Patents by Inventor Yuta Ohmura
Yuta Ohmura 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: 10870141Abstract: Shock absorbers (33) are attached to a press apparatus (10). The press apparatus (10) has a lower die unit (11) and an upper die unit (21) that is movable in vertical directions; the lower die unit and the upper die unit are capable of cooperating with each other to perform press-forming on a blank (W). The upper die unit (21) has an upper forming die (22) that serves as a forming die to perform press-forming on the blank (W) and upper blank holders (25) that partially serve as blank holders. The shock absorbers (33) are respectively disposed between the upper forming die (22) and the upper blank holders (25), and when the upper die unit (21) is moved upward away from the lower die unit (11) to open the upper and lower forming dies after press-forming is performed on the blank (W), impact applied to the upper blank holders (25) by the upper forming die (22) are respectively absorbed by the shock absorbers (33).Type: GrantFiled: January 7, 2016Date of Patent: December 22, 2020Assignee: KOGANEI CORPORATIONInventor: Yuta Ohmura
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Publication number: 20180290196Abstract: Shock absorbers (33) are attached to a press apparatus (10). The press apparatus (10) has a lower die unit (11) and an upper die unit (21) that is movable in vertical directions; the lower die unit and the upper die unit are capable of cooperating with each other to perform press-forming on a blank (W). The upper die unit (21) has an upper forming die (22) that serves as a forming die to perform press-forming on the blank (W) and upper blank holders (25) that partially serve as blank holders. The shock absorbers (33) are respectively disposed between the upper forming die (22) and the upper blank holders (25), and when the upper die unit (21) is moved upward away from the lower die unit (11) to open the upper and lower forming dies after press-forming is performed on the blank (W), impact applied to the upper blank holders (25) by the upper forming die (22) are respectively absorbed by the shock absorbers (33).Type: ApplicationFiled: January 7, 2016Publication date: October 11, 2018Inventor: Yuta Ohmura
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Patent number: 9133943Abstract: A flow path switching valve has an injection side portion formed with an injection chamber and an outer valve seating surface, and a discharge side portion provided with a partition member formed with an inner valve seating surface. A discharge control block communicating with a discharge chamber is formed with a control flow path which is increased and decreased in volume by a discharge rod. To fill the control flow path with grease, a valve element closes an inner flow path and opens an outer flow path. On the other hand, to discharge the grease in the control flow path to the discharge chamber, the valve element closes the outer flow path and opens the inner flow path. After being supplied to the control flow path, the grease is supplied to the discharge chamber.Type: GrantFiled: September 4, 2012Date of Patent: September 15, 2015Assignees: Koganei Corporation, Canon KabushikiInventors: Yuta Ohmura, Youhei Edagawa, Susumu Murata
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Patent number: 8839919Abstract: A shock absorber is attached coaxially with a reciprocating rod driven by a reciprocating unit for absorbing an impact force without bending the reciprocating rod. The shock absorber has a hollow rod provided with a through hole. The hollow rod is mounted within an outer cylindrical body. An accommodating space is formed between the hollow rod and the outer cylindrical body. A spring force toward one end portion side of the hollow rod is applied to the outer cylindrical body by a compression coil spring. An annular piston provided in the hollow rod partitions the accommodating space into two liquid chambers. When the impact force is applied to the hollow rod, the liquid flows from one liquid chamber to another liquid chamber through a gap, whereby a resistance force is applied to the hollow rod.Type: GrantFiled: August 3, 2012Date of Patent: September 23, 2014Assignee: Koganei CorporationInventors: Akiyoshi Horikawa, Yuta Ohmura
