Patents by Inventor Shunichi Mitsuya
Shunichi Mitsuya 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: 6406279Abstract: A displacement type fluid machine has a sliding contact portion between a cylinder 4 and a displacer 5 made into a predetermined section, and the cylinder and the displacer so contoured that when they are made concentric, the normal distance in the sliding contact section between the cylinder contour and the displacer contour may be smaller than that of the remaining section, thereby to decrease the radial gap to lower the internal leakage of the working fluid and to improve the performance and the reliability.Type: GrantFiled: March 16, 2001Date of Patent: June 18, 2002Assignee: Hitachi, Ltd.Inventors: Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Hiroaki Hata, Yasuhiro Ohshima, Kenji Tojo
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Patent number: 6312237Abstract: In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer 5 and a cylinder 4 are fed with a lubricating oil 12 by forming an oil-feeding groove 5c in the surface of the displacer 5 so as to extend from the central portion of the displacer 5 to the vicinity of a suction port 7a, and feeding the lubricating oil 12 from the central portion of the displacer 5, so that the wear can be reduced.Type: GrantFiled: March 6, 2001Date of Patent: November 6, 2001Assignee: Hitachi, Ltd.Inventors: Takeshi Kouno, Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Shigetaro Tagawa, Yasuhiro Ohshima, Kingo Moriyama
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Publication number: 20010010800Abstract: A displacement type fluid machine has a sliding contact portion between a cylinder 4 and a displacer 5 made into a predetermined section, and the cylinder and the displacer so contoured that when they are made concentric, the normal distance in the sliding contact section between the cylinder contour and the displacer contour may be smaller than that of the remaining section, thereby to decrease the radial gap to lower the internal leakage of the working fluid and to improve the performance and the reliability.Type: ApplicationFiled: March 16, 2001Publication date: August 2, 2001Inventors: Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Hiroaki Hata, Yasuhiro Ohshima, Kenji Tojo
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Publication number: 20010008610Abstract: In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer 5 and a cylinder 4 are fed with a lubricating oil 12 by forming an oil-feeding groove 5c in the surface of the displacer 5 so as to extend from the central portion of the displacer 5 to the vicinity of a suction port 7a, and feeding the lubricating oil 12 from the central portion of the displacer 5, so that the wear can be reduced.Type: ApplicationFiled: March 6, 2001Publication date: July 19, 2001Inventors: Takeshi Kouno, Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Shigetaro Tagawa, Yasuhiro Ohshima, Kingo Moriyama
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Patent number: 6220841Abstract: In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer 5 and a cylinder 4 are fed with a lubricating oil 12 by forming an oil-feeding groove 5c in the surface of the displacer 5 so as to extend from the central portion of the displacer 5 to the vicinity of a suction port 7a, and feeding the lubricating oil 12 from the central portion of the displacer 5, so that the wear can be reduced.Type: GrantFiled: March 16, 1999Date of Patent: April 24, 2001Assignee: Hitachi, Ltd.Inventors: Takeshi Kouno, Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Shigetaro Tagawa, Yasuhiro Ohshima, Kingo Moriyama
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Patent number: 6217303Abstract: An orbiting fluid machine has a feature that the speed of sliding movement is low, while vibrations are small, its performance is lowered when the rotational speed becomes high, and this problem is resolved by the following structure. A displacement fluid machine includes a displacer making an orbital motion within a casing into which a working fluid is drawn, thereby drawing and discharging the working fluid, in which an oil retaining mechanism or a seal mechanism is provided at each of opposite end surfaces of the displacer. This results that, axial gaps at the end surfaces of the displacer are effectively sealed so as to reduce a leakage loss, thereby achieving a high performance and a high reliability.Type: GrantFiled: July 6, 2000Date of Patent: April 17, 2001Assignee: Hitachi, Ltd.Inventors: Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Hiroaki Hata, Kenichi Oshima, Yasuhiro Oshima
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Patent number: 6213743Abstract: A conventional displacement type fluid machine is featured by a low sliding rate and in low vibrations and pulsations, but has a problem, that the radial gap in a displacer sliding portion is enlarged by the clearance of a shaft drive system and a rotating moment acting on a displacer so that the internal leakage of a working fluid is increased to lower the performance and the reliability. To eliminate this problem, the sliding contact portion between a cylinder 4 and a displacer 5 is made into a predetermined section, and the cylinder and the displacer are so contoured that when they are made concentric, the normal distance in the sliding contact section between the cylinder contour and the displacer contour may be smaller than that of the remaining section, thereby to decrease the radial gap to lower the internal leakage of the working fluid and to improve the performance and the reliability.Type: GrantFiled: March 19, 1999Date of Patent: April 10, 2001Assignee: Hitachi, Ltd.Inventors: Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Hiroaki Hata, Yasuhiro Ohshima, Kenji Tojo
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Patent number: 6183228Abstract: A displacement type fluid machine in which a displacer and a cylinder are disposed between end plates, a space is formed by an inner wall surface of the cylinder and an outer wall surface of the displacer when the center of the displacer is put on the center of the cylinder, and a plurality of spaces is formed when the positional relationship between the displacer and the cylinder is for a gyration, is restrained from deterioration of the efficiency. One of the end plates and a vane protruding inwardly from the inside surface of the cylinder are fixed to each other so as to restrain the deformation of the vane and decrease the leakage of a working fluid due to the deformation.Type: GrantFiled: July 29, 1998Date of Patent: February 6, 2001Assignee: Hitachi, Ltd.Inventors: Shigeru Machida, Hirokatsu Kohsokabe, Shunichi Mitsuya, Yuji Yoshitomi, Masahiro Takebayashi, Koichi Inaba, Hiroaki Hata
