Patents by Inventor Katsumi Tamura
Katsumi Tamura 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: 9435392Abstract: A parking brake control device for a transport vehicle is attached to a vehicle body including a parking brake (17) of a negative control type for maintaining a state in which rotation of wheels is stopped, the parking brake control device including a control unit (32) for controlling movement of a spool (21) for magnetizing or demagnetizing a solenoid valve (25) to release or actuate the parking brake (17). The control unit (32) includes a stop determining section (33) that determines whether the vehicle body stops traveling, an actuation command section (34) that actuates the parking brake (17) when the stop determining section (33) determines that the vehicle body is stopped, and a release command section (35) that releases the parking brake (17) after elapse of a preset setting time after the actuation of the parking brake (17) is started by the actuation command section (34).Type: GrantFiled: November 30, 2012Date of Patent: September 6, 2016Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Toshikazu Minoshima, Katsumi Tamura, Takao Kurosawa, Yudai Itai
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Publication number: 20140374199Abstract: A parking brake control device for a transport vehicle is attached to a vehicle body including a parking brake (17) of a negative control type for maintaining a state in which rotation of wheels is stopped, the parking brake control device including a control unit (32) for controlling movement of a spool (21) for magnetizing or demagnetizing a solenoid valve (25) to release or actuate the parking brake (17). The control unit (32) includes a stop determining section (33) that determines whether the vehicle body stops traveling, an actuation command section (34) that actuates the parking brake (17) when the stop determining section (33) determines that the vehicle body is stopped, and a release command section (35) that releases the parking brake (17) after elapse of a preset setting time after the actuation of the parking brake (17) is started by the actuation command section (34).Type: ApplicationFiled: November 30, 2012Publication date: December 25, 2014Applicant: Hitachi Construction Machinery Co., Ltd.Inventors: Toshikazu Minoshima, Katsumi Tamura, Takao Kurosawa, Yudai Itai
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Patent number: 8840189Abstract: In case a burden is discharged from a vessel (3), the vessel (3) is raised obliquely backward with respect to a vehicle body (2) by a hoist cylinder (10). However, when discharging work is stopped on the way, the vessel (3) is temporarily lowered to a position at which this sits on the vehicle body (2). When the vessel (3) lowers, a weight of the burden left loaded thereon acts on the hoist cylinder (10) as a load in addition to the weight of the vessel (3). A controller (35) determines whether the vessel (3) lowers in a burden loading state based on various detection signals. When the vessel (3) lowers in the burden loading state, switching of directional control valves (20) and (21) is controlled so as to decrease a contracting speed of the hoist cylinder (10), thereby prevent the vessel (3) from colliding against the vehicle body (2).Type: GrantFiled: December 9, 2010Date of Patent: September 23, 2014Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Toshikazu Minoshima, Michio Fushiki, Katsumi Tamura, Takao Kurosawa
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Patent number: 8731787Abstract: A control valve device comprises two direction control valves. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. When a hoist cylinder is telescopically operated to raise or lower a vessel, as the hoist cylinder approaches a stop position, a controller determines that the hoist cylinder gets close to the stop position. Based upon this determination, the controller variably adjusts a flow passage area of the direction control valve using the variable throttle portions or variably adjusts a flow passage area of the direction control valve using the variable throttle portions in such a manner as to slow down or speed up the telescopic speed of the hoist cylinder corresponding to the weight in the side of vessel.Type: GrantFiled: March 29, 2011Date of Patent: May 20, 2014Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Katsumi Tamura, Toshikazu Minoshima, Michio Fushiki, Takao Kurosawa
