Patents by Inventor Takehiko YANAGIYA
Takehiko YANAGIYA 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: 11826938Abstract: An injection piston drives a screw. An injection hydraulic cylinder drives the injection piston and is partitioned into first and second chambers. A first oil discharge port is disposed in the injection hydraulic cylinder to be blocked by a piston part when the piston part of the injection piston advances to a pressure-holding switching position, and discharges hydraulic oil from the second chamber. A second oil discharge port is disposed in the injection hydraulic cylinder to be capable of discharging hydraulic oil from the second chamber regardless of the position of the injection piston. The injection piston has first and second members. The joint of the first and second members is disposed at a position separated from an end of the piston part on a side of the second chamber by a predetermined distance.Type: GrantFiled: July 8, 2021Date of Patent: November 28, 2023Assignee: THE JAPAN STEEL WORKS, LTD.Inventors: Takehiko Yanagiya, Yutaka Nakagawa, Chikara Kawabe, Takahiro Sugahara
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Patent number: 11597006Abstract: An injection piston can be driven along an axial direction of a heating barrel. The injection piston is connected to a screw and drives the screw along the axial direction. An injection hydraulic cylinder drives the injection piston in the axial direction by pressure of hydraulic oil. Inside of the injection hydraulic cylinder being partitioned into a first chamber and a second chamber. An oil discharge port is provided in the injection hydraulic cylinder and discharges the hydraulic oil from the second chamber. A first valve is inserted in a path for discharging the hydraulic oil discharged from the second chamber. A second valve opens when the pressure of the provided oil is higher than a first threshold value. The first valve closes when the pressure of the hydraulic oil supplied through the second valve is applied to the first valve.Type: GrantFiled: March 21, 2022Date of Patent: March 7, 2023Assignee: THE JAPAN STEEL WORKS, LTD.Inventors: Takehiko Yanagiya, Yutaka Nakagawa, Yusuke Sugimori
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Publication number: 20220324015Abstract: An injection piston can be driven along an axial direction of a heating barrel. The injection piston is connected to a screw and drives the screw along the axial direction. An injection hydraulic cylinder drives the injection piston in the axial direction by pressure of hydraulic oil. Inside of the injection hydraulic cylinder being partitioned into a first chamber and a second chamber. An oil discharge port is provided in the injection hydraulic cylinder and discharges the hydraulic oil from the second chamber. A first valve is inserted in a path for discharging the hydraulic oil discharged from the second chamber. A second valve opens when the pressure of the provided oil is higher than a first threshold value. The first valve closes when the pressure of the hydraulic oil supplied through the second valve is applied to the first valve.Type: ApplicationFiled: March 21, 2022Publication date: October 13, 2022Inventors: Takehiko YANAGIYA, Yutaka NAKAGAWA, Yusuke SUGIMORI
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Patent number: 11267177Abstract: A flange is formed on a heating cylinder in a vicinity of a center in a longitudinal direction and a predetermined joining plate adheres to the flange. A flange plate is provided on a support frame. The joining plate is fixed to the flange plate to attach and detach freely, and the heating cylinder is caused to be supported by the support frame. Accordingly, movement in an axial direction and rotation of the heating cylinder are restricted. A guide portion for positioning during attachment and detachment is provided on one or both of the joining plate and the flange plate.Type: GrantFiled: November 19, 2019Date of Patent: March 8, 2022Assignee: THE JAPAN STEEL WORKS. LTD.Inventors: Takehiko Yanagiya, Toshio Toyoshima, Yutaka Nakagawa
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Publication number: 20220032520Abstract: An injection piston drives a screw. An injection hydraulic cylinder drives the injection piston and is partitioned into first and second chambers. A first oil discharge port is disposed in the injection hydraulic cylinder to be blocked by a piston part when the piston part of the injection piston advances to a pressure-holding switching position, and discharges hydraulic oil from the second chamber. A second oil discharge port is disposed in the injection hydraulic cylinder to be capable of discharging hydraulic oil from the second chamber regardless of the position of the injection piston. The injection piston has first and second members. The joint of the first and second members is disposed at a position separated from an end of the piston part on a side of the second chamber by a predetermined distance.Type: ApplicationFiled: July 8, 2021Publication date: February 3, 2022Inventors: Takehiko YANAGIYA, Yutaka NAKAGAWA, Chikara KAWABE, Takahiro SUGAHARA
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Publication number: 20210299926Abstract: A screw can be driven along an axial direction of a heating barrel and rotatable. An injection piston drives the screw along the axial direction. An injection hydraulic cylinder is partitioned into a first chamber in which pressured hydraulic oil for driving the injection piston is supplied and a second chamber from which hydraulic oil is discharged, and drives the injection piston in the axial direction by hydraulic pressure. A first oil discharge port is blocked by the injection piston when the injection piston advances to a holding pressure switching position. A second oil discharge port can discharge the hydraulic oil from the front chamber regardless of the position of the injection piston. The first oil discharge port is disposed at a position opposed to the first oil discharge port across a center axis of the injection hydraulic cylinder, and is connected to the first oil discharge port.Type: ApplicationFiled: March 10, 2021Publication date: September 30, 2021Inventors: Yutaka NAKAGAWA, Toshio TOYOSHIMA, Takehiko YANAGIYA
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Publication number: 20200156299Abstract: A flange is formed on a heating cylinder in a vicinity of a center in a longitudinal direction and a predetermined joining plate adheres to the flange. A flange plate is provided on a support frame. The joining plate is fixed to the flange plate to attach and detach freely, and the heating cylinder is caused to be supported by the support frame. Accordingly, movement in an axial direction and rotation of the heating cylinder are restricted. A guide portion for positioning during attachment and detachment is provided on one or both of the joining plate and the flange plate.Type: ApplicationFiled: November 19, 2019Publication date: May 21, 2020Applicant: THE JAPAN STEEL WORKS, LTD.Inventors: Takehiko YANAGIYA, Toshio TOYOSHIMA, Yutaka NAKAGAWA