Patents by Inventor Toshiyuki Kuyo
Toshiyuki Kuyo 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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Publication number: 20220065198Abstract: To provide a fuel injection nozzle that not only enables adjustment of a flow rate, but also causes contaminants and gum to pass through to reduce an effect on the flow rate. A fuel injection nozzle having a flat portion on an outer peripheral face of a needle is disclosed. The fuel injection nozzle opens at a predetermined angle, and, by the needle moving in an axial direction in an inner periphery of an injection hole, gaps are formed between the outer peripheral face of the needle and an inner peripheral face of the injection hole of a nozzle body. Adjustment to a desired fuel injection flow rate is possible by setting an outer diameter of the needle, a distance from the seat portion to a starting position of the flat portion on the outer peripheral face of the needle, and an incline angle of the flat portion.Type: ApplicationFiled: September 2, 2021Publication date: March 3, 2022Inventors: Daisuke Suzuki, Takumi Takahashi, Naoya Wada, Giovanni Leccese, Satomi Ochiyasu, Haruki Kudo, Toshiyuki Kuyo
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Patent number: 11236704Abstract: An improved primary pump for a carburetor is provided. The primary pump has a reduced cost and reduced space construction. The primary pump includes: a flexible cap having a cavity; an inlet open to the cavity of the flexible cap; an inlet side path fluidly coupled to the inlet; an inlet side check valve disposed in the inlet side path; an outlet open to the cavity of the flexible cap; an outlet side path fluidly coupled to the outlet; and an outlet side check valve disposed on the outlet side path, wherein at least one among the inlet side check valve and the outlet side check valve comprises a flap formed in a pump diaphragm of a fuel pump of the carburetor.Type: GrantFiled: July 30, 2020Date of Patent: February 1, 2022Assignee: ZAMA JAPAN KABUSHIKI KAISHAInventors: Hiroyuki Oka, Kazunori Tabata, Toshiyuki Kuyo
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Publication number: 20210332776Abstract: Disclosed herein is a rotary vaporizer that solves the problem caused by a conventional throttle valve becoming cantilevered when the throttle wire is pulled. The rotary vaporizer includes: a valve shaft; a measuring needle disposed within the valve shaft; a throttle valve having a lumen to receive the valve shaft; and a support pin having a conical distal end having a predetermined angle. The conical distal end is configured to move axially move the throttle valve by gliding on an angled surface of the throttle valve, and the angled surface is parallel to a surface of the conical distal end.Type: ApplicationFiled: April 19, 2021Publication date: October 28, 2021Inventors: Daisuke Suzuki, Takumi Takahashi, Naoya Wada, Toshiyuki Kuyo
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Publication number: 20210033045Abstract: An improved primary pump for a carburetor is provided. The primary pump has a reduced cost and reduced space construction. The primary pump includes: a flexible cap having a cavity; an inlet open to the cavity of the flexible cap; an inlet side path fluidly coupled to the inlet; an inlet side check valve disposed in the inlet side path; an outlet open to the cavity of the flexible cap; an outlet side path fluidly coupled to the outlet; and an outlet side check valve disposed on the outlet side path, wherein at least one among the inlet side check valve and the outlet side check valve comprises a flap formed in a pump diaphragm of a fuel pump of the carburetor.Type: ApplicationFiled: July 30, 2020Publication date: February 4, 2021Inventors: Hiroyuki Oka, Kazunori Tabata, Toshiyuki Kuyo
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Publication number: 20200325853Abstract: Disclosed are example embodiments of a diaphragm carburetor. Example embodiments includes: a pressure regulator; a fuel chamber for storing fuel to be introduced into an intake channel; a diaphragm; an atmospheric-pressure chamber partitioned by the diaphragm 100; a fuel supply channel that feeds the fuel, a return channel that is connected to the fuel supply channel and returns excess fuel that is not introduced into the fuel chamber to a fuel-tank side. The fuel is supplied into the intake channel while being adjusted to a predetermined pressure by the pressure regulator. The diaphragm carburetor also includes an opening and closing mechanism that opens at engine startup to allow the fuel to pass through and closes during normal driving to prevent the fuel from passing through.Type: ApplicationFiled: December 20, 2019Publication date: October 15, 2020Inventors: Daisuke Suzuki, Toshiyuki Kuyo, Issei Fumoto
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Patent number: 10669972Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator and having a main fuel jet and nozzle assembly with a main fuel jet releasably coupled to the body of the carburetor. Alternatively, a main fuel jet and nozzle assembly includes a nozzle and check valve retainer formed as a single component. In other embodiments, a carburetor is provided having a fuel pump and fuel pressure regulator positioned on the same side of the body. A fuel pump and metering chamber diaphragm sandwiched between the body of the carburetor and a pump body and cover, separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator.Type: GrantFiled: January 17, 2018Date of Patent: June 2, 2020Assignee: ZAMA JAPAN KABUSHIKI KAISHAInventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Patent number: 10495029Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator. The fuel pump and fuel pressure regulator are positioned on the same side of the body. A fuel pump and metering chamber diaphragm is sandwiched between the body of the carburetor and a pump body and cover. The diaphragm separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator. Inlet and outlet flapper valves are part of the diaphragm or a separate flapper valve member positioned between the body and the diaphragm.Type: GrantFiled: March 5, 2018Date of Patent: December 3, 2019Assignee: ZAMA JAPAN KABUSHIKI KAISHAInventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Publication number: 20190078537Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator. The fuel pump and fuel pressure regulator are positioned on the same side of the body. A fuel pump and metering chamber diaphragm is sandwiched between the body of the carburetor and a pump body and cover. The diaphragm separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator. Inlet and outlet flapper valves are part of the diaphragm or a separate flapper valve member positioned between the body and the diaphragm.Type: ApplicationFiled: March 5, 