Patents by Inventor Hirofumi Takaki
Hirofumi Takaki 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: 11939928Abstract: An EGR valve is provided in an EGR passage circulating a part of an exhaust gas of an exhaust pipe in an intake pipe as an EGR gas, the EGR valve adjusting an EGR gas amount flowing in the EGR passage when an engine is in an EGR region, a differential pressure device is provided in the intake pipe, the differential pressure device adjusting a differential pressure of the EGR valve, a control unit is provided to control the EGR valve and the differential pressure device, and the EGR control method includes switching whether to adjust the EGR gas amount using the EGR valve and the differential pressure device or to adjust the EGR gas amount using the EGR valve only on the basis of an exhaust gas pressure of an inlet portion of the EGR passage.Type: GrantFiled: September 6, 2019Date of Patent: March 26, 2024Assignee: NISSAN MOTOR CO., LTD.Inventors: Daisuke Takaki, Hirofumi Tsuchida, Takayuki Hamamoto
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Patent number: 11021823Abstract: An embroidery sewing machine including: a perforation head having a plurality of vertically reciprocating bars and punches where each punch includes a perforation head; a receiving base having a receiving member configured to receive the punch; a holder frame for supporting a workpiece in an expanded state between the punch and the receiving base, the holder frame being configured to be controlled to move in two-dimensional planar directions; and a tape feed mechanism feeding a tape-like cushioning material having a wider width than at least a processing area of the punch, wherein the material is fed from the front/rear direction and between the workpiece supported in the holder frame and an upper surface of the receiving member, and wherein an upstream portion of the material is shifted downstream to where the receiving member is located according to the vertically reciprocating motion of the punch.Type: GrantFiled: November 13, 2017Date of Patent: June 1, 2021Assignee: TOKAIKOGYO MISHIN KABUSHIKI KAISHAInventor: Hirofumi Takaki
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Publication number: 20200024782Abstract: An embroidery sewing machine including: a perforation head having a plurality of vertically reciprocating bars and punches where each punch includes a perforation head; a receiving base having a receiving member configured to receive the punch; a holder frame for supporting a workpiece in an expanded state between the punch and the receiving base, the holder frame being configured to be controlled to move in two-dimensional planar directions; and a tape feed mechanism feeding a tape-like cushioning material having a wider width than at least a processing area of the punch, wherein the material is fed from the front/rear direction and between the workpiece supported in the holder frame and an upper surface of the receiving member, and wherein an upstream portion of the material is shifted downstream to where the receiving member is located according to the vertically reciprocating motion of the punch.Type: ApplicationFiled: November 13, 2017Publication date: January 23, 2020Applicant: TOKAIKOGYO MISHIN KABUSHIKI KAISHAInventor: Hirofumi TAKAKI
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Publication number: 20150267335Abstract: A restricting member is positioned above a machine table but beneath a sewing frame movable in X and Y directions on a sewing machine. The restricting member is connected to the sewing frame in such a manner that it moves in the Y direction together with the sewing frame but does not follow movement of the sewing frame in the X direction. The restricting member engages with two sides of the sewing frame, extending in the X direction, so as to maintain at a predetermined interval in the Y direction between the two sides. A guide member is provided on the upper surface of the table and slidably guides the restricting member in the Y direction. For example, the guide member has a groove-like recessed portion formed therein to open upward, and the restricting member is received in the groove-like recessed portion and slidable along the recessed portion.Type: ApplicationFiled: October 17, 2013Publication date: September 24, 2015Inventors: Katsuharu Yoshikawa, Hirofumi Takaki
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Patent number: 8513898Abstract: A light emitting device includes: a plurality of light emitting elements configured to emit light when a direct current is supplied thereto; and a direct current power supply circuit configured to supply an electric current of a given level or more to the light emitting elements. The light emitting device further includes: a light emitting element voltage detection circuit configured to detect a voltage applied to the light emitting elements; and a forward/reverse inverting circuit configured, when the light emitting element voltage detection circuit detects an abnormality in a light emitting element, to apply a reverse voltage to the light emitting element in which the abnormality is detected.Type: GrantFiled: March 26, 2009Date of Patent: August 20, 2013Assignee: Panasonic CorporationInventors: Masanao Okawa, Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi
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Patent number: 8502471Abstract: A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start.Type: GrantFiled: December 18, 2008Date of Patent: August 6, 2013Assignee: Panasonic CorporationInventors: Masanao Ookawa, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Hirofumi Takaki
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Patent number: 8432105Abstract: A light control apparatus and a lighting appliance using the same enable increased luminous efficiency in light control and elongated operative life of a light source. The lighting appliance includes a light source and a light control apparatus. The light control apparatus comprises an electric current output circuit that outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, and a light control circuit that performs light control of the light source by intermittently supplying the constant electric current outputted from the electric current output circuit. The light control apparatus also comprises an electric discharge prevention circuit (diode) that prevents electric discharge of an electric charge charged in a capacitive component of the organic electroluminescence device.Type: GrantFiled: September 24, 2008Date of Patent: April 30, 2013Assignee: Panasonic CorporationInventors: Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Masanao Okawa
