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:
Dec. 31, 1985
Filed:
Jul. 16, 1984
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
In a brake pressure control device having an inlet port for connection to a master cylinder and an outlet port for connection to a wheel brake cylinder, a differential piston cooperates with a first annular valve seat arranged in a first passage between the inlet and outlet ports, and an inertia-controlled valve element contained within a valve chamber formed in a second passage between the inlet and outlet ports to cooperate with a second annular valve seat fixed to one end portion of the piston. The one end portion of the piston is formed therein with a passage arranged to permit fluid flow passing through the second valve seat between the valve chamber and the outlet port. In such an arrangement, the valve element rests in place to be spaced from the second valve seat when the deceleration is below a predetermined value, the valve element being engaged with the second valve seat when subjected to the deceleration in excess of the predetermined value, and the piston is displaced against a spring load acting thereto to increase the space between the second valve seat and the valve element before the deceleration reaches the predetermined value under a heavy loaded condition of the vehicle.