2018Publication date: March 14, 2019Inventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Publication number: 20190024613Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator and having a main fuel jet and nozzle assembly with a main fuel jet releasably coupled to the body of the carburetor. Alternatively, a main fuel jet and nozzle assembly includes a nozzle and check valve retainer formed as a single component. In other embodiments, a carburetor is provided having a fuel pump and fuel pressure regulator positioned on the same side of the body. A fuel pump and metering chamber diaphragm sandwiched between the body of the carburetor and a pump body and cover, separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator.Type: ApplicationFiled: January 17, 2018Publication date: January 24, 2019Inventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Patent number: 9938932Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator. The fuel pump and fuel pressure regulator are positioned on the same side of the body. A fuel pump and metering chamber diaphragm is sandwiched between the body of the carburetor and a pump body and cover. The diaphragm separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator. Inlet and outlet flapper valves are part of the diaphragm or a separate flapper valve member positioned between the body and the diaphragm.Type: GrantFiled: February 16, 2016Date of Patent: April 10, 2018Assignee: ZAMA JAPAN KABUSHIKI KAISHAInventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Patent number: 9897042Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator and having a main fuel jet and nozzle assembly with a main fuel jet releasably coupled to the body of the carburetor. Alternatively, a main fuel jet and nozzle assembly includes a nozzle and check valve retainer formed as a single component. In other embodiments, a carburetor is provided having a fuel pump and fuel pressure regulator positioned on the same side of the body. A fuel pump and metering chamber diaphragm sandwiched between the body of the carburetor and a pump body and cover, separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator.Type: GrantFiled: February 16, 2016Date of Patent: February 20, 2018Assignee: ZAMA JAPAN KABUSHIKI KAISHAInventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Publication number: 20160237954Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator and having a main fuel jet and nozzle assembly with a main fuel jet releasably coupled to the body of the carburetor. Alternatively, a main fuel jet and nozzle assembly includes a nozzle and check valve retainer formed as a single component. In other embodiments, a carburetor is provided having a fuel pump and fuel pressure regulator positioned on the same side of the body. A fuel pump and metering chamber diaphragm sandwiched between the body of the carburetor and a pump body and cover, separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator.Type: ApplicationFiled: February 16, 2016Publication date: August 18, 2016Inventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Publication number: 20160237953Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator. The fuel pump and fuel pressure regulator are positioned on the same side of the body. A fuel pump and metering chamber diaphragm is sandwiched between the body of the carburetor and a pump body and cover. The diaphragm separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator. Inlet and outlet flapper valves are part of the diaphragm or a separate flapper valve member positioned between the body and the diaphragm.Type: ApplicationFiled: February 16, 2016Publication date: August 18, 2016Inventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Patent number: 9382876Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator and having a main fuel jet and nozzle assembly with a main fuel jet releasably coupled to the body of the carburetor. Alternatively, a main fuel jet and nozzle assembly includes a nozzle and check valve retainer formed as a single component. In other embodiments, a carburetor is provided having a fuel pump and fuel pressure regulator positioned on the same side of the body. A fuel pump and metering chamber diaphragm sandwiched between the body of the carburetor and a pump body and cover, separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator.Type: GrantFiled: April 24, 2014Date of Patent: July 5, 2016Assignee: ZAMA JAPAN KABUSHIKI KAISHAInventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Patent number: 9297336Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator. The fuel pump and fuel pressure regulator are positioned on the same side of the body. A fuel pump and metering chamber diaphragm is sandwiched between the body of the carburetor and a pump body and cover. The diaphragm separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator. Inlet and outlet flapper valves are part of the diaphragm or a separate flapper valve member positioned between the body and the diaphragm.Type: GrantFiled: December 23, 2013Date of Patent: March 29, 2016Assignee: ZAMA JAPAN KABUSHIKI KAISHAInventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry
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Publication number: 20150176531Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator. The fuel pump and fuel pressure regulator are positioned on the same side of the body. A fuel pump and metering chamber diaphragm is sandwiched between the body of the carburetor and a pump body and cover. The diaphragm separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator. Inlet and outlet flapper valves are part of the diaphragm or a separate flapper valve member positioned between the body and the diaphragm.Type: ApplicationFiled: December 23, 2013Publication date: June 25, 2015Inventors: David R. Shebuski, Toshiyuki Kuyo, Nonaka Takumi, Jay A. Perry
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Publication number: 20150176532Abstract: A carburetor includes a body with an air intake path, a fuel pump and a fuel pressure regulator and having a main fuel jet and nozzle assembly with a main fuel jet releasably coupled to the body of the carburetor. Alternatively, a main fuel jet and nozzle assembly includes a nozzle and check valve retainer formed as a single component. In other embodiments, a carburetor is provided having a fuel pump and fuel pressure regulator positioned on the same side of the body. A fuel pump and metering chamber diaphragm sandwiched between the body of the carburetor and a pump body and cover, separates a pump chamber from a pulse chamber of the fuel pump and separates a fuel chamber from an air chamber in the fuel pressure regulator.Type: ApplicationFiled: April 24, 2014Publication date: June 25, 2015Applicant: ZAMA JAPAN KABUSHIKI KAISHAInventors: David R. Shebuski, Toshiyuki Kuyo, Takumi Nonaka, Jay A. Perry