The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2011
Filed:
Jun. 09, 2005
Akira Murakami, Gotenba, JP;
Makoto Funahashi, Gotenba, JP;
Shinichi Ito, Susono, JP;
Toshihiro Aoyama, Susono, JP;
Michio Yoshida, Susono, JP;
Ryuji Ibaraki, Susono, JP;
Takashi Kuwabara, Susono, JP;
Toshiya Yamashita, Mishima, JP;
Akira Murakami, Gotenba, JP;
Makoto Funahashi, Gotenba, JP;
Shinichi Ito, Susono, JP;
Toshihiro Aoyama, Susono, JP;
Michio Yoshida, Susono, JP;
Ryuji Ibaraki, Susono, JP;
Takashi Kuwabara, Susono, JP;
Toshiya Yamashita, Mishima, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A hydraulic control unit (), for a power transmission system having an oil receiving device (), which controls a power transmitting condition of the power transmission system, and an oil reserving device for feeding the oil to the oil receiving device, wherein the oil reserving device comprises a piston () in which a diametrically large portion and a diametrically small portion are arranged integrally and coaxially, a first hydraulic chamber () in which the diametrically large portion, and a second hydraulic chamber () in which the diametrically small portion are housed liquid-tightly and movably back and forth; and an oil feeding amount control device for feeding the oil of the first hydraulic chamber to the oil receiving device, by raising the oil pressure in the second hydraulic chamber () to operate the piston ().