Patents by Inventor Hirofumi Higashi
Hirofumi Higashi 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).
-
Publication number: 20130269515Abstract: This invention provides a piston in which the moving piston unit can be prevented from rotating with respect the base piston unit, while suppressing the increase of the sliding resistance the piston has with respect to the cylinder. The circumferential wall of the moving piston unit has a pair of skirt parts opposing each other across a piston boss and a pair of side-wall parts coupling the skirt parts and each having an outer circumferential surface concaved toward the central axis X1 of the piston. The side-wall parts have a penetration part each, which penetrates the side-wall part and extends in the directions the moving piston unit reciprocates with respect to the base piston unit. The base piston unit has rotation preventing projections that project perpendicular to the central axis of the piston and are inserted into the penetration parts.Type: ApplicationFiled: December 22, 2011Publication date: October 17, 2013Applicant: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHAInventors: Kazushi Miyamoto, Hirofumi Higashi, Jun Hoshikawa, Akihiro Fujimoto, Noritsugu Ohsawa, Kiminari Kato, Seiji Matsuda
-
Patent number: 8362680Abstract: In a plasma display panel, in which an area percentage of the display electrodes in an area of an image display region of the front panel is expressed by a longitudinal axis, and a difference between a coefficient of expansion of the front substrate from room temperature to 300° C. and a coefficient of expansion of the dielectric layer from room temperature to 300° C. is expressed by a lateral axis, the difference between the coefficients of expansion and the area percentage stay within a region formed by connecting coordinates (35×10?7/° C., 60%), coordinates (8×10?7/° C., 60%), coordinates (5×10?7/° C., 40%), and coordinates (23×10?7/° C., 40%) in the mentioned order with a straight line where the straight line is included.Type: GrantFiled: March 11, 2010Date of Patent: January 29, 2013Assignee: Panasonic CorporationInventors: Kazuhiro Morioka, Morio Fujitani, Hirofumi Higashi, Shinsuke Yoshida, Akira Kawase, Tatsuo Mifune
-
Patent number: 8356986Abstract: A compressor includes a compression mechanism having two opposed end plates, a fixed member disposed between the two end plates, a movable member disposed between the two end plates, a bypass passage, and an opener/closer. The movable member is arranged to eccentrically move about a predetermined rotational axis to compress refrigerant in a compression chamber formed between the fixed member and the movable member. The bypass passageway has an upstream end opened to the compression chamber through which refrigerant is partially ejected from the compression chamber so as to be returned to a suction side of the compression mechanism. The cross section of the upstream end of the bypass passage is preferably elongated circumferentially about the rotational axis. The compression mechanism may include a plurality of bypass passages and a plurality of openers/closers.Type: GrantFiled: January 10, 2008Date of Patent: January 22, 2013Assignee: Daikin Industries, Ltd.Inventors: Hirofumi Higashi, Kazuhiro Furusho
-
Publication number: 20120087819Abstract: A high pressure dome type rotary compressor including a casing and a compression mechanism disposed in the casing to compress gas in a cylinder chamber. The compression mechanism has a discharge port and a discharge valve. The discharge valve is opened in a discharge process and is closed during a period from when the discharge process is finished to when a next compression process is started. The compressor is arranged such that high pressure gas discharged from the discharge port in the discharge process is discharged outside the casing through space in the casing. An oil feed path is arranged to feed lubricant oil contained in a bottom of the casing to an inside of the discharge port in a period from a point in time in the discharge process to when the compression process is started.Type: ApplicationFiled: June 15, 2010Publication date: April 12, 2012Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takashi Shimizu, Kazutaka Hori, Hirofumi Higashi
-
Publication number: 20110083467Abstract: At a time of a heating high-load operation, a harmonic current is flown in an armature winding to induction-heat rare-earth magnets, thus reducing a residual magnetic flux density. Thereby, the number of rotations of a radial gap type motor is improved. The rare-earth magnets are provided near a cooling medium passage extending substantially in parallel with a flow line of a cooling medium, so that the cooling medium recovers heat of the heated rare-earth magnets. At a time of a cooling high-load operation, a greater number of rotations are obtained with respect to the same torque command value, by a field weakening control by means of a current-phase advance.Type: ApplicationFiled: June 8, 2009Publication date: April 14, 2011Inventors: Yoshinari Asano, Tomomi Sakamoto, Nobuyuki Kifuji, Hirofumi Higashi, Shintarou Araki