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Patent number: 8584817Abstract: A shock absorber is attached coaxially with a reciprocating rod driven by a reciprocating unit to prevent a bending moment from being applied to the reciprocating rod in absorbing an impact force. The shock absorber has a hollow rod and an outer cylindrical body mounted axially movably relatively to and outside the hollow rod. An accommodating space is formed between the hollow rod and the outer cylindrical body. The hollow rod carries an annular piston, which partitions the accommodating space into two liquid chambers. A compression spring biases the outer cylindrical body toward one end of the hollow rod. When an impact forces the outer cylindrical body toward the other end of the hollow rod, liquid flows from one of the liquid chambers to the other through a gap, so that a resistance force is applied to the annular piston.Type: GrantFiled: April 5, 2012Date of Patent: November 19, 2013Assignee: Koganei CorporationInventors: Akiyoshi Horikawa, Yuta Ohmura
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Publication number: 20130068330Abstract: A flow path switching valve has an injection side portion formed with an injection chamber and an outer valve seating surface, and a discharge side portion provided with a partition member formed with an inner valve seating surface. A discharge control block communicating with a discharge chamber is formed with a control flow path which is increased and decreased in volume by a discharge rod. To fill the control flow path with grease, a valve element closes an inner flow path and opens an outer flow path. On the other hand, to discharge the grease in the control flow path to the discharge chamber, the valve element closes the outer flow path and opens the inner flow path. After being supplied to the control flow path, the grease is supplied to the discharge chamber.Type: ApplicationFiled: September 4, 2012Publication date: March 21, 2013Applicants: CANON KABUSHIKI KAISHA, KOGANEI CORPORATIONInventors: Yuta Ohmura, Youhei Edagawa, Susumu Murata
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Patent number: 8342301Abstract: A shock absorber is attached coaxially with a reciprocating rod driven by a reciprocating unit to prevent a bending moment from being applied to the reciprocating rod in absorbing an impact force. The shock absorber has a hollow rod provided with a through hole and an outer cylindrical body mounted outside the hollow rod so as to be movable axially relatively and attached to the reciprocating unit. An accommodating space is formed between the hollow rod and the outer cylindrical body. A spring force in a direction of being relatively directed to one end portion side of the hollow rod is applied to the outer cylindrical body by a compression coil spring. An annular piston for partitioning an accommodating space into two liquid chambers is provided in the hollow rod. When the impact force is applied to the hollow rod so as to be slid to the hollow rod, the liquid flows from one liquid chamber to another liquid chamber through a gap, whereby a resistance force is applied to the annular piston.Type: GrantFiled: March 1, 2007Date of Patent: January 1, 2013Assignee: Koganei CorporationInventors: Akiyoshi Horikawa, Yuta Ohmura
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Publication number: 20120326367Abstract: A shock absorber is attached coaxially with a reciprocating rod driven by a reciprocating unit for absorbing an impact force without bending the reciprocating rod. The shock absorber has a hollow rod provided with a through hole. The hollow rod is mounted within an outer cylindrical body. An accommodating space is formed between the hollow rod and the outer cylindrical body. A spring force toward one end portion side of the hollow rod is applied to the outer cylindrical body by a compression coil spring. An annular piston provided in the hollow rod partitions the accommodating space into two liquid chambers. When the impact force is applied to the hollow rod, the liquid flows from one liquid chamber to another liquid chamber through a gap, whereby a resistance force is applied to the hollow rod.Type: ApplicationFiled: August 3, 2012Publication date: December 27, 2012Applicant: Koganei CorporationInventors: Akiyoshi Horikawa, Yuta Ohmura
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Publication number: 20120241266Abstract: A shock absorber is attached coaxially with a reciprocating rod driven by a reciprocating unit to prevent a bending moment from being applied to the reciprocating rod in absorbing an impact force. The shock absorber has a hollow rod and an outer cylindrical body mounted axially movably relatively to and outside the hollow rod. An accommodating space is formed between the hollow rod and the outer cylindrical body. The hollow rod carries an annular piston, which partitions the accommodating space into two liquid chambers. A compression spring biases the outer cylindrical body toward one end of the hollow rod. When an impact forces the outer cylindrical body toward the other end of the hollow rod, liquid flows from one of the liquid chambers to the other through a gap, so that a resistance force is applied to the annular piston.Type: ApplicationFiled: April 5, 2012Publication date: September 27, 2012Applicant: KOGANEI CORPORATIONInventors: Akiyoshi Horikawa, Yuta Ohmura