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Patent number: 6179593Abstract: Side wall surface of an orbiting piston and inner wall surface of a cylinder define therebetween a plurality of working chambers, a space for compressing (discharging) a working fluid is defined between spaces for sucking thereinto the working fluid among the working chambers in any operating condition, and one of end plates, between which the orbiting piston is axially interposed, is formed with suction ports or discharge ports while the other of end plates, opposing the end plate formed with the suction or discharge ports, is formed with holes, whereby it is possible to provide a highly efficient and reliable displacement fluid machine which can stabilize pressure balance in the working chambers, and which can greatly reduce fluid loss during discharge stroke.Type: GrantFiled: March 19, 1998Date of Patent: January 30, 2001Assignee: Hitachi, Ltd.Inventors: Shunichi Mitsuya, Hirokatsu Kohsokabe, Masahiro Takebayashi, Koichi Inaba, Hiroaki Hata, Kenji Tojo
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Patent number: 6152714Abstract: A conventional displacement type fluid machine involves a problem that a mechanical friction loss and leakage in sliding portions are large, so that its reliability and performance are poor, and therefore it has not yet been put into practical use. In a displacement type fluid machine, a displacer makes an orbital motion within a cylinder to draw and discharge a working fluid. An compression element includes the displacer of a specified configuration, and the cylinder engaged with this displacer, and a connecting member (rotation prevention member), which abuts against the displacer and the cylinder, is provided inwardly of compression working chambers. With this construction, a rotating moment acting on the displacer can be completely avoided, thereby achieving the high efficiency and the high reliability.Type: GrantFiled: September 18, 1997Date of Patent: November 28, 2000Assignee: Hitachi, Ltd.Inventors: Shunichi Mitsuya, Hirokatsu Kohsokabe, Masahiro Takebayashi, Koichi Inaba, Hiroaki Hata, Kenji Tojo
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Patent number: 6099279Abstract: An orbiting fluid machine has a feature that the speed of sliding movement is low, while vibrations are small, its performance is lowered when the rotational speed becomes high, and this problem is resolved by the following structure. A displacement fluid machine includes a displacer making an orbital motion within a casing into which a working fluid is drawn, thereby drawing and discharging the working fluid, in which an oil retaining mechanism or a seal mechanism is provided at each of opposite end surfaces of the displacer. This results that, axial gaps at the end surfaces of the displacer are effectively sealed so as to reduce a leakage loss, thereby achieving a high performance and a high reliability.Type: GrantFiled: September 18, 1997Date of Patent: August 8, 2000Assignee: Hitachi, Ltd.Inventors: Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Hiroaki Hata, Kenichi Oshima, Yasuhiro Oshima
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Patent number: 5960697Abstract: An axial piston machine comprises first and second members arranged so that one of the first and second members is swingable relative to the other to provide relative swinging motion, a plurality of pistons inserted in a plurality of cylinders formed in the second member, respectively, the pistons being mechanically engaged with the first member so that the relative swinging motion reciprocates the plurality of pistons in the cylinders, and a swinging mechanism for swinging the above-mentioned one of the first and second members relative to the other, and the axial piston machine is characterized in that the first and second members have spherical portions providing a coupling portion binding one of the first and second members to a spherical point of the other to be universally rotatable about the point, and the above-mentioned swinging mechanism comprises a relative revolving mechanism for revolving at least one of the first and second members relative to the other to provide a relative swinging motion betwType: GrantFiled: February 26, 1998Date of Patent: October 5, 1999Assignee: Hitachi, Ltd.Inventors: Isao Hayase, Shunichi Mitsuya, Takeshi Tsuchiya, Yuzo Kadomukai, Yukio Takahashi
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Patent number: 5531577Abstract: A scroll type fluid machine includes a lever 26 moved to draw a conical locus so that revolution is given to an orbiting scroll member 2, to thereby lower a sliding load and a sliding speed of a sliding portion on which a load is acted in a radial direction by the above principle. Further, the orbiting scroll member is supported in a thrust direction by a thrust force transmission member 50 interposed between the orbiting scroll member 2 and a fixed scroll member 1 to thereby lower a sliding speed of the sliding portion on which a load is acted in the thrust direction. With this arrangement, a scroll type fluid machine having high efficiency and durability can be provided.Type: GrantFiled: January 24, 1994Date of Patent: July 2, 1996Assignee: Hitachi, Ltd.Inventors: Isao Hayase, Shigeru Machida, Shunichi Mitsuya, Takeshi Kouno
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Patent number: 5062012Abstract: A magnetic disk apparatus capable of reducing the vibration thereof is disclosed, in which a linear access mechanism for driving a magnetic head is provided with anti-reaction force generating means for generating an anti-reaction force capable of offsetting a reaction force generated in driving a carriage mounted with the magnetic head.Type: GrantFiled: March 16, 1989Date of Patent: October 29, 1991Assignee: Hitach, Ltd.Inventors: Naoki Maeda, Yozo Nakamura, Yuzo Kadomukai, Shunichi Mitsuya, Tsuyoshi Takahashi, Jun Naruse