-
Publication number: 20110062854Abstract: In a plasma display panel, in which an area percentage of the display electrodes in an area of an image display region of the front panel is expressed by a longitudinal axis, and a difference between a coefficient of expansion of the front substrate from room temperature to 300° C. and a coefficient of expansion of the dielectric layer from room temperature to 300° C. is expressed by a lateral axis, the difference between the coefficients of expansion and the area percentage stay within a region formed by connecting coordinates (35×10?7/° C., 60%), coordinates (8×10?7/° C., 60%), coordinates (5×10?7/° C., 40%), and coordinates (23×10?7/° C., 40%) in the mentioned order with a straight line where the straight line is included.Type: ApplicationFiled: March 11, 2010Publication date: March 17, 2011Inventors: Kazuhiro Morioka, Morio Fujitani, Hirofumi Higashi, Shinsuke Yoshida, Akira Kawase, Tatsuo Mifune
-
Patent number: 7789634Abstract: A reed valve and a valve retainer for the reed valve are provided at a discharge port of a compression mechanism that compresses fluid. The valve retainer has a polymer actuator at an end part of a valve fixing part for fixing the reed valve. The polymer actuator expands or contracts in length to change a fixed length of the reed valve, thereby changing a rigidity of the reed valve. This attains appropriate control of responsiveness of the reed valve according to the volume.Type: GrantFiled: December 10, 2004Date of Patent: September 7, 2010Assignee: Daikin Industries, Ltd.Inventors: Hirofumi Higashi, Masanori Masuda, Katsumi Sakitani
-
Patent number: 7739987Abstract: The variable valve gear for an internal combustion engine includes a cam lobe that is rotatably supported by a cam drive shaft, and a variable valve mechanism that includes a drive arm fixed adjacent to one end of the cam lobe in the cam drive shaft, an eccentric shaft member that is swivelably supported at a position opposite to the cam lobe with respect to the drive arm in the cam drive shaft, has an outer circumferential surface eccentric to an axis of the cam drive shaft, and is adjustable in eccentricity, and an intermediate rotary member that is rotatably supported through a bearing member around the eccentric shaft member, and is connected to the drive arm, wherein the drive arm includes an end face that overlaps with an end face of the bearing member, when projecting along the axis of the cam drive shaft, and the end face of the drive arm is protruding further than the end face of the cam lobe toward the bearing member.Type: GrantFiled: November 24, 2008Date of Patent: June 22, 2010Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Jidosha Engineering Kabushiki KaishaInventors: Jun Hoshikawa, Hirofumi Higashi, Akibiro Fujimoto, Noritsugu Ohsawa, Tetsuji Tatsumi, Tomoyuki Muraoka, Hideo Nakai
-
Publication number: 20100111737Abstract: A compressor includes a compression mechanism having two opposed end plates, a fixed member disposed between the two end plates, a movable member disposed between the two end plates, a bypass passage, and an opener/closer. The movable member is arranged to eccentrically move about a predetermined rotational axis to compress refrigerant in a compression chamber formed between the fixed member and the movable member. The bypass passageway has an upstream end opened to the compression chamber through which refrigerant is partially ejected from the compression chamber so as to be returned to a suction side of the compression mechanism. The cross section of the upstream end of the bypass passage is preferably elongated circumferentially about the rotational axis. The compression mechanism may include a plurality of bypass passages and a plurality of openers/closers.Type: ApplicationFiled: January 10, 2008Publication date: May 6, 2010Applicant: Daikin Industries, Ltd.Inventors: Hirofumi Higashi, Kazuhiro Furusho
-
