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:
Mar. 31, 2015
Filed:
Jun. 04, 2010
Shinji Suzuki, Kanagawa, JP;
Takahiro Tokunaga, Kanagawa, JP;
Shinji Suzuki, Kanagawa, JP;
Takahiro Tokunaga, Kanagawa, JP;
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Abstract
A disk brake and a method of making the disk brake capable of improving the efficiency of manufacturing a caliper. A bottom portion () of a bore () is formed by integrally welding an opening surrounding portion at the bottom portion side of a cylinder portion () and a bottom cover member () fitted to the opening surrounding portion by friction stir welding. The bottom cover member is formed into a disk shape, and provided with a protrusion () at one surface side facing the interior of the bore. An inflow hole (), for a supply of a fluid pressure into the bore, is formed within the range of the protrusion to establish communication between an interior surface () of the protrusion and an outer surface () of the bore.