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:
Dec. 20, 2011
Filed:
Dec. 26, 2007
Kyosuke Togawa, Nishikamo-gun, JP;
Takasuke Shikida, Okazaki, JP;
Kazunari Adachi, Kariya, JP;
Takashi Sakumoto, Kariya, JP;
Kyosuke Togawa, Nishikamo-gun, JP;
Takasuke Shikida, Okazaki, JP;
Kazunari Adachi, Kariya, JP;
Takashi Sakumoto, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
In one embodiment of the present invention, a water pump () is configured such that rotation is transmitted in a non-contact condition from a drive-end rotation member () whereto rotation is transmitted from an engine to a driven-end rotation member () having a pump impeller (). The drive-end rotation member () includes a vacuum chamber () and a pair of permanent magnets () provided so as to be mutually opposed with different polarities. The driven-end rotation member () includes an induction ring () having an induction section () provided so as to form a prescribed interval between the pair of permanent magnets (). Furthermore, the pair of permanent magnets () is moved in a rotation axis direction with respect to the induction section () due to the vacuum introduced into the vacuum chamber (), and the overlap amount (L) of the pair of permanent magnets () and the induction section () in the rotation axis direction is changed.