Patents by Inventor Hidefumi Hiramatsu
Hidefumi Hiramatsu 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: 10711437Abstract: A bypass line (35) having one end side connected to a pilot delivery line (23) between a pilot pump (16) and a throttle (32) and the other end side connected to the pilot delivery line (23) between a check valve (33) and a pressure reducing valve type pilot valve (25) so as to bypass the throttle (32), a gate lock valve (27), and the check valve (33) provided in order from a pilot pump (16) is provided in the pilot delivery line (23). A lock switching valve (36) shutting down a flow of a pilot pressure oil from the pilot pump (16) through the bypass line (35) at a normal time and allowing the flow of the pilot pressure oil through the bypass line (35) when a pressure generated in the pilot delivery line (23) exceeds a predetermined pressure between the gate lock valve (27) and the check valve (33) is provided in the bypass line (35).Type: GrantFiled: December 26, 2017Date of Patent: July 14, 2020Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hitoshi Nishiguchi, Hidefumi Hiramatsu, Tsuyoshi Onozaki
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Publication number: 20190352883Abstract: A bypass line (35) having one end side connected to a pilot delivery line (23) between a pilot pump (16) and a throttle (32) and the other end side connected to the pilot delivery line (23) between a check valve (33) and a pressure reducing valve type pilot valve (25) so as to bypass the throttle (32), a gate lock valve (27), and the check valve (33) provided in order from a pilot pump (16) is provided in the pilot delivery line (23). A lock switching valve (36) shutting down a flow of a pilot pressure oil from the pilot pump (16) through the bypass line (35) at a normal time and allowing the flow of the pilot pressure oil through the bypass line (35) when a pressure generated in the pilot delivery line (23) exceeds a predetermined pressure between the gate lock valve (27) and the check valve (33) is provided in the bypass line (35).Type: ApplicationFiled: December 26, 2017Publication date: November 21, 2019Inventors: Hitoshi NISHIGUCHI, Hidefumi HIRAMATSU, Tsuyoshi ONOZAKI
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Patent number: 9181675Abstract: A working mechanism (4) takes a traveling stance by a way that left and right boom cylinders (9, 10) are expanded to rotate a tip end of a first boom (5) to the rear side and a positioning cylinder (11) is compressed to rotate a tip end of a second boom (6) to the lower side. In the traveling stance of the working mechanism (4), a front surface plate (23A) of a right front housing cover (23) is inclined along a tilting angle (?) of the left and right boom cylinders (9, 10), and the front surface plate (23A) of the right front housing cover (23) is arranged in a position of lining with front ends (9A1, 10A1) of tubes (9A, 10A) in the left-right direction forming the respective boom cylinders (9, 10).Type: GrantFiled: April 25, 2012Date of Patent: November 10, 2015Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Tsuyoshi Ueki, Yukihiro Tatsuno, Hidefumi Hiramatsu
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Patent number: 9016418Abstract: A right front housing cover is arranged in the right side of a working mechanism, and a first control valve is arranged in a front portion side of a valve accommodation room that is covered with the right front housing cover. Further, a signal control valve block is arranged in the back side of the first control valve and in the upper side of the first control valve, and a solenoid valve is arranged in the back side of the signal control valve block. A front surface plate forming part of the right front housing cover has a lower side is inclined in an oblique downward direction toward the forward side, and is arranged along a virtual line that extends in an oblique downward direction through a front end portion of the first control valve and a front end portion of the signal control valve block.Type: GrantFiled: November 6, 2012Date of Patent: April 28, 2015Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Kakurou Ootsuka, Hidefumi Hiramatsu, Tsuyoshi Ueki
