Patents by Inventor Takumi Oikawa
Takumi Oikawa 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: 20230278671Abstract: A liquid container according to the present invention includes: a container 2 temporarily storing a fuel; and a drain unit 3 discharging the fuel from a communication hole 11 provided at a lower portion of the container 2, and the drain unit 3 includes a valve body 15 formed of metal with higher strength and hardness than those of the container 2 made of resin, including a drain passage establishing communication between the communication hole 11 and outside and a valve seat facing the drain passage, which are formed therein, and detachably fixed to the container 2, and a drain screw 16 having a valve element attached to the valve body 15 for opening and closing the drain passage by being separated from or abutting the valve seat.Type: ApplicationFiled: February 23, 2023Publication date: September 7, 2023Applicant: MIKUNI CORPORATIONInventor: Takumi OIKAWA
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Patent number: 9810136Abstract: A coolant-control valve that performs initialization learning using a stopper and provides an efficient structure by an initialization learning stopper within an actuator which drives a valve body. The coolant-control valve is equipped with a rotor driven to control a flow rate of coolant for cooling an engine, a casing that houses the rotor, and a rotary drive device that drives the rotor. Control means of the rotary drive device have an initialization learning function of an operating range of the rotor. The rotary drive device is equipped with a motor and a reduction gear. The operating range of the rotor is restricted by the operating range of an output gear among power transmission elements in the reduction gear. A groove of the output gear and a fixed-angle stopper inserted into the groove are restricting means for use during initialization learning by the control means.Type: GrantFiled: December 1, 2014Date of Patent: November 7, 2017Assignee: MIKUNI CORPORATIONInventors: Toru Tsuchiya, Takumi Oikawa, Yoshiyuki Kanesaka, Satoshi Ando
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Patent number: 9650943Abstract: A rotary valve that includes a rotor and a casing which rotatably accommodates the rotor. The casing includes an inflow side opening through which a fluid flows in from the outside to the rotor accommodating space and two outflow side openings through which the fluid flows out from the rotor accommodating space to the outside, at a position opposite to an outer circumferential surface of the rotor. The rotor is formed in a cylindrical shape having an internal space. An end surface of the rotor is provided with an end surface side opening which communicates with the internal space. The outer circumferential surface of the rotor is provided with a rotor outer circumferential opening and a rotor outer circumferential blocking surface which are configured to open and close the outflow side openings of the casing.Type: GrantFiled: November 26, 2014Date of Patent: May 16, 2017Assignee: MIKUNI CORPORATIONInventors: Toru Tsuchiya, Takumi Oikawa, Yoshiyuki Kanesaka, Masayuki Daikuhara
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Patent number: 9567894Abstract: A rotary valve that includes a rotor, and a casing including a rotor accommodating space that accommodates the rotor. A rotor opening which is a passage of cooling water is provided in the rotor. Openings which communicate with the rotor opening are provided at positions of an inner circumferential surface of the rotor accommodating space which oppose an outer circumferential surface of the rotor. Seal members are provided to extend from the openings toward the rotor. A tip end abutting portion of the seal member which abuts on the rotor includes an inwardly curved portion. The inwardly curved portion functions as a seal and also functions as a spring. The inwardly curved portion is narrowed inwardly toward a tip end side, and is curved to be folded back.Type: GrantFiled: November 21, 2014Date of Patent: February 14, 2017Assignees: MIKUNI CORPORATION, KOKOKU INTECH CO., LTD.Inventors: Takumi Oikawa, Yoshiyuki Kanesaka, Toru Tsuchiya, Nobutatsu Kan
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Patent number: 9518503Abstract: A cooling water control valve apparatus capable of independently controlling flow rates of cooling water in two lines with a single apparatus for cooling water control and capable of achieving cost reduction. A cooling water control valve apparatus which adjusts a flow rate of cooling water for cooling an object to be cooled includes two inlet ports through which cooling water is introduced, an electrical control valve which is arranged at a first passage communicated with one of the inlet ports and which adjusts a flow rate of cooling water flowing through the first passage with electronic control, and a thermosensitive valve which is arranged at a second passage communicated with the other of inlet ports and which adjusts a flow rate of cooing water flowing through the second passage owing to displacement of a temperature detecting medium with temperature.Type: GrantFiled: February 22, 2013Date of Patent: December 13, 2016Inventors: Toru Tsuchiya, Takumi Oikawa, Masayuki Daikuhara, Hiromasa Ogawa, Masaki Teshi
