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. 08, 2013
Filed:
Dec. 22, 2009
Takayasu Sakashita, Tokyo, JP;
Jun Watanabe, Kofu, JP;
Takayasu Sakashita, Tokyo, JP;
Jun Watanabe, Kofu, JP;
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Abstract
An object of the present invention is to provide a disk brake having excellent responsiveness. A rotation preventing mechanismA prevents a rotation of a carrier(one output member) in a direction causing a pistonto return. An internal gear(the other output member) rotates by a predetermined degree to act on the rotation preventing mechanismA. When the motorcauses a sun gear (input member) to rotate such that the pistonmoves in a return direction, a rotation of the internal gearaccording to the rotation of the sun gearreleases rotation prevention of the rotation preventing mechanismA to the carrier. It is possible to release the parking brake without use of a worm gear which is used in the conventional arts for holding a thrust force (self-holding). As a result, it is possible to quickly release the parking brake, and therefore a driver can start to run without delay after parking brake release, whereby the responsiveness is improved.