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Patent number: 8668044Abstract: There is provided a circulation line (39) for circulating pressurized oil from an accumulator (11) into a housing (15) of a steering valve (14). An orifice joint (41) is provided along the path of the circulation line (39). The orifice joint (41) is removably mounted on the housing (15) of the steering valve (14) from outside. An orifice portion (42) of the orifice joint (41) applies a throttling function to the circulating oil liquid whereby a frictional heat is generated therein. The oil liquid in a warm state flows through a communication passage (21), passages in a spool valve (16), and a low pressure side passage (18B), thus enabling the steering valve (14) to be always in a warm state.Type: GrantFiled: July 1, 2010Date of Patent: March 11, 2014Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Katsumi Tamura, Kazumasa Horii, Knud Jensen Meldgaard
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Publication number: 20130035828Abstract: A control valve device comprises two direction control valves. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. When a hoist cylinder is telescopically operated to raise or lower a vessel, as the hoist cylinder (10) approaches a stop position, a controller determines that the hoist cylinder gets close to the stop position. Based upon this determination, the controller variably adjusts a flow passage area of the direction control valve using the variable throttle portions or variably adjusts a flow passage area of the direction control valve using the variable throttle portions in such a manner as to slow down or speed up the telescopic speed of the hoist cylinder corresponding to the weight in the side of vessel.Type: ApplicationFiled: March 29, 2011Publication date: February 7, 2013Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Katsumi Tamura, Toshikazu Minoshima, Michio Fushiki, Takao Kurosawa
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Publication number: 20120274121Abstract: In case a burden is discharged from a vessel (3), the vessel (3) is raised obliquely backward with respect to a vehicle body (2) by a hoist cylinder (10). However, when discharging work is stopped on the way, the vessel (3) is temporarily lowered to a position at which this sits on the vehicle body (2). When the vessel (3) lowers, a weight of the burden left loaded thereon acts on the hoist cylinder (10) as a load in addition to the weight of the vessel (3). A controller (35) determines whether the vessel (3) lowers in a burden loading state based on various detection signals. When the vessel (3) lowers in the burden loading state, switching of directional control valves (20) and (21) is controlled so as to decrease a contracting speed of the hoist cylinder (10), thereby prevent the vessel (3) from colliding against the vehicle body (2).Type: ApplicationFiled: December 9, 2010Publication date: November 1, 2012Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Toshikazu Minoshima, Michio Fushiki, Katsumi Tamura, Takao Kurosawa
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Publication number: 20110308882Abstract: There is provided a circulation line (39) for circulating pressurized oil from an accumulator (11) into a housing (15) of a steering valve (14). An orifice joint (41) is provided along the path of the circulation line (39). The orifice joint (41) is removably mounted on the housing (15) of the steering valve (14) from outside. An orifice portion (42) of the orifice joint (41) applies a throttling function to the circulating oil liquid whereby a frictional heat is generated therein. The oil liquid in a warm state flows through a communication passage (21), passages in a spool valve (16), and a low pressure side passage (18B), thus enabling the steering valve (14) to be always in a warm state.Type: ApplicationFiled: July 1, 2010Publication date: December 22, 2011Applicants: SAUER-DANFOSS-DAIKIN LTD., HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Katsumi Tamura, Kazumasa Horii, Knud Jensen Meldgaard
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Patent number: 8042876Abstract: A branch line branching from midway of a hydraulic conduit or each of actuator side oil passages to connect a bottom side oil chamber of a hoist cylinder to a tank is provided to the hydraulic conduit or each of the actuator side oil passages. A manual operation valve for variably adjusting the flow rate in accordance with the operation of a lever handle is provided in the branch line. Maintenance work is performed with an engine stopped in this state. Subsequently, when a vessel is lowered onto a vehicle body, hydraulic oil can be discharged through the branch line from the bottom side oil chamber of the hoist cylinder to the tank by opening the manual operation valve, so that the hoist cylinder can be automatically contracted.Type: GrantFiled: February 24, 2009Date of Patent: October 25, 2011Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Katsumi Tamura, Satoru Kaneko
