Patents by Inventor Soumei Takahashi
Soumei Takahashi 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: 8884497Abstract: A piezoelectric actuator including first and second piezoelectric cantilevers is disclosed. Wirings are provided on an upper surface of a support body on which the first and second piezoelectric cantilevers are formed. The wirings are formed of patterned metal films.Type: GrantFiled: April 15, 2010Date of Patent: November 11, 2014Assignee: Mitsumi Electric Co., Ltd.Inventors: Soumei Takahashi, Tsuyoshi Ishii, Tsukasa Yamada
-
Publication number: 20120007477Abstract: A piezoelectric actuator including first and second piezoelectric cantilevers is disclosed. Wirings are provided on an upper surface of a support body on which the first and second piezoelectric cantilevers are formed. The wirings are formed of patterned metal films.Type: ApplicationFiled: April 15, 2010Publication date: January 12, 2012Inventors: Soumei Takahashi, Tsuyoshi Ishii, Tsukasa Yamada
-
Patent number: 7956513Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion mounted to the second end portion of the electro-mechanical transducer, and a moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The moving portion is driven by equalizing a constant expanding speed of the electro-mechanical transducer with a constant contracting speed of the electro-mechanical transducer and by setting a constant rest time interval after one of contraction of the electro-mechanical transducer and expansion of the electro-mechanical transducer.Type: GrantFiled: April 17, 2008Date of Patent: June 7, 2011Assignee: Mitsumi Electric Co., Ltd.Inventors: Toyoki Tanaka, Soumei Takahashi, Takahiko Nishiyama
-
Patent number: 7755252Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion mounted to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The stationary member consists essentially of a base alloy which consists of, by weight, 88 to 97% tungsten, 2 to 11% nickel as a binder, and, as the balance, 0.1 to 2% at least one metal having an ionization tendency which is higher than that of tungsten. The stationary member has a surface without nickel plating.Type: GrantFiled: April 17, 2008Date of Patent: July 13, 2010Assignee: Mitsumi Electric Co., Ltd.Inventors: Tsukasa Yamada, Toyoki Tanaka, Takahiko Nishiyama, Soumei Takahashi
-
Patent number: 7732982Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion mounted to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. A frictionally coupled portion has a height (a length of the vibration friction portion in a sliding direction in contact with the moving portion) which is not more than 1.15 mm.Type: GrantFiled: April 17, 2008Date of Patent: June 8, 2010Assignee: Mitsumi Electric Co., Ltd.Inventors: Tsukasa Yamada, Soumei Takahashi
-
Patent number: 7633208Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion coupled to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The vibration friction portion is made of a material having a vibration transfer rate of 4900 meters/second or more. The moving portion is made of a material which has a vibration transfer rate of 4900 meters/second or more and which is different from that of the vibration friction portion.Type: GrantFiled: April 15, 2008Date of Patent: December 15, 2009Assignee: Mitsumi Electric Co., Ltd.Inventors: Tsukasa Yamada, Takahiko Nishiyama, Soumei Takahashi, Toyoki Tanaka
-
Patent number: 7633209Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a static member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion coupled to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The driving device is covered with a cabinet. An elastic member lies between the cabinet and the static member.Type: GrantFiled: April 15, 2008Date of Patent: December 15, 2009Assignee: Mitsumi Electric Co., Ltd.Inventors: Soumei Takahashi, Takahiko Nishiyama
-
Publication number: 20080297004Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion coupled to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The vibration friction portion is made of a material having a vibration transfer rate of 4900 meters/second or more. The moving portion is made of a material which has a vibration transfer rate of 4900 meters/second or more and which is different from that of the vibration friction portion.Type: ApplicationFiled: April 15, 2008Publication date: December 4, 2008Applicant: Mitsumi Electric Co. Ltd.Inventors: Tsukasa Yamada, Takahiko Nishiyama, Soumei Takahashi, Toyoki Tanaka
-
Publication number: 20080265806Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion mounted to the second end portion of the electro-mechanical transducer, and a moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The moving portion is driven by equalizing a constant expanding speed of the electro-mechanical transducer with a constant contracting speed of the electro-mechanical transducer and by setting a constant rest time interval after one of contraction of the electro-mechanical transducer and expansion of the electro-mechanical transducer.Type: ApplicationFiled: April 17, 2008Publication date: October 30, 2008Applicant: Mitsumi Electric Co. Ltd.Inventors: Toyoki Tanaka, Soumei Takahashi, Takahiko Nishiyama
-
Publication number: 20080258579Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion mounted to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. A frictionally coupled portion has a height (a length of the vibration friction portion in a sliding direction in contact with the moving portion) which is not more than 1.15 mm.Type: ApplicationFiled: April 17, 2008Publication date: October 23, 2008Applicant: Mitsumi Electric Co. Ltd.Inventors: Tsukasa Yamada, Soumei Takahashi
-
Publication number: 20080257083Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion mounted to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The stationary member consists essentially of a base alloy which consists of, by weight, 88 to 97% tungsten, 2 to 11% nickel as a binder, and, as the balance, 0.1 to 2% at least one metal having an ionization tendency which is higher than that of tungsten. The stationary member has a surface without nickel plating.Type: ApplicationFiled: April 17, 2008Publication date: October 23, 2008Applicant: Mitsumi Electric Co. Ltd.Inventors: Tsukasa Yamada, Toyoki Tanaka, Takahiko Nishiyama, Soumei Takahashi
-
Publication number: 20080258578Abstract: A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a static member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion coupled to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The driving device is covered with a cabinet. An elastic member lies between the cabinet and the static member.Type: ApplicationFiled: April 15, 2008Publication date: October 23, 2008Applicant: Mitsumi Electric Co. Ltd.Inventors: Soumei Takahashi, Takahiko Nishiyama
-
Publication number: 20060077783Abstract: In a light-emission and reception module for use in an optical pickup, a polarization beam splitter transmits an outgoing laser beam from the laser-emitting element and reflects, as a reflected laser beam, a return laser beam reflected by the optical disc in a direction perpendicular to the outgoing laser beam. The laser-emitting element, the polarization beam splitter, and the photo-detecting element are mounted on the holder. The reflected laser beam is perpendicular to a reception surface of the photo-detecting element.Type: ApplicationFiled: June 29, 2005Publication date: April 13, 2006Applicant: Mitsumi Electric Co., Ltd.Inventors: Tsuyoshi Ishii, Tsukasa Yamada, Soumei Takahashi, Akihiro Yoshizawa
-
Publication number: 20060077780Abstract: An optical pickup unit comprises an objective lens driving device including an objective lens holder, a damper base, and a yoke for forming a magnetic circuit together with coils. The optical pickup unit further comprises an optical base in which the objective lens driving device is assembled and a mirror for entering a laser beam into an optical disc through the objective lens. The yoke comprises a bottom portion and a first rising portion extending upward from an end of the bottom portion near the damper base, and has a first opening extending from the proximal end of the first rising portion to the end opposite from the first rising portion. The optical base comprises a projection extending from the proximal side of the first rising portion within the first opening and a mirror mounting portion provided at the distal end of the projection.Type: ApplicationFiled: June 22, 2005Publication date: April 13, 2006Applicant: Mitsumi Electric Co. Ltd.Inventors: Tsukasa Yamada, Soumei Takahashi
-
Patent number: D476314Type: GrantFiled: December 27, 2001Date of Patent: June 24, 2003Assignee: Mitsumi Electric Co., Ltd.Inventors: Kazutomo Imi, Kenichi Hori, Soumei Takahashi, Kenichi Negoro, Hisamichi Sekine