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Publication number: 20140186151Abstract: A right front housing cover is arranged in the right side of a working mechanism, and a first control valve is arranged in a front portion side of a valve accommodation room that is covered with the right front housing cover. Further, a signal control valve block is arranged in the back side of the first control valve and in the upper side of the first control valve, and a solenoid valve is arranged in the back side of the signal control valve block. A front surface plate forming part of the right front housing cover has a lower side is inclined in an oblique downward direction toward the forward side, and is arranged along a virtual line that extends in an oblique downward direction through a front end portion of the first control valve and a front end portion of the signal control valve block.Type: ApplicationFiled: November 6, 2012Publication date: July 3, 2014Applicant: Hitachi Constuction Machinery Co., Ltd.Inventors: Kakurou Ootsuka, Hidefumi Hiramatsu, Tsuyoshi Ueki
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Publication number: 20130323001Abstract: A working mechanism (4) takes a traveling stance by a way that left and right boom cylinders (9, 10) are expanded to rotate a tip end of a first boom (5) to the rear side and a positioning cylinder (11) is compressed to rotate a tip end of a second boom (6) to the lower side. In the traveling stance of the working mechanism (4), a front surface plate (23A) of a right front housing cover (23) is inclined along a tilting angle (?) of the left and right boom cylinders (9, 10), and the front surface plate (23A) of the right front housing cover (23) is arranged in a position of lining with front ends (9A1, 10A1) of tubes (9A, 10A) in the left-right direction forming the respective boom cylinders (9, 10).Type: ApplicationFiled: April 25, 2012Publication date: December 5, 2013Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Tsuyoshi Ueki, Yukihiro Tatsuno, Hidefumi Hiramatsu
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Publication number: 20110294692Abstract: There is disclosed herein composition, methods and uses relating to miR-126 as a measure of engraftment potential of a population of hematopoietic stem cells (HSCs), as a method of purifying HSCs and in the monitoring or treatment of acute myeloid leukemia.Type: ApplicationFiled: November 6, 2009Publication date: December 1, 2011Inventors: John Dick, Eric Lechman, Kristin Hope, Hidefumi Hiramatsu
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Publication number: 20110219757Abstract: A muffler draining apparatus for a working machine is provided which allows a drain line having excellent heat resistance to be reliably installed, even when a device or equipment is present at the position below a muffler. In a muffler draining apparatus that is provided to a muffler equipped to a hydraulic excavator, and includes a drain line that discharges water accumulated in the muffler to the outside of a vehicle body, the above-described drain line includes a single metal tubing whose one end is connected to the muffler, and whose intermediate portion provided continuous to the one end is extended into the space formed between the muffler and a hydraulic pump located below the muffler. The intermediate portion of the metal tubing includes a single linear portion and plural bent portions. Also, the muffler draining apparatus includes, for example, a single support bracket that is fixed to the muffler, and supports the intermediate portion of the metal tubing.Type: ApplicationFiled: March 10, 2011Publication date: September 15, 2011Applicant: Hitachi Construction Machinery Co., Ltd.Inventors: Tomoyuki SAITO, Toshihiro Abe, Hiroki Sugawara, Hidefumi Hiramatsu, Hiroyuki Kamata
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Patent number: D692028Type: GrantFiled: April 10, 2013Date of Patent: October 22, 2013Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Kazuhiko Hiraoka, Tsuyoshi Ueki, Yukihiro Tatsuno, Hidefumi Hiramatsu
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Patent number: D693857Type: GrantFiled: April 10, 2013Date of Patent: November 19, 2013Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Kazuhiko Hiraoka, Tsuyoshi Ueki, Yukihiro Tatsuno, Hidefumi Hiramatsu
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Patent number: D915470Type: GrantFiled: September 26, 2019Date of Patent: April 6, 2021Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Atsushi Ninomiya, Yusuke Daimon, Katsumi Usami, Hiroyuki Kamata, Hidefumi Hiramatsu, Takeo Manabe, Ei Takahashi
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Patent number: D969173Type: GrantFiled: September 26, 2019Date of Patent: November 8, 2022Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Atsushi Ninomiya, Yusuke Daimon, Hidefumi Hiramatsu, Takeo Manabe, Ei Takahashi