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:
Jul. 05, 1977
Filed:
Aug. 07, 1975
Anthony P Rolt, Stratford-on-Avon, EN;
Frederick J Walker, Banbury, EN;
Harry Ferguson Limited, , EN;
Abstract
A vehicle anti-skid braking system is described wherein the brake-applying effort of a driver on a hydraulic master cylinder is assisted or opposed by a reversible servo-booster in accordance with the instant condition of an anti-lock sensor and an associated switch-over valve means. The booster incorporates two shiftable diaphragm actuators only one of which operates to assist braking effort, but both of which operate to oppose braking effort thereby to reduce the possibility of a driver overriding anti-skid operation during 'panic' braking. A modified system provides only a single diaphragm actuator for opposing a driver's braking effort under skid conditions.