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. 13, 1982
Filed:
Nov. 20, 1979
Hugh G Margetts, Warwickshire, GB;
Lucas Industries Limited, Birmingham, GB;
Abstract
In a servo booster the movable wall is sealed to the rear housing wall by a rolling diaphragm supported on a sleeve which projects forwardly from the rear housing wall, and fluid communication between the rear housing chamber of the booster and a valve chamber in the valve body is provided by inter-communicating passages in the valve body and diaphragm support plate. The passage in the diaphragm support plate terminates in a port opening to the rear booster chamber. In one construction the sleeve is elliptical in transverse cross-section and a pair of tie rods extend right through the booster, through the bore of the sleeve, for relieving the booster housing of braking reaction forces. In another construction, instead of tie rods, the sleeve is extended to provide a tube, arms extend through slots in the tube to connect integrally the diaphragm support plate and the valve body, and one arm contains the passage.