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. 13, 1982
Filed:
Jun. 28, 1976
Applicant:
Inventor:
Glyn P Farr, Warwickshire, GB;
Assignee:
Girling Limited, Birmingham, GB;
Primary Examiner:
Int. Cl.
CPC ...
B60T / ;
U.S. Cl.
CPC ...
60562 ;
Abstract
A tandem master cylinder is disclosed having primary and secondary pistons which are freely movable apart, the pistons defining one wall of respective pressure chambers connected to primary and secondary braking circuits. The ratio of the effective areas of the piston are selected to lie in the range 0.2 to 0.8 resulting in the availability of the full effective area of the primary piston upon failure of the secondary system, with substantially decreased pedal travel over that required in prior systems where the pistons are freely movable apart but are of equal effective area.