Patents by Inventor Jin Sakamoto
Jin Sakamoto 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).
-
Patent number: 7775041Abstract: A Stirling engine, wherein the inner yoke of a linear motor is installed on the outer peripheral surface of a cylinder. To keep a proper pressure balance between a compression space on one end side of a displacer and a back pressure space on the outer peripheral side of the cylinder, a first flow passage is formed in the piston starting at the compression space side end face toward the outer peripheral surface and a second flow passage allowing the first flow passage to communicate with the back pressure space is formed in the cylinder. The second flow passage is composed of a through hole that penetrates the wall of the cylinder in a radial direction and a communication passage formed between the outer peripheral surface of the cylinder and the inner peripheral surface of the inner yoke to allow the through hole to communicate with the back pressure space.Type: GrantFiled: January 17, 2006Date of Patent: August 17, 2010Assignee: Sharp Kabushiki KaishaInventors: Yoshiyuki Kitamura, Kazushi Yoshimura, Kenji Takai, Shinji Yamagami, Jin Sakamoto
-
Patent number: 7571606Abstract: A Stirling engine A has a pressure container 1 filled with a working gas, a cylinder 2 secured inside the pressure container 1, a power piston 3 provided inside the cylinder 2, and a displacer 4a provided inside the cylinder 2 on the same axis as the power piston 3. The displacer 4 has a displacer piston 41a that slides inside the cylinder 2, and a rod 42a which is connected and fixed to the displacer piston 41a and placed through a slide hole 31 formed at the center of the power piston 3. The rod 42a is formed in the shape of a hollow pipe.Type: GrantFiled: March 18, 2004Date of Patent: August 11, 2009Assignee: Sharp Kabushiki KaishaInventors: Jin Sakamoto, Kazushi Yoshimura, Shinji Yamagami, Yoshiyuki Kitamura, Hiroshi Yasumura
-
Publication number: 20080282694Abstract: A Stirling engine, wherein the inner yoke of a linear motor is installed on the outer peripheral surface of a cylinder. To keep a proper pressure balance between a compression space on one end side of a displacer and a back pressure space on the outer peripheral side of the cylinder, a first flow passage is formed in the piston starting at the compression space side end face toward the outer peripheral surface and a second flow passage allowing the first flow passage to communicate with the back pressure space is formed in the cylinder. The second flow passage is composed of a through hole that penetrates the wall of the cylinder in a radial direction and a communication passage formed between the outer peripheral surface of the cylinder and the inner peripheral surface of the inner yoke to allow the through hole to communicate with the back pressure space.Type: ApplicationFiled: January 17, 2006Publication date: November 20, 2008Inventors: Yoshiyuki Kitamura, Kazushi Yoshimura, Kenji Takai, Shinji Yamagami, Jin Sakamoto
-
Publication number: 20070151239Abstract: A Stirling engine A has a pressure container 1 filled with a working gas, a cylinder 2 secured inside the pressure container 1, a power piston 3 provided inside the cylinder 2, and a displacer 4a provided inside the cylinder 2 on the same axis as the power piston 3. The displacer 4 has a displacer piston 41a that slides inside the cylinder 2, and a rod 42a which is connected and fixed to the displacer piston 41a and placed through a slide hole 31 formed at the center of the power piston 3. The rod 42a is formed in the shape of a hollow pipe.Type: ApplicationFiled: March 18, 2004Publication date: July 5, 2007Inventors: Jin Sakamoto, Kazushi Yoshimura, Shinji Yamagami, Yoshiyuki Kitamura, Hiroshi Yasumura
-
Publication number: 20070089410Abstract: In a Stirling engine, a hollow cylinder-like pressure vessel covers a cylinder, a piston, and a linear motor. The pressure vessel is divided into a ring-like portion and a dome-like portion at a position closer to the displacer installation side than a piston support-side end of the linear motor. At the divided portion, an outward-facing flange-shaped portion is formed for each of the ring-like portion and the dome-like portion. For temporary sealing of the pressure vessel, both flange-shaped portions are joined together and tightened by tightening rings and bolts. A performance check is performed in this state, and then outer peripheral portions of the flange-shaped portions are welded together for final sealing.Type: ApplicationFiled: June 29, 2004Publication date: April 26, 2007Applicant: SHARP KABUSHIKI KAISHAInventors: Kazushi Yoshimura, Kenji Takai, Yoshiyuki Kitamura, Shinji Yamagami, Jin Sakamoto, Hiroshi Yasumura
-
Patent number: 7168248Abstract: A Stirling engine, wherein when a linear motor reciprocatingly move a piston in a cylinder, a displacer also reciprocatingly moves in the cylinder storing the displacer. By this, working mixture moves between a compression space and an expansion space. Though a spring for generating resonance is combined with the displacer, a spring for generating resonance for the piston is eliminated. Gas bearings are installed for the piston at two or more positions at specified intervals in the axial direction. An inside flange formed at the end of the cylinder and a stopper plate fixed to the linear motor determine the moving limit of the piston. Since a pin projected from the stopper plate is received by a through hole in a magnet holder, the piston can be prevented from being rotated.Type: GrantFiled: July 20, 2004Date of Patent: January 30, 2007Assignee: Sharp Kabushiki KaishaInventors: Jin Sakamoto, Kazushi Yoshimura, Kenji Takai, Shinji Yamagami, Yoshiyuki Kitamura, Hiroshi Yasumura, Hirotaka Ohno
-
Publication number: 20060137339Abstract: A Stirling engine, wherein when a linear motor reciprocatingly move a piston in a cylinder, a displacer also reciprocatingly moves in the cylinder storing the displacer. By this, working mixture moves between a compression space and an expansion space. Though a spring for generating resonance is combined with the displacer, a spring for generating resonance for the piston is eliminated. Gas bearings are installed for the piston at two or more positions at specified intervals in the axial direction. An inside flange formed at the end of the cylinder and a stopper plate fixed to the linear motor determine the moving limit of the piston. Since a pin projected from the stopper plate is received by a through hole in a magnet holder, the piston can be prevented from being rotated.Type: ApplicationFiled: July 20, 2004Publication date: June 29, 2006Inventors: Jin Sakamoto, Kazushi Yoshimura, Kenji Takai, Shinji Yamagami, Yoshiyuki Kitamura, Hiroshi Yasumura, Hirotaka Ohno
-
Patent number: 6698210Abstract: A cooler box includes a box member that has a hermetically closable cooling chamber formed inside it and that insulates heat and a cooling device that cools the interior of the cooling chamber. The cooling device is a Stirling-cycle refrigerator. Here, using a Stirling-cycle refrigerator as the cooling device helps realize a cooler box that can be operated from an easily available low-capacity, inexpensive power supply and that can cool a to-be-cooled article to a low temperature comparable with that produced by a freezer.Type: GrantFiled: October 25, 2002Date of Patent: March 2, 2004Assignee: Sharp Kabushiki KaishaInventors: Yoshiaki Ogura, Jin Sakamoto, Atsuko Sakai
-
Publication number: 20030101733Abstract: A cooler box includes a box member that has a hermetically closable cooling chamber formed inside it and that insulates heat and a cooling device that cools the interior of the cooling chamber. The cooling device is a Stirling-cycle refrigerator. Here, using a Stirling-cycle refrigerator as the cooling device helps realize a cooler box that can be operated from an easily available low-capacity, inexpensive power supply and that can cool a to-be-cooled article to a low temperature comparable with that produced by a freezer.Type: ApplicationFiled: October 25, 2002Publication date: June 5, 2003Inventors: Yoshiaki Ogura, Jin Sakamoto, atsuko Sakai