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Patent number: 8344651Abstract: It is an object to provide a light control apparatus and a lighting appliance using the same which enables to increase luminous efficiency in the light control. The lighting appliance includes a light source and a light control apparatus. The light control apparatus includes an electric current output circuit which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, an electric current control circuit which controls an intensity of a driving electric current outputted from the electric current output circuit, and the electric current control circuit biases a direct current component so as to vary the driving electric current periodically between a predetermined maximum value and a predetermined minimum value and flows in the same direction at all times in the light control of the light source.Type: GrantFiled: September 24, 2008Date of Patent: January 1, 2013Assignee: Panasonic CorporationInventors: Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Masanao Okawa
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Patent number: 8138679Abstract: Provision of a light emitting device having functionality for restoring to normal even if a low-voltage error occurs, by temporarily applying a reverse current to a low-voltage error light emitting element using a direction inverting circuit, and repairing portions in which impedance has fallen by applying the current.Type: GrantFiled: March 26, 2009Date of Patent: March 20, 2012Assignee: Panasonic Electric Works Co., Ltd.Inventors: Hirofumi Konishi, Shin Ukegawa, Minoru Maehara, Masanao Okawa, Hirofumi Takaki
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Publication number: 20110169422Abstract: A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start.Type: ApplicationFiled: December 18, 2008Publication date: July 14, 2011Inventors: Masanao Ookawa, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Hirofumi Takaki
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Publication number: 20110101875Abstract: A light emitting device includes: a plurality of light emitting elements configured to emit light when a direct current is supplied thereto; and a direct current power supply circuit configured to supply an electric current of a given level or more to the light emitting elements. The light emitting device further includes: a light emitting element voltage detection circuit configured to detect a voltage applied to the light emitting elements; and a forward/reverse inverting circuit configured, when the light emitting element voltage detection circuit detects an abnormality in a light emitting element, to apply a reverse voltage to the light emitting element in which the abnormality is detected.Type: ApplicationFiled: March 26, 2009Publication date: May 5, 2011Applicant: PANASONIC ELECTRIC WORKS CO., LTD.Inventors: Masanao Okawa, Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi
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Publication number: 20100244704Abstract: It is objected to provide a light control apparatus and a lighting appliance using the same which enable to increase luminous efficiency in the light control and to elongate operative life of a light source. The lighting appliance comprises a light source 1 and a light control apparatus 2. The light control apparatus 2 comprises an electric current output circuit 5 which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, a light control circuit 6 which performs light control of the light source 1 by intermittently supplying the constant electric current outputted from the electric current output circuit, and an electric discharge prevention circuit (diode) 70 which prevents electric discharge of an electric charge charged in capacitive component of the organic electroluminescence device.Type: ApplicationFiled: September 24, 2008Publication date: September 30, 2010Applicant: PANASONIC ELECTRIC WORKS CO., LTD.Inventors: Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Masanao Okawa
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Publication number: 20100219768Abstract: It is an object to provide a light control apparatus and a lighting appliance using the same which enable to increase luminous efficiency in the light control. The lighting appliance includes a light source and a light control apparatus. The light control apparatus includes an electric current output circuit which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, an electric current control circuit which controls an intensity of a driving electric current outputted from the electric current output circuit, and the electric current control circuit biases a direct current component so as to vary the driving electric current periodically between a predetermined maximum value and a predetermined minimum value and flows in the same direction at all times in the light control of the light source.Type: ApplicationFiled: September 24, 2008Publication date: September 2, 2010Applicant: PANASONIC ELECTRIC WORKS CO., LTD.Inventors: Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Masanao Okawa
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Publication number: 20100045193Abstract: Provision of a light emitting device having functionality for restoring to normal even if a low-voltage error occurs, by temporarily applying a reverse current to a low-voltage error light emitting element using a direction inverting circuit, and repairing portions in which impedance has fallen by applying the current.Type: ApplicationFiled: March 26, 2009Publication date: February 25, 2010Inventors: Hirofumi Konishi, Shin Ukegawa, Minoru Maehara, Masanao Okawa, Hirofumi Takaki