Patents by Inventor Yuichiro Toyama
Yuichiro Toyama 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: 10837683Abstract: A throttling device is equipped with a valve seat in which a valve port for connecting a primary chamber and a secondary chamber is formed, a needle valve, a needle section which is inserted into the valve port, a guide section for guiding a slide shaft of the needle valve, and a coil spring for biasing the needle valve in a valve-closing direction. The guide section and the coil spring are positioned on the primary chamber side. The coil spring is covered by a stopper section. A gap between the stopper section and a main body case functions as a main body path for delivering a refrigerant from the primary chamber to the valve port.Type: GrantFiled: July 14, 2016Date of Patent: November 17, 2020Assignee: SAGINOMIYA SEISAKUSHO, INC.Inventors: Yasumasa Takada, Yuichiro Toyama, Hiroki Denda, Yoshihisa Arai, Junichi Yokota
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Patent number: 10222107Abstract: In a throttle device, a guide section including a small-diameter hole which slidably guides a guide stem of a needle member is formed upstream side portion from a communicating hole-in a guide tube.Type: GrantFiled: June 2, 2016Date of Patent: March 5, 2019Assignee: SAGINOMIYA SEISAKUSHO, INC.Inventors: Yasumasa Takada, Junichi Yokota, Yoshihisa Arai, Yuichiro Toyama, Hiroki Denda
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Patent number: 10208867Abstract: A throttling device is equipped with a valve seat in which a valve port for connecting a primary chamber and a secondary chamber is formed, a needle valve, a needle section which is inserted into the valve port, a guide section for guiding a slide shaft of the needle valve, and a coil spring for biasing the needle valve in a valve-closing direction. The guide section and the coil spring are positioned on the primary chamber side. The position of the needle valve in the valve-closing direction is restricted by a stopper section in a manner such that the minimum gap between the needle valve and the valve port is maintained. Furthermore, the needle valve is not seated on the valve seat.Type: GrantFiled: July 14, 2016Date of Patent: February 19, 2019Assignee: SAGINOMIYA SEISAKUSHO, INC.Inventors: Yasumasa Takada, Yuichiro Toyama, Hiroki Denda, Yoshihisa Arai, Junichi Yokota
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Patent number: 10161541Abstract: In a throttle device, a body portion has a flat surface at a position at a predetermined distance from its center axis. Thus, when a needle member is moving, a working pressure of a refrigerant present between an inner peripheral surface of a guide tube and the flat surface acts in a radial direction of the body portion and presses part of an outer peripheral surface of the body portion located opposite from the flat surface against the inner peripheral surface of the guide tube.Type: GrantFiled: January 7, 2016Date of Patent: December 25, 2018Assignee: SAGINOMIYA SEISAKUSHO, INC.Inventors: Yasumasa Takada, Yuichiro Toyama, Shinpei Yagi, Junichi Yokota
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Patent number: 10088207Abstract: In a throttle device, a needle member (20) includes a tapered portion (20P) having a taper angle (2?), and a length (X) along a center axis from a position (20PS) to an apical surface of the tapered portion (20P) is set to a value equal to or above a prescribed amount of lift (L?×cos2 ?), where the position (20PS) is a position corresponding to an edge (22as) of a valve port (22a) in a state where the tapered portion (20P) is inserted in the valve port (22a) and establishes a closed state of the valve port (22a).Type: GrantFiled: March 27, 2015Date of Patent: October 2, 2018Assignee: SAGINOMIYA SEISAKUSHO, INC.Inventors: Yasumasa Takada, Yuichiro Toyama
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Patent number: 10054343Abstract: A throttle device to decompress a refrigerant and to deliver the refrigerant to an evaporator, may have an opening level of a needle valve controlled following a condensation pressure. Inside a case including a primary chamber connected to the condenser and a secondary chamber connected to the evaporator, a valve seat formed with a port and a guide integral to the valve seat are provided. A spring to energize the needle valve toward the port side is provided inside the guide. The guide guides the needle valve along a line allowing an opening level of the port to be variable. A space between the guide and the case forms a channel to deliver the refrigerant from the port to the secondary chamber. A rear space of the needle valve within the guide forms an intermediate chamber. An intermediate channel introduces the refrigerant from the port into the intermediate chamber.Type: GrantFiled: February 27, 2015Date of Patent: August 21, 2018Assignee: Kabushiki Kaisha Saginomiya SeisakushoInventors: Yasumasa Takada, Yuichiro Toyama
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Publication number: 20180209704Abstract: A throttling device is equipped with a valve seat in which a valve port for connecting a primary chamber and a secondary chamber is formed, a needle valve, a needle section which is inserted into the valve port, a guide section for guiding a slide shaft of the needle valve, and a coil spring for biasing the needle valve in a valve-closing direction. The guide section and the coil spring are positioned on the primary chamber side. The coil spring is covered by a stopper section. A gap between the stopper section and a main body case functions as a main body path for delivering a refrigerant from the primary chamber to the valve port.Type: ApplicationFiled: July 14, 2016Publication date: July 26, 2018Applicant: SAGINIMIYA SEISAKUSHO, INC.Inventors: Yasumasa Takada, Yuichiro Toyama, Hiroki Denda, Yoshihisa Arai, Junichi Yokota
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Publication number: 20180202567Abstract: A throttling device is equipped with a valve seat in which a valve port for connecting a primary chamber and a secondary chamber is formed, a needle valve, a needle section which is inserted into the valve port, a guide section for guiding a slide shaft of the needle valve, and a coil spring for biasing the needle valve in a valve-closing direction. The guide section and the coil spring are positioned on the primary chamber side. The position of the needle valve in the valve-closing direction is restricted by a stopper section in a manner such that the minimum gap between the needle valve and the valve port is maintained. Furthermore, the needle valve is not seated on the valve seat.Type: ApplicationFiled: July 14, 2016Publication date: July 19, 2018Inventors: Yasumasa Takada, Yuichiro Toyama, Hiroki Denda, Yoshihisa Arai, Junichi Yokota
