Patents by Inventor Naoki Masuda
Naoki Masuda 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: 20120298339Abstract: Disclosed is a liquid cooling system mounted on an electronic device. The liquid cooling system includes flow path (20) through which a refrigerant circulates, and pump (21) and reserve tank (22) arranged on flow path (20). A part of the side face of reserve tank (22) is set back to the vicinity of the center of reserve tank (22) to form concave portion (40). on the front center of concave portion (40), outlet (42) through which the refrigerant flows out is formed.Type: ApplicationFiled: February 10, 2010Publication date: November 29, 2012Inventor: Naoki Masuda
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Publication number: 20120256567Abstract: A motor drive control system connected to an alternating current/direct current conversion circuit which converts alternating-current voltage or alternating current to direct-current voltage or direct current are provided. A control circuit controls supply or stop of the supply of the direct-current voltage or direct current from the alternating current/direct current conversion circuit to the first number of first direct current/alternating current conversion circuits and the second number of second direct current/alternating current conversion circuits while maintaining the total of the outputs of the first number of motors and the outputs of the second number of motors at a certain power not more than power which can be supplied from the alternating current/direct current conversion circuit.Type: ApplicationFiled: April 3, 2012Publication date: October 11, 2012Applicant: Fanuc CorporationInventors: Naoki MASUDA, Kiichi Inaba
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Publication number: 20120107139Abstract: An electronic device capable of reducing a continuously generated whining sound is provided. Electronic device (1) includes: cooling target (2); cooling fan (3) that cools cooling target (2); temperature detector (4) that detects the temperature of cooling target (2); and controller (5) that determines a driving voltage to be supplied to cooling fan (3) on the basis of the temperature of cooling target (2) detected by temperature detector (4), supplies the driving voltage to cooling fan (3), and, when a waiting time for updating the driving voltage has elapsed after supplying the driving voltage, redetermines the driving voltage on the basis of the temperature of cooling target (2) detected by temperature detector (4) at that point in time and supplies the driving voltage to cooling fan.Type: ApplicationFiled: May 25, 2009Publication date: May 3, 2012Inventors: Michitaka Naitou, Naoki Masuda
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Publication number: 20110121641Abstract: A vehicle brake fluid pressure control apparatus includes: a normally open electromagnetic valve which adjusts a differential pressure between an upstream side and a downstream side; and a control unit including a memory part which stores a valve closing map which shows a relationship between the differential pressure between the upstream side and the downstream side of the pressure regulator valve and an output current value for closing the pressure regulator valve and a valve opening map which shows a relationship between the differential pressure and an output current value for opening the pressure regulator valve, wherein when attempting to reduce a fluid pressures, the control unit executes a current value switching control which controls a current flowing to the pressure regulator valve by selecting alternately an output current value of the valve opening map and an output current value of the valve closing map.Type: ApplicationFiled: November 18, 2010Publication date: May 26, 2011Applicant: NISSIN KOGYO CO., LTD.Inventors: Naoki MASUDA, Nobuyuki NOMURA
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Publication number: 20110125379Abstract: A vehicle brake fluid pressure control apparatus includes: a control unit including a memory part for storing a valve closing map which shows a relationship between a differential pressure between an upstream side and a downstream side of a pressure regulator valve and an output current value for closing the pressure regulator valve and a valve opening map which shows a relationship between the differential pressure and an output current value for opening the pressure regulator valve, wherein the control unit executes a current value switching control in which the output current value of the valve closing map is changed to that of the valve opening map and thereafter, the output current of the valve opening map is changed to an output current value which lies somewhere between the output current values of the valve closing map and the valve opening map.Type: ApplicationFiled: November 18, 2010Publication date: May 26, 2011Applicant: NISSIN KOGYO CO., LTD.Inventors: Naoki MASUDA, Nobuyuki NOMURA