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Patent number: 9429064Abstract: A coolant control valve apparatus 10 includes a main valve 11 which adjusts a flow rate of a coolant in a main channel 4 to control the flow rate of the coolant in the main channel 4. Further, the coolant control valve apparatus 10 includes a detour channel 67 provided being diverged from the main channel 4 so as to detour the main valve 11. The coolant control valve apparatus 10 includes a valve main body 41 which opens and closes the detour channel 67 and a temperature detection medium 42 which can open and close the valve main body 41 according to a temperature of the coolant. The temperature detection medium 42 is disposed in the diverging part between the detour channel 67 and the bypass channel 5.Type: GrantFiled: March 12, 2014Date of Patent: August 30, 2016Assignee: MIKUNI CORPORATIONInventors: Kenichiro Nagahama, Toru Tsuchiya, Takumi Oikawa, Masayuki Daikuhara
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Publication number: 20150083057Abstract: A coolant-control valve that performs initialization learning using a stopper and provides an efficient structure by an initialization learning stopper within an actuator which drives a valve body. The coolant-control valve is equipped with a rotor driven to control a flow rate of coolant for cooling an engine, a casing that houses the rotor, and a rotary drive device that drives the rotor. Control means of the rotary drive device have an initialization learning function of an operating range of the rotor. The rotary drive device is equipped with a motor and a reduction gear. The operating range of the rotor is restricted by the operating range of an output gear among power transmission elements in the reduction gear. A groove of the output gear and a fixed-angle stopper inserted into the groove are restricting means for use during initialization learning by the control means.Type: ApplicationFiled: December 1, 2014Publication date: March 26, 2015Applicant: MIKUNI CORPORATIONInventors: Toru TSUCHIYA, Takumi OIKAWA, Yoshiyuki KANESAKA, Satoshi ANDO
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Publication number: 20150075453Abstract: The rotary valve includes a rotor, and a casing including a rotor accommodating space. A rotor opening which is a passage of cooling water is in the rotor. Openings which communicate with the rotor opening are at positions of an inner circumferential surface of the rotor accommodating space which oppose an outer circumferential surface of the rotor. Seal members extend from the openings toward the rotor. A tip end abutting portion of the seal member which abuts on the rotor functions as a seal and as a spring. The seal member is positioned by engagement with each of positioning portions provided on the openings and includes a rotation stopping portion that stops a rotation.Type: ApplicationFiled: November 21, 2014Publication date: March 19, 2015Applicant: MIKUNI CORPORATIONInventor: Takumi OIKAWA
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Publication number: 20150075658Abstract: A rotary valve that includes a rotor and a casing which rotatably accommodates the rotor. The casing includes an inflow side opening through which a fluid flows in from the outside to the rotor accommodating space and two outflow side openings through which the fluid flows out from the rotor accommodating space to the outside, at a position opposite to an outer circumferential surface of the rotor. The rotor is formed in a cylindrical shape having an internal space. An end surface of the rotor is provided with an end surface side opening which communicates with the internal space. The outer circumferential surface of the rotor is provided with a rotor outer circumferential opening and a rotor outer circumferential blocking surface which are configured to open and close the outflow side openings of the casing.Type: ApplicationFiled: November 26, 2014Publication date: March 19, 2015Applicant: MIKUNI CORPORATIONInventors: Toru TSUCHIYA, Takumi OIKAWA, Yoshiyuki KANESAKA, Masayuki DAIKUHARA
