controls power supplied to the motor, a housing that accommodates the motor, a fixture that fixes the motor to the housing, and a temperature sensor that measures a temperature of the switching element. The drive circuit stops supplying power to the motor when the temperature measured by the temperature sensor reaches a predetermined temperature. The fixture functions to radiate heat from the switching element.Type: ApplicationFiled: April 30, 2013Publication date: November 14, 2013Applicant: Panasonic CorporationInventors: Kazuhiko NISHII, Hidezumi OKAMURA
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Patent number: 8344675Abstract: A rechargeable electric power tool includes a motor driven by a secondary battery, a switching element for regulating power distribution to the motor, a motor control unit for controlling rotation of the motor through the switching element, a lead wire for supplying a drive current to the motor therethrough and a trigger switch changed over by a user for turning on or off the drive current supplied to the motor through the lead wire. In the rechargeable electric power tool, upon changeover of the trigger switch, a microcomputer determines a magnitude relation between a detected temperature outputted from a first thermistor and a first temperature threshold value. If the detected temperature is determined to be greater than the first temperature threshold value, the microcomputer is set in a limited operation mode in which a revolution number of the motor is limited to a predetermined value or less.Type: GrantFiled: November 10, 2009Date of Patent: January 1, 2013Assignee: Panasonic Electric Works Power Tools Co., LtdInventors: Tatsuya Miwa, Atsumasa Kubota, Masaki Ikeda, Kazuhiko Nishii
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Patent number: 8084981Abstract: In a rechargeable electric power tool, upon changeover of a trigger switch, a microcomputer determines the magnitude relation between the detected temperature outputted from the first thermistor and the first temperature threshold value, the second temperature threshold value and the third temperature threshold value, and the magnitude relation between the first calculated temperature increase rate and the first preset temperature increase rate. If the detected temperature is determined to be greater than the first temperature threshold value or if the first calculated temperature increase rate is determined to be greater than the first preset temperature increase rate after the detected temperature has been determined to be greater than the second temperature threshold value, the microcomputer is set in a limited operation mode in which the revolution number of the motor is limited to a predetermined value or less.Type: GrantFiled: November 10, 2009Date of Patent: December 27, 2011Assignee: Panasonic Electric Works Power Tools Co., Ltd.Inventors: Tatsuya Miwa, Kazuhiko Nishii, Atsumasa Kubota, Kazuto Toyama, Masaki Ikeda
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Patent number: 7997352Abstract: An electric power tool includes a tool body and a battery pack removably mounted to the tool body. The battery pack is used as a power source of the tool body. The electric power tool further includes a lock unit for keeping the battery pack mounted to the tool body and an interrupter switch for interrupting the operation of the tool body when the lock unit does not keep the battery pack mounted to the tool body. Accordingly, the electric power tool is not operable when the battery pack is not completely mounted to the tool body.Type: GrantFiled: March 30, 2009Date of Patent: August 16, 2011Assignee: Panasonic Electric Works Co., Ltd.Inventors: Koichi Hashimoto, Kazuto Toyama, Kazuhiko Nishii, Tatsuya Miwa, Takechika Ishibashi
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Publication number: 20100117581Abstract: A rechargeable electric power tool includes a motor driven by a secondary battery, a switching element for regulating power distribution to the motor, a motor control unit for controlling rotation of the motor through the switching element, a lead wire for supplying a drive current to the motor therethrough and a trigger switch changed over by a user for turning on or off the drive current supplied to the motor through the lead wire. In the rechargeable electric power tool, upon changeover of the trigger switch, a microcomputer determines a magnitude relation between a detected temperature outputted from a first thermistor and a first temperature threshold value. If the detected temperature is determined to be greater than the first temperature threshold value, the microcomputer is set in a limited operation mode in which a revolution number of the motor is limited to a predetermined value or less.Type: ApplicationFiled: November 10, 2009Publication date: May 13, 2010Applicant: Panasonic Electric Works Power Tools Co., Ltd.Inventors: Tatsuya Miwa, Atsumasa Kubota, Masaki Ikeda, Kazuhiko Nishii