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Patent number: 7871201Abstract: In a tapered roller bearing, LWR/DW is in the range of 1.1 to 1.7 where LWR represents a roller effective length of tapered rollers and DW represents a roller mean diameter of tapered rollers. RCO/LRO is 30 to 150, and RCI/LRI is 50 to 260 where RCO represents a crowning radius of an outer ring, LRO represents a raceway length of the outer ring, RCI represents a crowning radius of an inner ring and LRI represents a raceway length of the inner ring. The following expressions are satisfied: 20°???30°, and ??0.87??0.334?BK???0.87??0.167, where ? represents a raceway angle of the outer ring, ? represents a roller angle of the tapered rollers, and BK represents a rib angle of a large rib portion of the inner ring.Type: GrantFiled: August 16, 2006Date of Patent: January 18, 2011Assignee: JTEKT CorporationInventors: Hiroyuki Ohshima, Kazutoshi Toda, Hiroki Matsuyama, Kouji Kawaguchi, Naoki Masuda
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Patent number: 7832707Abstract: A normally open electromagnetic valve includes a fixed core, a movable core, a coil, a valve body, a valve seat member, a return spring, a raised portion formed at one of the fixed and movable core so as to project towards the other core and a recessed portion formed at the other core so as to face the raised portion. A relationship between the raised and recessed portions is set such that while a distance therebetween is within a predetermined range, an attraction force acting between the fixed core and the movable core by virtue of an excitation force of the coil decreases as the raised portion approaches or moves into the recessed portion, and when the valve body and the valve seat surface are brought into abutment with each other by exiting the coil, the distance between the raised portion and the recessed portion stays within the predetermined range.Type: GrantFiled: February 11, 2008Date of Patent: November 16, 2010Assignee: Nissin Kogyo Co., Ltd.Inventors: Masaya Shigeta, Naoki Masuda
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Publication number: 20090208152Abstract: A tapered roller bearing for a pinion shaft according to the invention includes an inner ring that has an outer circumferential surface on which an inner ring raceway surface is formed and that is integrally fixed to a one-end-side of the pinion shaft, an outer ring that has an inner circumferential surface on which an outer ring raceway surface is formed and that is fixed to a housing, and a plurality of tapered rollers rollably interposed between both of the raceway surfaces. An annular oil reservoir groove for storing lubricating oil is formed in a distal end portion at the one-end-side in an axial direction of the inner circumferential surface by being recessed thereinto adjacent to the outer ring raceway surface.Type: ApplicationFiled: February 12, 2009Publication date: August 20, 2009Applicant: JTEKT CorporationInventors: Naoki Masuda, Kanichi Koda, Tashihiro Kawaguchi
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Patent number: 7484895Abstract: According to the invention, there is provided a tapered roller bearing in which, where D represents a larger end diameter of the tapered roller and L represents a roller length thereof, the roller length L is 18 mm or smaller, and a ratio of the large end diameter and the roller length of the tapered roller which is expressed by D/L is in the range of 0.55 to 0.9. In addition, respective raceway surfaces of the outer ring and the inner ring and rolling contact surfaces of the tapered rollers are crowned, and a total crowning amount is set to be 50 ?m or larger, an outer ring crowning rate is set to be 40% or larger, and a roller crowning rate is set to be 20% or smaller.Type: GrantFiled: August 16, 2006Date of Patent: February 3, 2009Assignee: Jtekt CorporationInventors: Hiroki Matsuyama, Kouji Kawaguchi, Hiroyuki Ohshima, Naoki Masuda, Kazutoshi Toda
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Patent number: 7484894Abstract: A tapered roller bearing according to the invention is such that the surface hardnesses of a raceway surface of an inner ring and rolling contact surfaces of tapered rollers are set to 63 to 69HRC. In addition, respective raceway surfaces of an outer ring and the inner ring and the rolling contact surfaces of the tapered rollers are crowned and are set such that a total crowning amount is 50 ?m or larger, an outer crowning rate is 40% or larger and a roller crowning rate is 20% or smalled.Type: GrantFiled: August 16, 2006Date of Patent: February 3, 2009Assignee: JTEKT CorporationInventors: Kazutoshi Toda, Kouji Kawaguchi, Hiroyuki Ohshima, Naoki Masuda, Hiroki Matsuyama