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Publication number: 20090218875Abstract: A branch line branching from midway of a hydraulic conduit or each of actuator side oil passages to connect a bottom side oil chamber of a hoist cylinder to a tank is provided to the hydraulic conduit or each of the actuator side oil passages. A manual operation valve for variably adjusting the flow rate in accordance with the operation of a lever handle is provided in the branch line. Maintenance work is performed with an engine stopped in this state. Subsequently, when a vessel is lowered onto a vehicle body, hydraulic oil can be discharged through the branch line from the bottom side oil chamber of the hoist cylinder to the tank by opening the manual operation valve, so that the hoist cylinder can be automatically contracted.Type: ApplicationFiled: February 24, 2009Publication date: September 3, 2009Inventors: Katsumi TAMURA, Satoru Kaneko
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Patent number: 6731364Abstract: A liquid crystal display device has image signal lines of a bottom gate type TFT, in which the image signal lines comprise a laminated film formed of a first conductive film disposed as a lower layer and a second conductive film disposed as an upper layer. The first conductive film is made of an alloy comprising Mo as a main ingredient and W, and the second conductive film is made of an alloy comprising Mo as a main ingredient and Zr. The device is capable of satisfying requirements of reduced resistance, improved dry etching resistance, selective wet etching with respect to the gate insulative film, the number of laminated layer of two or less, and tapered fabrication for the cross section.Type: GrantFiled: March 20, 2002Date of Patent: May 4, 2004Assignee: Hitachi, Ltd.Inventors: Takuya Takahashi, Toshiki Kaneko, Katsumi Tamura, Kenichi Onisawa
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Liquid crystal display units with data line being formed of molybdenum alloy having chromium content
Patent number: 6707512Abstract: A liquid crystal display unit having one pair of substrates, a liquid crystal layer held between the pair of substrates, a plurality of scanning lines formed on one of the pair of substrates, a plurality of data lines which cross the scanning lines in matrix form, thin film transistors formed near the crossing points of the scanning lines and data lines, and pixel electrodes connected to the thin film transistors. A source electrode and a drain electrode of each thin film transistor, and each data line, are made of a molybdenum alloy having a chromium content in a range of 1.5 weight % to 5 weight %.Type: GrantFiled: February 11, 2003Date of Patent: March 16, 2004Assignee: Hitachi, Ltd.Inventors: Takuya Takahashi, Masahiro Ishii, Tsutomu Kasai, Tetsuya Kawamura, Katsumi Tamura, Toshiki Kaneko, Kenichi Onisawa -
Publication number: 20040047962Abstract: The present invention relates to a highly nutritious baked food product having ingredients similar to conventional baked food products but having a nutritionally balanced high protein content and low fat content, with an improved level of the hardness that conventionally results from a high protein content and low fat content. The highly nutritious baked food product can be produced by baking a dough containing 10-20 wt. % of protein, 7-14 wt. % of fat and 55-81 wt. % of sugar, with trehalose contained as a sugar component in 1 to 10 wt. % relative to the total weight of the solid ingredients.Type: ApplicationFiled: June 26, 2003Publication date: March 11, 2004Inventors: Akihisa Takaichi, Toshihiko Okamoto, Yoshihide Azuma, Katsumi Tamura, Hisashi Hagita, Izumi Hanya
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Patent number: 6628361Abstract: A wiring structure is provided, the wiring structure being formed by forming a laminated film of silver (Ag) or an alloy containing silver (Ag) as the major constituent and the other metallic material, and by forming a wiring pattern through a single process of photolithography.Type: GrantFiled: February 23, 2001Date of Patent: September 30, 2003Assignee: Hitachi, Ltd.Inventors: Takuya Takahashi, Yoichi Sakaki, Isao Ikuta, Katsumi Tamura, Ken-ichi Onisawa
