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. 20, 1980
Filed:
Aug. 24, 1978
Takaaki Ohta, Okazaki, JP;
Sadayoshi Ito, Toyota, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
A proportioning valve for a hydraulic brake system having a capability of preventing brake vibration. In this proportioning valve a piston, which is exposed at one end thereof to an air chamber and constantly biased with a spring in a separating direction away from the air chamber, opens and closes a cut valve disposed in a braking fluid circuit from the master cylinder to the rear wheel cylinder(s) for performing fluid pressure regulating operation. The piston is further designed such that the stroke thereof is larger than it ought to be for the proper object, with the purpose of operating as a piston for absorbing fluid pressure vibration in the rear wheel cylinder(s) while the braking fluid pressure is relatively low, and as an ordinary fluid pressure regulating piston after the braking fluid pressure exceeds a predetermined set value.