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:
Apr. 20, 1982
Filed:
Apr. 26, 1979
Hitoshi Kuboto, Fujisawa, JP;
Kazuaki Shimizu, Fujisawa, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A hydraulic pressure control valve assembly for a hydraulic brake system for a wheeled vehicle, comprises a proportioning valve having a plunger which is axially movable in a direction against a spring in response to application of a hydraulic pressure to a fluid inlet port to control the magnitude of hydraulic pressure in a fluid outlet port, and a deceleration sensing valve responsive to a deceleration of the vehicle the degree of which exceeds a predetermined value. The deceleration sensing valve has a piston which supports an end of the spring and is sealingly disposed in a chamber to define a sealed expandable chamber which is communicable with the fluid inlet port to enable the expandable chamber to contain a fluid the pressure of which is changeable in accordance with the degree of the deceleration of the vehicle. Biasing means is arranged in the valve assembly to bias the plunger to move axially in the other direction when the magnitude of hydraulic pressure in the sealed expandable chamber exceeds a predetermined value causing the piston to move toward the plunger beyond a predetermined distance against the spring.