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. 29, 2009
Filed:
Mar. 29, 2007
Shingo Uozumi, Nishio, JP;
Hiroshi Kato, Kariya, JP;
Yasunari Muranaka, Okazaki, JP;
Kazuhiko Sugita, Anjo, JP;
Naoki Ito, Nishio, JP;
Shingo Uozumi, Nishio, JP;
Hiroshi Kato, Kariya, JP;
Yasunari Muranaka, Okazaki, JP;
Kazuhiko Sugita, Anjo, JP;
Naoki Ito, Nishio, JP;
Aisin AW Co., Ltd, Tokyo, JP;
Abstract
In an automatic transmission, a lip portion of an oil seal can be prevented from riding up reliably when an impeller hub is inserted into the oil seal so as to be attached thereto, even when the lip portion is provided with a tightening margin. The impeller hub is attached to the oil seal from the lip portion side of the oil seal , with an end portion thereof in which a notch is formed. The impeller hub has a first chamfer portion formed in a bottom portion outer peripheral edge portion of the notch as an inclined surface that decreases radially in an axial direction of the impeller hub toward the end portion of the impeller hub, and an axial distance of the first chamfer portion from the bottom portion outer peripheral edge portion increases from both end sides of a circumferential direction of the notch toward a circumferential direction central portion of the notch.