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:
Nov. 27, 2001
Filed:
Mar. 15, 1999
Shigeru Sakamoto, Nishikamo-gun, JP;
Yutaka Ohnuma, Toyota, JP;
Kenji Itoh, Toyota, JP;
Masakuni Suzuki, Toyota, JP;
Kouichi Sawada, Toyota, JP;
Hiroshi Isono, Susono, JP;
Noboru Noguchi, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
The pump is connected on its delivery side through an auxiliary passage to a primary passage connecting the master cylinder and brake cylinder to each other, and a pressure control valve is provided in a portion of the primary passage between the master cylinder and a point of connection thereof to the auxiliary passage. The pressure control valve releases working fluid from the pump to the master cylinder when delivery pressure of the pump is higher than the master cylinder pressure by more than a predetermined amount, and the pump is activated when the fluid pressure generated in the brake cylinder is required to be higher than the master cylinder pressure, during brake operation.