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Publication number: 20080191156Abstract: A normally open electromagnetic valve includes a fixed core, a movable core, a coil, a valve body, a valve seat member, a return spring, a raised portion formed at one of the fixed and movable core so as to project towards the other core and a recessed portion formed at the other core so as to face the raised portion. A relationship between the raised and recessed portions is set such that while a distance therebetween is within a predetermined range, an attraction force acting between the fixed core and the movable core by virtue of an excitation force of the coil decreases as the raised portion approaches or moves into the recessed portion, and when the valve body and the valve seat surface are brought into abutment with each other by exiting the coil, the distance between the raised portion and the recessed portion stays within the predetermined range.Type: ApplicationFiled: February 11, 2008Publication date: August 14, 2008Applicant: NISSIN KOGYO CO., LTD.,Inventors: Masaya SHIGETA, Naoki Masuda
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Publication number: 20070127860Abstract: A tapered roller bearing according to the invention is such that the surface hardnesses of a raceway surface of an inner ring and rolling contact surfaces of tapered rollers are set to 63 to 69HRC. In addition, respective raceway surfaces of an outer ring and the inner ring and the rolling contact surfaces of the tapered rollers are crowned and are set such that a total crowning amount is 50 ?m or larger, an outer crowning rate is 40% or larger and a roller crowning rate is 20% or smaller.Type: ApplicationFiled: August 16, 2006Publication date: June 7, 2007Applicant: JTEKT CORPORATIONInventors: Kazutoshi Toda, Kouji Kawaguchi, Hiroyuki Ohshima, Naoki Masuda, Hiroki Matsuyama
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Publication number: 20070041676Abstract: In a tapered roller bearing, LWR/DW is in the range of 1.1 to 1.7 where LWR represents a roller effective length of tapered rollers and DW represents a roller mean diameter of tapered rollers. RCO/LRO is 30 to 150, and RCI/LRI is 50 to 260 where RCO represents a crowning radius of an outer ring, LRO represents a raceway length of the outer ring, RCI represents a crowning radius of an inner ring and LRI represents a raceway length of the inner ring. The following expressions are satisfied: 20°???30°, and ??0.87??0.334?BK???0.87??0.167, where ? represents a raceway angle of the outer ring, ? represents a roller angle of the tapered rollers, and BK represents a rib angle of a large rib portion of the inner ring.Type: ApplicationFiled: August 16, 2006Publication date: February 22, 2007Applicant: JTEKT CORPORATIONInventors: Hiroyuki Ohshima, Kazutoshi Toda, Hiroki Matsuyama, Kouji Kawaguchi, Naoki Masuda
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Publication number: 20070041677Abstract: A tapered roller bearing includes an outer ring, an inner ring, a plurality of tapered rollers interposed between the outer ring and the inner ring, and a cage for the tapered rollers. Ra is smaller than Rb where Ra represents a radius of curvature of a large end face of the tapered roller and Rb represents a radius of curvature of an end face of a large rib portion of the inner ring.Type: ApplicationFiled: August 16, 2006Publication date: February 22, 2007Applicant: JTEKT CORPORATIONInventors: Naoki Masuda, Kazutoshi Toda, Hiroki Matsuyama, Kouji Kawaguchi, Hiroyuki Ohshima
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Publication number: 20070041675Abstract: According to the invention, there is provided a tapered roller bearing in which, where D represents a larger end diameter of the tapered roller and L represents a roller length thereof, the roller length L is 18 mm or smaller, and a ratio of the large end diameter and the roller length of the tapered roller which is expressed by D/L is in the range of 0.55 to 0.9. In addition, respective raceway surfaces of the outer ring and the inner ring and rolling contact surfaces of the tapered rollers are crowned, and a total crowning amount is set to be 50 ?m or larger, an outer ring crowning rate is set to be 40% or larger, and a roller crowning rate is set to be 20% or smaller.Type: ApplicationFiled: August 16, 2006Publication date: February 22, 2007Applicant: JTEKT CORPORATIONInventors: Hiroki Matsuyama, Kouji Kawaguchi, Hiroyuki Ohshima, Naoki Masuda, Kazutoshi Toda
