Patents by Inventor Yasuhiro Ohshima
Yasuhiro Ohshima 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: 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: 6009245Abstract: Data for C, M, Y and K color nozzle arrays are stored in the same memory area in an image buffer 31'. The data groups, which are to be respectively transmitted to the C, M, Y and K color nozzle arrays at a specific print timing, are stored at continuous addresses in the image buffer 31', as is shown by the shaded portion. In a transfer process, a plurality of bytes for the C, M, Y and K color nozzle arrays, which are at continuous addresses 1 to 20, are read as a data set from the image buffer 31', and at the same time are transmitted to the print head.Type: GrantFiled: March 13, 1998Date of Patent: December 28, 1999Assignee: Seiko Epson CorporationInventors: Takashi Kato, Yasuhiro Ohshima
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Patent number: 5822278Abstract: An electronic time piece senses and warns the electric residue of a secondary cell having electrodes of conductive polymer to a user during the rapid charge.The electronic time piece converts a kinetic energy produced by the user's motion into an electric energy. The electric energy is then outputted from a power generator coil as a charging voltage for charging a chemical reaction type secondary cell. The charged energy in the secondary cell is used to actuate a time piece circuit for indicating the time.The electronic time piece comprises an electric residue sensor unit which outputs an electric residue detection signal when the voltage in the secondary cell continues to exceed a reference voltage corresponding to an electric residue in the secondary cell for a predetermined time during the rapid charge.Type: GrantFiled: September 24, 1997Date of Patent: October 13, 1998Assignee: Seiko Epson CorporationInventors: Yasuhiro Ohshima, Joji Kitahara
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Patent number: 5740132Abstract: An electronic time piece senses and warns the electric residue of a secondary cell having electrodes of conductive polymer to a user during the rapid charge.The electronic time piece converts a kinetic energy produced by the user's motion into an electric energy. The electric energy is then outputted from a power generator coil as a charging voltage for charging a chemical reaction type secondary cell. The charged energy in the secondary cell is used to actuate a time piece circuit for indicating the time.The electronic time piece comprises an electric residue sensor unit which outputs an electric residue detection signal when the voltage in the secondary cell continues to exceed a reference voltage corresponding to an electric residue in the secondary cell for a predetermined time during the rapid charge.Type: GrantFiled: May 11, 1995Date of Patent: April 14, 1998Assignee: Seiko Epson CorporationInventors: Yasuhiro Ohshima, Joji Kitahara