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. 13, 1999
Filed:
Aug. 21, 1996
Akihiko Sekiguchi, Saitama, JP;
Akebono Brake Industry Co., Ltd., Tokyo, JP;
Abstract
An antilock brake liquid-pressure control apparatus includes first and second liquid-pressure control mechanisms 3A and 3B, and a liquid-pressure returning mechanism 4. A variable volume chamber 14 of the liquid-pressure control mechanism 3 communicates with the wheel cylinders, and with a primary pressure chamber 2a of a master cylinder through a cut valve 10 which closes its flow path only when an antilock brake control is performed. A liquid-pressure control chamber 13 communicates with a liquid-pressure pump 7 through a hold valve 5, and with a reservoir 8 through a decay valve 6. An input liquid chamber 17 of the liquid-pressure returning mechanism 4 communicates with a discharge port of the liquid-pressure pump. An output liquid chamber 18 thereof communicates with the primary pressure chamber 2a. In a pressure reduction mode of an antilock brake control, the brake liquid is sucked from the liquid-pressure control chamber 13 by the liquid-pressure pump 7, and accumulatively pressurized in the input liquid chamber 17, and the brake liquid is returned from the output liquid chamber 18 to the primary pressure chamber 2a. In a pressure reapplication mode, the brake liquid is supplied from the input liquid chamber 17 to the liquid-pressure control chamber 13, to thereby reapply a pressure to the brake.