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:
Jul. 03, 2012
Filed:
Jun. 23, 2010
Norimasa Kuki, Komaki, JP;
Yoshikane Akiyama, Komaki, JP;
Mitiharu Hikosaka, Komaki, JP;
Kazuhiko Kato, Komaki, JP;
Kazumasa Sekido, Nagoya, JP;
Daisuke Ueda, Nagoya, JP;
Harumi Niwa, Tajimi, JP;
Hiroshi Itazu, Kani, JP;
Yuji Mizuno, Kani, JP;
Norimasa Kuki, Komaki, JP;
Yoshikane Akiyama, Komaki, JP;
Mitiharu Hikosaka, Komaki, JP;
Kazuhiko Kato, Komaki, JP;
Kazumasa Sekido, Nagoya, JP;
Daisuke Ueda, Nagoya, JP;
Harumi Niwa, Tajimi, JP;
Hiroshi Itazu, Kani, JP;
Yuji Mizuno, Kani, JP;
Tokai Rubber Industries, Ltd., Komaki-shi, JP;
Sekido Kiko Mfg. Co., Ltd., Nagoya-shi, JP;
Abstract
A method of manufacturing a cylindrical member having anti-slip projections formed on axial end faces, the method comprising the steps of: employing a roller die, which is provided with a circumferential die groove of annular form extending through a medial section in a generatrix direction of a die face defined by an integral tapered outside peripheral face, and with a plurality of sloping die grooves extending in a tapered slope direction of the die face situated to both large-diameter and small-diameter sides of the circumferential die groove; providing plastic working to the axial end face with the small-diameter side of the roller die facing towards an inner peripheral side of the cylindrical member and with the large-diameter side facing towards an outer peripheral side, by pushing the die face against the axial end face while rotating circumferentially; and forming simultaneously an annular water barrier projection and the anti-slip projections.