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:
Feb. 23, 1993
Filed:
Dec. 05, 1991
Pierre Lebret, Le Chesnay, FR;
Bendix Europe Services Techniques, Drancy, FR;
Abstract
The braking system comprises two hydaulic sub-circuits each connecting a driving wheel and a free wheel to a working chamber of a master cylinder (1) and includes a wheel braking anti-lock device comprising, for each of the wheels, a three-way solenoid valve (54, 53, 52, 51) normally opening communication between an inlet of fluid under pressure and the brake motor (34, 33, 32, 31) associated with the wheel, while, in the expansion phase of the anti-lock device, it closes this communication and connects the brake motor to a reservoir (21, 22) of fluid under low prressure for each sub-circuit, a switching slide (11, 12) isolating the brake motors from the working chamber of the master cylinder during the functioning of the pump (46, 45) is associated with the anti-lock device. It comprises, furthermore, a control slide (63, 61) which, at rest, determines a direct communication between the brake motor (33, 31) of the free wheel and the working chamber of the master cylinder (1) and which interrupts this communication when the pressure of the fluid in the brake motor (33, 31) of the free wheel is higher than a particular value.