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:
Feb. 08, 1983
Filed:
Sep. 30, 1980
Hideyuki Kobayashi, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A split-type brake master cylinder for motor vehicles comprises a stepped bore, a stepped primary piston to constitute a first fluid chamber between a large diameter portion and a small diameter portion thereof, a secondary piston to form a primary pressure chamber in cooperation with the primary piston as well as a second fluid chamber in normal fluidic communication with a reservoir, and a compensation port continuously connected to the primary pressure chamber and in the fluidic connection to the second fluid chamber at the brake release condition while in the fluidic isolation therefrom at the brake application. Thus, the compensation port has no direct relationship with the pressure increase in the first fluid chamber thereby to assure the stable output pressure of the master cylinder regardless of the depression speed of brake pedal.