Publication number: 20090241877Abstract: The variable valve gear for an internal combustion engine includes a cam lobe that is rotatably supported by a cam drive shaft, and a variable valve mechanism that includes a drive arm fixed adjacent to one end of the cam lobe in the cam drive shaft, an eccentric shaft member that is swivelably supported at a position opposite to the cam lobe with respect to the drive arm in the cam drive shaft, has an outer circumferential surface eccentric to an axis of the cam drive shaft, and is adjustable in eccentricity, and an intermediate rotary member that is rotatably supported through a bearing member around the eccentric shaft member, and is connected to the drive arm, wherein the drive arm includes an end face that overlaps with an end face of the bearing member, when projecting along the axis of the cam drive shaft, and the end face of the drive arm is protruding further than the end face of the cam lobe toward the bearing member.Type: ApplicationFiled: November 24, 2008Publication date: October 1, 2009Inventors: Jun HOSHIKAWA, Hirofumi HIGASHI, Akibiro FUJIMOTO, Noritsugu OHSAWA, Tetsuji TATSUMI, Tomoyuki MURAOKA, Hideo NAKAI
-
Publication number: 20090241873Abstract: A variable valve-operating system for an internal combustion engine, comprising a cylinder head having an intake or exhaust valve, a camshaft rotatably supported by the cylinder head, a cam body rotatably fitted around the camshaft and including a cam lobe having an outer peripheral surface for driving the valve and a boss protruding radially from the cam body, and a valve open period-varying mechanism supported on the camshaft and including an intermediate rotating member having a center of rotation offset from the camshaft, the mechanism transmits rotation of the camshaft to the boss of the cam body through the intermediate rotating member and also permits the valve open period of the valve to be varied through adjustment of the eccentric phase angle of the intermediate rotating member, wherein at least a part of the boss is so positioned as to overlap with the profile of a nose of the cam lobe when viewed in the axial direction of the cam body.Type: ApplicationFiled: January 29, 2009Publication date: October 1, 2009Inventors: Tomoyuki Muraoka, Hirofumi Higashi, Hideo Nakai, Akihiro Fujimoto, Jun Hoshikawa, Noritsugu Ohsawa, Tetsuji Tatsumi
-
Patent number: 7364418Abstract: A scroll fluid machine includes a stationary scroll having a spiral wrap formed on an end plate and a moving scroll having a spiral wrap formed on an end plate. A polymer actuator for adjusting the amount of space between the wrap and the end plate is disposed in a recess formed at a tip of the wrap. The polymer actuator changes its shape along a height of the wrap to adjust an amount of the space. The polymer actuator also functions as a seal between the end plate and the wrap. The recess is formed such that a wall of the recess including an inner circumference surface of the wrap has a thickness different from that of a wall of the recess including an outer circumference surface of the wrap.Type: GrantFiled: November 29, 2004Date of Patent: April 29, 2008Assignee: Daikin Industries, Ltd.Inventors: Masanori Masuda, Hirofumi Higashi, Katsumi Sakitani
-
Publication number: 20070148025Abstract: A reed valve and a valve retainer for the reed valve are provided at a discharge port of a compression mechanism that compresses fluid. The valve retainer has a polymer actuator at an end part of a valve fixing part for fixing the reed valve. The polymer actuator expands or contracts in length to change a fixed length of the reed valve, thereby changing a rigidity of the reed valve. This attains appropriate control of responsiveness of the reed valve according to the volume.Type: ApplicationFiled: December 10, 2004Publication date: June 28, 2007Applicant: Daikin Industries, Ltd.Inventors: Hirofumi Higashi, Katsumi Sakitani
-
Publication number: 20070148026Abstract: A reed valve for opening and closing a discharge port of a compressor mechanism is provided with a protruding part which is formed at a distal end thereof to come in and out of the discharge port. The shape of the discharge port and the shape of the reed valve are determined such that flow passage areas S0, S1 and S2 at different parts of the discharge port satisfy S2?S1?S0 when the reed valve is lifted to a maximum level. Accordingly, a refrigerant is discharged through the discharge port without reducing the amount of flow of the refrigerant, thereby reducing loss of pressure.Type: ApplicationFiled: December 16, 2004Publication date: June 28, 2007Inventor: Hirofumi Higashi
-
Publication number: 20070104604Abstract: A scroll fluid machine includes a stationary scroll having a spiral wrap formed on an end plate and a moving scroll having a spiral wrap formed on an end plate. A polymer actuator for adjusting the amount of space between the wrap and the end plate is disposed in a recess formed at a tip of the wrap. The polymer actuator changes its shape along a height of the wrap to adjust an amount of the space. The polymer actuator also functions as a seal between the end plate and the wrap. The recess is formed such that a wall of the recess including an inner circumference surface of the wrap has a thickness different from that of a wall of the recess including an outer circumference surface of the wrap.Type: ApplicationFiled: November 29, 2004Publication date: May 10, 2007Applicant: Daikin Industries, Ltd.Inventors: Masanori Masuda, Hirofumi Higashi, Katsumi Sakitani