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Publication number: 20030147020Abstract: A liquid crystal display unit having one pair of substrates, a liquid crystal layer held between the pair of substrates, a plurality of scanning lines formed on one of the pair of substrates, a plurality of data lines which cross the scanning lines in matrix form, thin film transistors formed near the crossing points of the scanning lines and data lines, and pixel electrodes connected to the thin film transistors. A source electrode and a drain electrode of each thin film transistor, and each data line, are made of a molybdenum alloy having a chromium content in a range of 1.5 weight % to 5 weight %.Type: ApplicationFiled: February 11, 2003Publication date: August 7, 2003Inventors: Takuya Takahashi, Masahiro Ishii, Tsutomu Kasai, Tetsuya Kawamura, Katsumi Tamura, Toshiki Kaneko, Kenichi Onisawa
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Publication number: 20030112382Abstract: A liquid crystal display device in which at least one of the scanning line GL, data line DL, source and drain electrodes SD1, SD2 of the thin film transistor TFT comprises a laminated film containing a first electroconductive film and a second electroconductive film, the first electroconductive film being made of a molybdenum-based Mo alloy and the second electroconductive film being made of a silver-based Ag alloy and disposed on the first electroconductive film, can be produced at low cost.Type: ApplicationFiled: September 20, 2001Publication date: June 19, 2003Inventors: Takuya Takahashi, Isao Ikuta, Katsumi Tamura, Youichi Sakaki, Ken-Ichi Onisawa, Masahiko Ando
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Publication number: 20030063229Abstract: A liquid crystal display device having image signal lines of a bottom gate type TFT in which image signal lines comprise a laminated film of a first conductive film as a lower layer and a second conductive film as an upper layer, the first conductive film being made of an alloy comprising Mo as a main ingredient and W and the second conductive film being made of an alloy comprising Mo as a main ingredient and Zr. The device is capable of satisfying requirements of reduced resistance, improved dry etching resistance, selective wet etching with respect to the gate insulative film, the number of laminated layer of two or less and tapered fabrication for the cross section.Type: ApplicationFiled: March 20, 2002Publication date: April 3, 2003Inventors: Takuya Takahashi, Toshiki Kaneko, Katsumi Tamura, Kenichi Onisawa
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Patent number: 6522370Abstract: A liquid crystal display unit is used that has data lines made of a molybdenum-alloyed film having a chromium content from 2 wt. % or more, but up to 5 wt. %, or a molybdenum-alloyed film lamination (Mo—Cr) consisting of a first electroconductive film and a second electroconductive film, with the first electroconductive film having a chromium content from 2 wt. % or more, but up to 5 wt. % and the second electroconductive film being provided above the first electroconductive film and containing less chromium than the first electroconductive film does. The use of the data lines composed of these materials enables the following requirements to be satisfied: high dry-etching resistance, low resistance, low ACF contact resistance, low side etching rates, forward tapered wiring cross-sectional shape, and up to two lamination layers.Type: GrantFiled: March 20, 2001Date of Patent: February 18, 2003Assignee: Hitachi, Ltd.Inventors: Takuya Takahashi, Masahiro Ishii, Tsutomu Kasai, Tetsuya Kawamura, Katsumi Tamura, Toshiki Kaneko, Kenichi Onisawa
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Patent number: 6462802Abstract: A wiring of a liquid crystal display device is made of a lamination film including a first layer of Nb or alloy containing Nb as its main component and a second layer of nitride of Nb or alloy containing Nb as its main component. A liquid crystal display device having such a wiring provides a wiring structure excellent in resistance to thermal oxidation.Type: GrantFiled: January 19, 1999Date of Patent: October 8, 2002Assignee: Hitachi, Ltd.Inventors: Etsuko Nishimura, Genshiro Kawachi, Kenichi Onisawa, Kenichi Chahara, Takeshi Sato, Katsumi Tamura
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Patent number: 6433842Abstract: The method of fabrication of a liquid crystal display device includes the steps of: forming a metal thin film on a glass substrate; forming a resist pattern on the metal thin film by photolithography; and wet-etching the metal thin film with an etchant formed of a mixture including phosphoric acid, nitric acid in a range between 7 mol % and 12 mol % inclusive, and at least one of ammonium fluoride and hydrogen fluoride in a trace amount of about 0.01 to 0.1 mol %.Type: GrantFiled: March 29, 2000Date of Patent: August 13, 2002Assignee: Hitachi, Ltd.Inventors: Toshiki Kaneko, Masaru Takabatake, Takahiro Ochiai, Takuya Takahashi, Katsumi Tamura, Kenichi Onisawa, Kenichi Cyahara, Masatomo Terakado, Yuichi Harano, Hideaki Yamamoto