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Publication number: 20150075452Abstract: A rotary valve that includes a rotor, and a casing including a rotor accommodating space that accommodates the rotor. A rotor opening which is a passage of cooling water is provided in the rotor. Openings which communicate with the rotor opening are provided at positions of an inner circumferential surface of the rotor accommodating space which oppose an outer circumferential surface of the rotor. Seal members are provided to extend from the openings toward the rotor. A tip end abutting portion of the seal member which abuts on the rotor includes an inwardly curved portion. The inwardly curved portion functions as a seal and also functions as a spring. The inwardly curved portion is narrowed inwardly toward a tip end side, and is curved to be folded back.Type: ApplicationFiled: November 21, 2014Publication date: March 19, 2015Applicants: MIKUNI CORPORATION, KOKOKU INTECH CO., LTD.Inventors: Takumi OIKAWA, Yoshiyuki KANESAKA, Toru TSUCHIYA, Nobutatsu KAN
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Publication number: 20140190427Abstract: A coolant control valve apparatus 10 includes a main valve 11 which adjusts a flow rate of a coolant in a main channel 4 to control the flow rate of the coolant in the main channel 4. Further, the coolant control valve apparatus 10 includes a detour channel 67 provided being diverged from the main channel 4 so as to detour the main valve 11. The coolant control valve apparatus 10 includes a valve main body 41 which opens and closes the detour channel 67 and a temperature detection medium 42 which can open and close the valve main body 41 according to a temperature of the coolant. The temperature detection medium 42 is disposed in the diverging part between the detour channel 67 and the bypass channel 5.Type: ApplicationFiled: March 12, 2014Publication date: July 10, 2014Applicant: MIKUNI CORPORATIONInventors: Kenichiro Nagahama, Toru Tsuchiya, Takumi Oikawa, Masayuki Daikuhara
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Patent number: 7056476Abstract: A refrigerator includes a deodorizer disposed in a cold air circulation path for deodorizing an atmosphere in the refrigerator. The deodorizer includes discharging means for producing ozone and ultraviolet rays by means of high-voltage discharge and a photocatalyst module for decomposing an odor component and injurious matter contained in the atmosphere by means of photocatalyst.Type: GrantFiled: October 11, 2001Date of Patent: June 6, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Daishin Okada, Noboru Segawa, Naohiko Shimura, Takeshi Imamura, Takao Hattori, Takumi Oikawa
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Patent number: 7051615Abstract: The present apparatus includes an accelerator pedal 10, a pedal arm 20, a pedal shaft 30 which supports the pedal arm 20 so as to be free to swing, a return spring 40, a friction generating mechanism 50 which generates friction force corresponding to a position of the pedal arm 20, an accelerator position sensor 60 and a control segment 70 which controls an opening of a throttle valve 110 based on an output signal of the sensor 60. A play range in which a friction force equal to or larger than a specific level is not generated is set to the friction generating mechanism in the range where the pedal arm moves from a resting position by a specific amount. In the play range, an output signal of the accelerator position sensor 60 is kept constant so that the throttle valve is kept at a specific opening. In this manner, a desirable operating feeling without an unsuitable feeling with the accelerator pedal operation is obtained, and the accelerator apparatus is compact.Type: GrantFiled: September 28, 2001Date of Patent: May 30, 2006Assignee: Mikuni CorporationInventors: Masato Kumamoto, Takumi Oikawa, Tsuyoshi Hosono
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Patent number: 6745642Abstract: An accelerator pedal assembly comprises a pedal arm, a pedal shaft, a return spring and a frictional force generating mechanism for generating frictional force according to movement of the pedal arm. The frictional force generating mechanism has a sliding guide path defining a sliding surface for generating frictional force and a frictional force varying mechanism located within the sliding guide path for varying frictional force according to movement of the pedal arm in such a manner that the frictional force generated when the pedal arm moves towards the position of maximum depression increases according to the amount of movement, and the frictional force generated when the pedal arm moves towards the rest position is reduced according to the amount of movement. This enables the assembly to be made smaller and means that the accelerator pedal assembly operates more smoothly as a result of superior depression force hysteresis.Type: GrantFiled: March 14, 2002Date of Patent: June 8, 2004Assignee: Mikuni CorporationInventors: Masato Kumamoto, Takumi Oikawa
