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:
Jan. 26, 2010
Filed:
Mar. 28, 2005
Hiromi Inagaki, Saitama, JP;
Masaaki Myoi, Saitama, JP;
Hiromi Inagaki, Saitama, JP;
Masaaki Myoi, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A parking brake system is provided in which a parking brake state for a wheel brake (A) is obtained by forward movement of a parking piston () slidably fitted into a casing () with the rear side of the parking piston () facing a parking control fluid pressure chamber (), and the forwardly moved state of the parking piston () is mechanically locked by spheres () pushed up as a result of forward movement of a lock piston () of a lock mechanism (). Moreover, a plurality of guide grooves (), into which parts of the spheres () are rollably fitted, are provided on the inner face of a large diameter hole (), the inner face of a restricting step (), and the inner face of a small diameter hole (), the guide grooves () having a concavely curved cross-sectional shape and extending in the axial direction of an insertion shaft (). This enables an automatic parking brake state to be obtained by a simple structure without consuming power.