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. 12, 2005
Filed:
Jul. 30, 2002
Jun Watanabe, Tokyo-to, JP;
Takuya Usui, Yokohama, JP;
Hirotaka Oikawa, Yokohama, JP;
Kabushiki Kaisha Hitachi Seisakusho, Tokyo, JP;
Abstract
An electric braking apparatus is disclosed in which a rotational movement from a motor is converted into linear movement that moves a brake piston to generate braking force. The electric brake apparatus can perform full parking brake function without sacrificing its original braking function. In operation, immediately after generation of braking force caused by rotation of the rotor () supply of electricity to the motor is turned off. After supply of electricity is turned off, however, the rotor () is restricted from returning to its original position due to an engagement with an engaging claw () via a claw wheel (), thereby keeping the barking brake remain effective. When electricity is thereafter supplied to the motor, the rotor () generates rotational torque sufficiently strong to push down the engaging claw () for disengagement, thereby releasing the parking brake.