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Publication number: 20040011155Abstract: The present apparatus comprises an accelerator pedal 10, a pedal arm 20, a pedal shaft 30 which supports the pedal arm 20 free to swing, a return spring 40, a friction generating mechanism 50 which generates friction force in accordance with the movement of the pedal arm 20, an accelerator position sensor 60 and a control segment 70 which controls an opening of a throttle valve 110 in accordance with an output signal of the sensor 60, wherein a play range in which friction force equal to or larger than a specific level is not generated is set to the friction generating mechanism in the range where the pedal arm moves from the resting position by a specific amount, and in the play range, an output signal of the accelerator position sensor 60 is kept constant resulting in that the throttle valve is kept at a specific opening. In this manner, desirable operating feeling without unsuitable feeling with the accelerator pedal operation is obtained while the accelerator apparatus is being compact and so on.Type: ApplicationFiled: April 2, 2003Publication date: January 22, 2004Inventors: Masato Kumamoto, Takumi Oikawa, Tsuyoshi Hosono
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Publication number: 20030173662Abstract: Electronic equipment is composed of a circuit board with a surface-printed circuit layer, an electronic part with a terminal, an under-fill provided between the electronic part and the surface-printed circuit layer. The terminal is electrically connected to the surface-printed circuit layer so that the electronic part is mounted on the circuit boarding an area, in which the circuit board faces the bottom face of the electronic part except for the terminal. The under-fill directly contacts the electronic part and the surface-printed circuit layer so that the under-fill fixes the electronic part to the circuit board.Type: ApplicationFiled: February 14, 2003Publication date: September 18, 2003Inventor: Takumi Oikawa
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Publication number: 20020100341Abstract: An accelerator pedal assembly comprises a pedal arm, a pedal shaft, a return spring and a frictional force generating mechanism for generating frictional force according to movement of the pedal arm. The frictional force generating mechanism has a sliding guide path defining a sliding surface for generating frictional force and a frictional force varying mechanism located within the sliding guide path for varying frictional force according to movement of the pedal arm in such a manner that the frictional force generated when the pedal arm moves towards the position of maximum depression increases according to the amount of movement, and the frictional force generated when the pedal arm moves towards the rest position is reduced according to the amount of movement. This enables the assembly to be made smaller and means that the accelerator pedal assembly operates more smoothly as a result of superior depression force hysteresis.Type: ApplicationFiled: March 14, 2002Publication date: August 1, 2002Inventors: Masato Kumamoto, Takumi Oikawa
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Publication number: 20020037240Abstract: A refrigerator includes a deodorizer disposed in a cold air circulation path for deodorizing an atmosphere in the refrigerator. The deodorizer includes discharging means for producing ozone and ultraviolet rays by means of high-voltage discharge and a photocatalyst module for decomposing an odor component and injurious matter contained in the atmosphere by means of photocatalyst.Type: ApplicationFiled: October 11, 2001Publication date: March 28, 2002Inventors: Daishin Okada, Noboru Segawa, Naohiko Shimura, Takeshi Imamura, Takao Hattori, Takumi Oikawa
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Patent number: 6263758Abstract: A pedal rod (12) connected to an accelerator pedal (10) has one end which is a free end. A friction generating device (20) is disposed at the free end of the pedal rod (12). The friction generating device (20) has a cylindrical housing (26) as a fixed friction member, a movable friction member (28) disposed movably in the interior of the housing (26) and kept in contact with the housing, and a friction member return spring (30) for urging the movable friction member (28) in a predetermined direction. When the accelerator pedal (10) is depressed, the free end of the pedal rod (12) pushes both movable friction member (28) and friction member return spring (30), so that there occur friction between the movable friction member (28) and the housing (fixed friction member) and friction induced by the friction member return spling (30). Upon release of the accelerator pedal (10), the movable friction member (28) is returned to its original position by the friction member return spring (30).Type: GrantFiled: September 15, 1999Date of Patent: July 24, 2001Assignee: Mikuni CorporationInventors: Masato Kumamoto, Takumi Oikawa, Yuuichirou Toukai, Yoshio Shibuya