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. 04, 2004
Filed:
Oct. 25, 2002
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A hydraulic brake device for applying a braking force to a wheel of a vehicle which can detect an air-containing in a hydraulic circuit. The hydraulic brake device includes a hydraulic pressure generating device for generating and outputting a hydraulic pressure in accordance with a brake operational amount, a wheel cylinder operated by the hydraulic pressure directly or indirectly supplied from the hydraulic pressure generating device for applying a braking force to a vehicle wheel, a brake operational amount detection device for detecting the brake operational amount, a pressure sensor for detecting an output hydraulic pressure outputted from the hydraulic pressure generating device, and a controller for detecting an air-containing in a hydraulic circuit by a response time relating to a rise of the output hydraulic pressure detected by the pressure sensor relative to a start of a rise of the brake operation amount detected by the brake operational amount detection device.