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Patent number: 8181756Abstract: A shock absorber is attached coaxially with a reciprocating rod driven by a reciprocating unit to prevent a bending moment from being applied to the reciprocating rod in absorbing an impact force. The shock absorber has a hollow rod and an outer cylindrical body mounted axially movably relatively to and outside the hollow rod. An accommodating space is formed between the hollow rod and the outer cylindrical body. A spring force in a direction of being relatively directed to one end portion side of the hollow rod is applied by a compression spring to the outer cylindrical body. The hollow rod is provided with an annular piston which partitions the accommodating space into two liquid chambers. When an impact force in a direction of being relatively directed to the other end side of the hollow rod is applied to the outer cylindrical body, liquid flows from one of the liquid chambers to the other through a gap, so that a resistance force is applied to the annular piston.Type: GrantFiled: March 1, 2007Date of Patent: May 22, 2012Assignee: Koganei CorporationInventors: Akiyoshi Horikawa, Yuta Ohmura
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Publication number: 20090223762Abstract: A shock absorber with a possible minimum peak value of the impact acceleration during a collision. The shock absorber includes a tubular cylinder part with an opening at one end and the other end closed, a seal part configured to seal the internal space of this cylinder part at a part closer to this one end inside this cylinder part, fluid filled in the enclosed space formed by this seal part inside this cylinder part, a slidable piston part inside this enclosed space, and a rod part that slidably penetrates this seal part concentrically and is connected to this piston part at one end while projecting out to the other side. This cylinder part has a tapered inner surface inside this enclosed space, reducing its internal diameter from the one end to the other end, and the rate of this taper is within the range from 1/50 to 1/130.Type: ApplicationFiled: February 9, 2006Publication date: September 10, 2009Applicant: Koganei CorporationInventors: Akiyoshi Horikawa, Yuta Ohmura
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Publication number: 20070205065Abstract: A shock absorber is attached coaxially with a reciprocating rod driven by a reciprocating unit to prevent a bending moment from being applied to the reciprocating rod in absorbing an impact force. The shock absorber has a hollow rod provided with a through hole and an outer cylindrical body mounted outside the hollow rod so as to be movable axially relatively and attached to the reciprocating unit. An accommodating space is formed between the hollow rod and the outer cylindrical body. A spring force in a direction of being relatively directed to one end portion side of the hollow rod is applied to the outer cylindrical body by a compression coil spring. An annular piston for partitioning an accommodating space into two liquid chambers is provided in the hollow rod. When the impact force is applied to the hollow rod so as to be slid to the hollow rod, the liquid flows from one liquid chamber to another liquid chamber through a gap, whereby a resistance force is applied to the annular piston.Type: ApplicationFiled: March 1, 2007Publication date: September 6, 2007Applicant: Koganei CorporationInventors: Akiyoshi Horikawa, Yuta Ohmura
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Publication number: 20070205064Abstract: A shock absorber is attached coaxially with a reciprocating rod driven by a reciprocating unit to prevent a bending moment from being applied to the reciprocating rod in absorbing an impact force. The shock absorber has a hollow rod and an outer cylindrical body mounted axially movably relatively to and outside the hollow rod. An accommodating space is formed between the hollow rod and the outer cylindrical body. A spring force in a direction of being relatively directed to one end portion side of the hollow rod is applied by a compression spring to the outer cylindrical body. The hollow rod is provided with an annular piston which partitions the accommodating space into two liquid chambers. When an impact force in a direction of being relatively directed to the other end side of the hollow rod is applied to the outer cylindrical body, liquid flows from one of the liquid chambers to the other through a gap, so that a resistance force is applied to the annular piston.Type: ApplicationFiled: March 1, 2007Publication date: September 6, 2007Applicant: Koganei CorporationInventors: Akiyoshi Horikawa, Yuta Ohmura