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Publication number: 20180149395Abstract: In a throttle device, a guide section including a small-diameter hole which slidably guides a guide stem of a needle member is formed upstream side portion from a communicating hole-in a guide tube.Type: ApplicationFiled: June 2, 2016Publication date: May 31, 2018Inventors: Yasumasa Takada, Junichi Yokota, Yoshihisa Arai, Yuichiro Toyama, Hiroki Denda
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Patent number: 9945592Abstract: Provided is a throttle device to decompress a refrigerant cooled by a condenser in a refrigerating cycle and to deliver the refrigerant to an evaporator, where a minimum space between a needle valve and a valve port can be accurately set. Inside a cylindrical main body case including a primary chamber connected to the condenser and a secondary chamber connected to the evaporator, a valve seat member formed with a valve port and a cylindrical guide member integral to the valve seat member are provided. A coil spring to energize the needle valve toward the valve port side is provided inside the guide member. A needle portion of the needle valve protrudes from the valve port toward the primary chamber. A tip portion of the needle portion abuts against a stopper member and the tip portion is thereby positioned.Type: GrantFiled: February 27, 2015Date of Patent: April 17, 2018Assignee: Kabushiki Kaisha Saginomiya SeisakushoInventors: Yasumasa Takada, Yuichiro Toyama
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Publication number: 20180038511Abstract: In a throttle device, a body portion has a flat surface at a position at a predetermined distance from its center axis. Thus, when a needle member is moving, a working pressure of a refrigerant present between an inner peripheral surface of a guide tube and the flat surface acts in a radial direction of the body portion and presses part of an outer peripheral surface of the body portion located opposite from the flat surface against the inner peripheral surface of the guide tube.Type: ApplicationFiled: January 7, 2016Publication date: February 8, 2018Inventors: Yasumasa Takada, Yuichiro Toyama, Shinpei Yagi, Junichi Yokota
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Publication number: 20180010705Abstract: In a throttle device depressurizing and sending a refrigerant condensed by the condenser to the evaporator, hunting of a needle valve is prevented and hysteresis in differential pressure-flow rate characteristics in a high-pressure region is reduced. A valve seat member, in which a valve port is formed, and a cylindrical guide member, which is integral with the valve seat member, are provided in a cylindrical main body case configuring a primary chamber connected to the condenser and a secondary chamber connected to the evaporator. The needle valve and a coil spring energizing toward the valve port are provided in the guide member. A blade member is provided on a boss portion of the needle valve. A blade of the blade member abuts on a cylindrical guide surface of the guide member to apply sliding resistance.Type: ApplicationFiled: January 5, 2016Publication date: January 11, 2018Inventors: Yasumasa Takada, Yuichiro Toyama, Shinpei Yagi, Junichi Yokota
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Publication number: 20170038106Abstract: Provided is a throttle device to decompress a refrigerant cooled by a condenser in a refrigerating cycle and to deliver the refrigerant to an evaporator, where a minimum space between a needle valve and a valve port can be accurately set. Inside a cylindrical main body case including a primary chamber connected to the condenser and a secondary chamber connected to the evaporator, a valve seat member formed with a valve port and a cylindrical guide member integral to the valve seat member are provided. A coil spring to energize the needle valve toward the valve port side is provided inside the guide member. A needle portion of the needle valve protrudes from the valve port toward the primary chamber. A tip portion of the needle portion abuts against a stopper member and the tip portion is thereby positioned.Type: ApplicationFiled: February 27, 2015Publication date: February 9, 2017Inventors: Yasumasa TAKADA, Yuichiro TOYAMA
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Publication number: 20170030616Abstract: In a throttle device, a needle member (20) includes a tapered portion (20P) having a taper angle (2?), and a length (X) along a center axis from a position (20PS) to an apical surface of the tapered portion (20P) is set to a value equal to or above a prescribed amount of lift (L?×cos2?), where the position (20PS) is a position corresponding to an edge (22as) of a valve port (22a) in a state where the tapered portion (20P) is inserted in the valve port (22a) and establishes a closed state of the valve port (22a).Type: ApplicationFiled: March 27, 2015Publication date: February 2, 2017Inventors: Yasumasa TAKADA, Yuichiro TOYAMA
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Publication number: 20170030614Abstract: A throttle device to decompress a refrigerant and to deliver the refrigerant to an evaporator, may have an opening level of a needle valve controlled following a condensation pressure. Inside a case including a primary chamber connected to the condenser and a secondary chamber connected to the evaporator, a valve seat formed with a port and a guide integral to the valve seat are provided. A spring to energize the needle valve toward the port side is provided inside the guide. The guide guides the needle valve along a line allowing an opening level of the port to be variable. A space between the guide and the case forms a channel to deliver the refrigerant from the port to the secondary chamber. A rear space of the needle valve within the guide forms an intermediate chamber. An intermediate channel introduces the refrigerant from the port into the intermediate chamber.Type: ApplicationFiled: February 27, 2015Publication date: February 2, 2017Inventors: Yasumasa Takada, Yuichiro Toyama