Patents by Inventor Hisateru Akachi
Hisateru Akachi 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: 6026890Abstract: A heat exchanger utilizes a multi-hole flexible band of light metal which is formed, by extrusion, with a plurality of longitudinal small holes extending in parallel to one another from one band end to the other end. The longitudinal holes are connected at each of the end portions of the band, and both ends of the band is closed by welding to form a sealed cavity partly filled with a working fluid in partial vacuum. The sealed cavity may be in the form of a single long continuous passage, or in the form of parallel passages connected together at both ends. The multi-hole band is bent in such a shape that the band meanders between a high temperature region and a low temperature region. The thus-constructed heat exchanger is advantageous in heat exchanging performance, and capable of reducing the manufacturing and material costs, the weight of the heat exchanger, and improving the reliability.Type: GrantFiled: June 25, 1996Date of Patent: February 22, 2000Assignees: Actronics Kabushiki Kaisha, Hisateru AkachiInventor: Hisateru Akachi
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Patent number: 5808387Abstract: It is an object of the present invention to provide an electric motor for an electric vehicle with an improved cooling capacity by causing coils wound around a stator to serve as a tubular heat pipe type heat transfer device. An electric motor for an electric vehicle includes a stator 11, coils 12 wound around at least the stator, and a rotor 13 being rotated by an induction field developed around the coils 12. In one embodiment of the invention the coils 12 are formed of a tubular container 121 which is filled with a working fluid which vibrates in an axial direction of a tube by nuclear boiling generated at a high temperature portion of the coils 12. The coils themselves are arranged as a non-looped tubular heat pipe type heat transfer device.Type: GrantFiled: October 24, 1995Date of Patent: September 15, 1998Assignees: Actronics Co., Ltd., Nissan Motor Co., Ltd.Inventors: Hisateru Akachi, Tatsuyuki Yamamoto, Hiroshi Yamashita
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Patent number: 5737840Abstract: A tunnel-plate type heat pipe is manufactured out of a tube having capillary parallel tunnels defined by partitions through shaping both ends of the tube, forming recesses in the partitions in the vicinity of each end of the tube, closing both ends of the tube to form a capillary tunnel container, cleaning the capillary tunnel container, and charging the capillary tunnel container with a predetermined amount of working fluid.Type: GrantFiled: July 9, 1996Date of Patent: April 14, 1998Assignees: Actronics Kabushiki Kaisha, Hisateru AkachiInventor: Hisateru Akachi
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Patent number: 5697428Abstract: A heat pipe comprises an unit plate having one side formed with a groove which includes a plurality of straight portions arranged in parallel with each other and a plurality of turnings, and a flat plate disposed on the one side of the unit plate.Type: GrantFiled: December 2, 1994Date of Patent: December 16, 1997Assignees: Actronics Kabushiki Kaisha, Hisateru AkachiInventor: Hisateru Akachi
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Patent number: 5642775Abstract: A ribbon-like plate heat pipe comprises a ribbon-like plate having tunnels arranged parallel to each other and defined by partitions. The ribbon-like plate has both ends closed such that the tunnels are filled with melt metal up to a predetermined depth from each end of the ribbon-like plate upon welding or soldering. The partitions are alternately eliminated by a predetermined length in the vicinity of the ends of the ribbon-like plate so as to ensure communication of the tunnels with each other to form a serpentine container having a predetermined turns. The serpentine container is filled with a predetermined amount of working fluid.Type: GrantFiled: February 16, 1996Date of Patent: July 1, 1997Assignees: Actronics Kabushiki Kaisha, Hisetaru AkachiInventor: Hisateru Akachi
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Patent number: 5507092Abstract: A heat sink comprising a belt-shaped member arranged on a heat radiating side of a heat receiving plate and having one side having a plurality of script's l-shaped pinlike portions. The belt-shaped member includes a capillary heat pipe.Type: GrantFiled: June 6, 1995Date of Patent: April 16, 1996Assignees: Hisateru Akachi, Actronics Kabushiki KaishaInventor: Hisateru Akachi
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Patent number: 5490558Abstract: A heat sink comprising a belt-shaped member arranged on a heat radiating side of a heat receiving plate and having one side having a plurality of script's l-shaped pinlike portions. The belt-shaped member includes a capillary heat pipe.Type: GrantFiled: June 4, 1993Date of Patent: February 13, 1996Assignee: Actronics Kabushiki KaishaInventor: Hisateru Akachi
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Patent number: 5219020Abstract: A structure of a heat pipe applicable to a heat transportation device is disclosed in which an elongate metallic capillary tube is formed having an inner diaeter sufficiently small to enable movement of a bi-phase compressible working fluid having a predetrmined quantity and sealed into the metallic capillary container in a filled and closed state, a plurality of heat receiving portions and heat radiating portions being on predetermined parts of the elongate metallic tube and alternatingly arranged thereat. Both terminals of the metallic elongate capillary tube are heretically sealed thereat or hermetically connected to form a loop-type flow passage of the bi-phase compressible working fluid. In addition, no flow direction limiting mechanism such as check valves is essentially eliminated.Type: GrantFiled: August 15, 1991Date of Patent: June 15, 1993Assignee: Actronics Kabushiki KaishaInventor: Hisateru Akachi
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Patent number: 4921041Abstract: A structure of a loop-type heat pipe is disclosed in which a heat carrying fluid, preferably a bi-phase non-condensative fluid, circulates in a loop form in itself under its own vapor pressure at a high speed within an elongate pipe so as to repeat vaporization and condensation, thus carrying out a heat transfer. A structure of the loop-type heat pipe includes the elongate pipe, both ends thereof being air-tightly interconnected to form a loop-type container, the heat carrying fluid, at least one heat receiving portion and at least one heat radiating portion, both being placed at given portions of a elongate pipe, and at least one check valve for limiting a stream direction of the heat carrying fluid.Type: GrantFiled: June 15, 1988Date of Patent: May 1, 1990Assignee: Actronics Kabushiki KaishaInventor: Hisateru Akachi
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Patent number: 4012894Abstract: A conductor twisting system for twisting a running wire conductor comprising at least a set of combined rolls of which the axes are relatively oriented at such an angle that the two component forces resolved from a force of each of rolls acting on the conductor running therebetween are utilized for causing the conductor to rectilinearly travel and rotate in a direction normal to the conductor travel direction, and means for fixing the twist imparted on the running conductor immediately before the twist is untwisted by a twisting stress produced in the running conductor in association with the twist, whereby a high conductor twisting rate is attained with a simple construction.Type: GrantFiled: February 21, 1975Date of Patent: March 22, 1977Assignee: Oki Densen Kabushiki KaishaInventors: Hisateru Akachi, Hideo Miyajima, Mitsuro Yaguchi