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:
May. 31, 2011
Filed:
Feb. 23, 2007
Keisuke Nanri, Minami-Alps, JP;
Tomoji Sato, Minami-Alps, JP;
Junichi Nagasawa, Kamakura, JP;
Yoshimasa Matsui, Yokohama, JP;
Keisuke Nanri, Minami-Alps, JP;
Tomoji Sato, Minami-Alps, JP;
Junichi Nagasawa, Kamakura, JP;
Yoshimasa Matsui, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A disk brake has a flange portion formed on the outer periphery of a portion of a caliper body main body where an opening is formed. The opening is used for insertion of a cutting tool for machining of a cylinder bore. The outer diameter of the flange portion is larger than that of a general surface of the outer peripheral wall of the bore formed in the caliper body main body. A lid member is secured to the opening by friction stir welding. The flange portion ensures a sufficient welding margin. The overall weight of the disk brake is reduced by minimizing the wall thickness of the general surface of the outer peripheral wall of the bore.