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Patent number: 6778051Abstract: An electromagnetic valve has: a coil unit including a bobbin around which a coil winding is wound, the bobbin having a central hole; a pipe body in which a fixed core is press-fitted and welded; and a valve operating unit with the pipe body inserted in the central hole of the bobbin at an one end thereof, a valve of the valve operating unit being opened or closed when the coil unit is energized, wherein, in an inserted portion of the pipe body opposed to the central hole of the bobbin, a welding portion in which a fixed core is welded is formed in a thin-wall sectional shape reduced only an outer diameter thereof, and a difference in the outer diameter between the welding portion and the inserted portion serves to absorb the swelling of a bead due to the welding.Type: GrantFiled: September 5, 2003Date of Patent: August 17, 2004Assignee: Nissin Kogyo., Ltd.Inventors: Takaomi Shirase, Naoki Masuda
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Patent number: 6774753Abstract: A normally closed electromagnetic valve has a cylindrical valve housing; a valve seat member; a fixed core; a movable core; a valve body; a return spring; and, a coil, one side of the valve housing being housed in a mounting hole opened on one end of a substrate so as to be restricted in axial movement thereof toward the interior of the mounting hole, wherein a large diameter portion is provided in the axially middle portion of the valve housing, the cylindrical valve seat member forms an annular chamber with the inner surface of the large diameter portion, the annular chamber communicates to the valve chamber, and is fixed to and fitted in one end of the valve housing and communicating holes through which the annular chamber is communicated to the exterior of the valve housing are provided in the large diameter portion.Type: GrantFiled: May 13, 2003Date of Patent: August 10, 2004Assignee: Nissin Kogyo Co., Ltd.Inventors: Takaomi Shirase, Naoki Masuda
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Patent number: 6772185Abstract: An object is to provide a time-series prediction method and apparatus utilizing wavelet coefficient series which can accurately predict a prediction value of an original time series. When a time-series prediction utilizing wavelet coefficient series is performed, a time series is wavelet-transformed by use of a wavelet transformation unit in order to decompose the time series into a plurality of time series which are band-restricted in the frequency domain, predicted values of frequency components obtained as a result of decomposition are predicted by use of corresponding prediction units, and the prediction values of the respective frequency components are reconstructed by use of an inverse wavelet transformation unit to thereby obtain a prediction value of the original time series.Type: GrantFiled: April 12, 2001Date of Patent: August 3, 2004Assignee: Japan Science and Technology CorporationInventors: Naoki Masuda, Kazuyuki Aihara
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Patent number: 6755390Abstract: An electromagnetic valve has a cylindrical-shaped valve housing, a fixing core; a movable core; a first return spring; a coil; a first valve mechanism including a movable seat member, a second return spring, a first valve part, a first valve seat, and a first valve hole, and a second valve mechanism including a cylindrical-shaped valve seat member, a second valve seat, a second valve hole, and a second valve part, wherein, on the movable seat member, a cylindrical-shaped guide part, when the second valve part is seated on the second valve seat, is cut off from the valve chamber but, when the second valve part is separated from the second valve seat, forms an annular-shaped passage communicating with the valve chamber and is slidably fitted into the second valve hole; and a communication passage for allowing the annular-shaped passage to communicate with the interior of the guide part is formed.Type: GrantFiled: May 13, 2003Date of Patent: June 29, 2004Assignee: Nissin Kogyo Co., Ltd.Inventors: Naoki Masuda, Kazuhiro Ota, Keiichi Tatsuno, Takaomi Shirase
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Publication number: 20040051609Abstract: An electromagnetic valve has: a coil unit including a bobbin around which a coil winding is wound, the bobbin having a central hole; a pipe body in which a fixed core is press-fitted and welded; and a valve operating unit with the pipe body inserted in the central hole of the bobbin at an one end thereof, a valve of the valve operating unit being opened or closed when the coil unit is energized, wherein, in an inserted portion of the pipe body opposed to the central hole of the bobbin, a welding portion in which a fixed core is welded is formed in a thin-wall sectional shape reduced only an outer diameter thereof, and a difference in the outer diameter between the welding portion and the inserted portion serves to absorb the swelling of a bead due to the welding.Type: ApplicationFiled: September 5, 2003Publication date: March 18, 2004Inventors: Takaomi Shirase, Naoki Masuda