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:
Oct. 02, 2001
Filed:
Mar. 24, 1999
Michiharu Nishii, Toyota, JP;
Masaki Oishi, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A brake fluid pressure generating device includes a master cylinder piston slidably disposed in a cylinder body, a pressure chamber and a power chamber formed in the cylinder body, a master cylinder that generates a master cylinder fluid pressure in response to operation of a brake pedal, a supplemental fluid generator that generates a power fluid pressure, a fluid regulator that regulates the power fluid pressure to a regulator fluid pressure in response to operation of the brake pedal, a pressure increase valve that controls communication between the supplemental fluid generator and the power chamber, and a pressure release valve that controls communication between the power chamber and a reservoir tank. A valve operating force generating member controls the pressure increase valve and the pressure release valve, a first repulsion force generating member is controlled in response to the regulator fluid pressure and a second repulsion force generating member is controlled in response to the master cylinder fluid pressure. This invention generates a larger magnitude of regulator pressure under the condition that the master cylinder is in a disabled condition.