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Publication number: 20100117580Abstract: In a rechargeable electric power tool, upon changeover of a trigger switch, a microcomputer determines the magnitude relation between the detected temperature outputted from the first thermistor and the first temperature threshold value, the second temperature threshold value and the third temperature threshold value, and the magnitude relation between the first calculated temperature increase rate and the first preset temperature increase rate. If the detected temperature is determined to be greater than the first temperature threshold value or if the first calculated temperature increase rate is determined to be greater than the first preset temperature increase rate after the detected temperature has been determined to be greater than the second temperature threshold value, the microcomputer is set in a limited operation mode in which the revolution number of the motor is limited to a predetermined value or less.Type: ApplicationFiled: November 10, 2009Publication date: May 13, 2010Applicant: Panasonic Electric Works Power Tools Co., Ltd.Inventors: Tatsuya Miwa, Kazuhiko Nishii, Atsumasa Kubota, Kazuto Toyama, Masaki Ikeda
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Publication number: 20090242227Abstract: An electric power tool includes a tool body and a battery pack removably mounted to the tool body. The battery pack is used as a power source of the tool body. The electric power tool further includes a lock unit for keeping the battery pack mounted to the tool body and an interrupter switch for interrupting the operation of the tool body when the lock unit does not keep the battery pack mounted to the tool body. Accordingly, the electric power tool is not operable when the battery pack is not completely mounted to the tool body.Type: ApplicationFiled: March 30, 2009Publication date: October 1, 2009Applicant: Panasonic Electric Works Co., LtdInventors: Koichi Hashimoto, Kazuto Toyama, Kazuhiko Nishii, Tatsuya Miwa, Takechika Ishibashi
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Patent number: 5506256Abstract: Novel proline derivatives of the following formula (I) ##STR1## wherein each symbol is as defined in the specification, which specifically inhibit prolyl endopeptidase activity and can be used for the prevention and/or treatment of dementia and amnesia as agents which act directly on the central symptoms of dementia.Type: GrantFiled: February 26, 1993Date of Patent: April 9, 1996Assignees: Yoshitomi Pharmaceutical Industries, Ltd., Japan Tobacco Inc.Inventors: Koji Kobayashi, Kazuhiko Nishii, Kunio Iwata, Itsuo Uchida
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Patent number: 5118811Abstract: Amino acid derivatives of the formula ##STR1## wherein: Q is W--(CH.sub.2).sub.m --(A).sub.n --CO--B-- whereinA is oxygen atom or --NH--;B is ##STR2## or --(CH.sub.2).sub.l -- wherein X is sulfur atom or --CH.sub.2 --, and l is an integer from 1 to 3;W is ##STR3## wherein Hal is halogen atom; n is an integer of 0 or 1; andm is an integer from 0 to 3;Y is sulfur atom or --CH.sub.2 --; andR is hydrogen atom, formyl group, C.sub.1-5 alkoxycarbonyl group, --C.tbd.N or ##STR4## wherein R.sup.1 is hydrogen atom, andR.sup.2 is hydroxyl group, C.sub.1-5 alkylcarboxy group, phenylcarboxy group, C.sub.1-5 alkoxy group or phenyl C.sub.1-5 alkoxy group;with the proviso that when R is hydrogen atom, formyl group or C.sub.1-5 alkoxycarbonyl group, W is ##STR5## The compounds mentioned above specifically inhibit prolyl endopeptidase activity and are useful as agents for the treatment and prevention of dementia and amnesia.Type: GrantFiled: December 12, 1990Date of Patent: June 2, 1992Assignees: Japan Tobacco Inc., Yoshitomi Pharmaceutical Industries, Ltd.Inventors: Itsuo Uchida, Koji Kobayashi, Kazuhiko Nishii, Kunio Iwata, Shin Hara, Koretake Anami
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Patent number: 4712160Abstract: Disclosed herein is a power module which is simple in assembly and which allows efficient release of heat generated by a converter transformer and power devices on primary and secondary circuits which are electrically separated from each other. The power module is of a construction such that a converter transformer, a primary circuit board on one side of which a part of the primary circuit of a switching power supply unit is integrated, and a secondary circuit board on one side of which a part of the secondary circuit of the switching power supply unit is integrated are three-dimensionally joined into an integral module by a resin of high thermal conduction and electrical insulation properties, the device-mounted sides of the primary and secondary circuit boards facing each other. The transformer may be placed between the two circuit boards or, alternatively, in parallel and adjacent to the two circuit boards.Type: GrantFiled: June 30, 1986Date of Patent: December 8, 1987Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toshiaki Sato, Hisako Mori, Yashuhiko Horio, Kastumi Tabuchi, Nobuo Matsumoto, Kazuhiko Nishii