-
Patent number: 7059344Abstract: A discharge valve mechanism has a plurality of discharge openings. The discharge openings are placed in an open or closed state by a plate-like valve element. Each of the discharge openings is formed at a respective location between a base end side and a leading end side of the valve element. The number of discharge openings to be placed in the open state is varied depending on the pressure and the flow rate of gas refrigerant discharged from a compression chamber.Type: GrantFiled: March 5, 2004Date of Patent: June 13, 2006Assignee: Daikin Industries, Ltd.Inventors: Yoshitaka Shibamoto, Hirofumi Higashi, Yoshinori Asano, Takashi Shimizu, Kazutaka Hori
-
Patent number: 6979950Abstract: A plurality of row electrode pairs and a dielectric layer are formed on a front glass substrate. A plurality of column electrodes forming discharge cells at the intersections with the row electrode pairs in a discharge space is formed on one of a back glass substrate and the front glass substrate. Each of the discharge cells is defined and separated from another discharge cell adjacent thereto in the column direction by a transverse wall of the partition wall provided between the front glass substrate and the back glass substrate. A black- or dark-colored light absorption layer facing the front glass substrate is formed in each non-light emission area including the transverse walls in the discharge space.Type: GrantFiled: September 30, 2003Date of Patent: December 27, 2005Assignees: Pioneer Corporation, Pioneer Display Products CorporationInventors: Taro Naoi, Hirofumi Higashi, Shingo Ogane, Hiroaki Watanabe
-
Publication number: 20050175494Abstract: A discharge valve mechanism has discharge openings. The number of discharge openings to be placed in the open state is varied depending on the pressure and the flow rate of gas refrigerant discharged from a compression chamber. Accordingly, the occurrence of overcompression losses at the time of controlling of the variable displacement of a compressor is inhibited during the operation from small to large displacement. This achieves improvements in compressor operating efficiency.Type: ApplicationFiled: March 5, 2004Publication date: August 11, 2005Applicant: Daikin Industries, Ltd.Inventors: Yoshitaka Shibamoto, Hirofumi Higashi, Yoshinari Asano, Takashi Shimizu, Kazutaka Hori
-
Patent number: 6815149Abstract: Provision of a manufacturing method for forming lamination of a plurality of dielectric layers on a substrate of a plasma display panel. A forming process for forming a photosensitive glass material layer and a patterning process for exposing required regions of the resulting photosensitive glass material layer to light are repeated in each formation of a first photosensitive glass material layer L1 and a second photosensitive glass material layer L2. After completion of the individual forming process and the individual patterning process for each of the first and second photosensitive glass material layers L1 and L2, a developing process for removing the unexposed regions and a burning process following the developing process are each performed on both of the first and second photosensitive glass material layers L1 and L2 together.Type: GrantFiled: March 11, 2003Date of Patent: November 9, 2004Assignees: Pioneer Corporation, Pioneer Display Products CorporationInventors: Hirofumi Higashi, Shingo Ogane
-
Publication number: 20040189203Abstract: A plurality of row electrode pairs and a dielectric layer are formed on a front glass substrate. A plurality of column electrodes forming discharge cells at the intersections with the row electrode pairs in a discharge space is formed on one of a back glass substrate and the front glass substrate. Each of the discharge cells is defined and separated from another discharge cell adjacent thereto in the column direction by a transverse wall of the partition wall provided between the front glass substrate and the back glass substrate. A black- or dark-colored light absorption layer facing the front glass substrate is formed in each non-light emission area including the transverse walls in the discharge space.Type: ApplicationFiled: September 30, 2003Publication date: September 30, 2004Applicant: Pioneer Corporation and Pioneer Display Products CorporationInventors: Taro Naoi, Hirofumi Higashi, Shingo Ogane, Hiroaki Watanabe