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:
Jun. 12, 1990
Filed:
Jul. 25, 1988
Applicant:
Inventor:
Bruno Gorres, Aichwald, DE;
Assignee:
Daimler-Benz AG, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
73129 ; 116206 ; 188-111 ; 200 6104 ; 340453 ;
Abstract
A warning device for detecting mineral oil impurities in the brake fluid of hydraulic vehicle brake systems is described. The warning device comprises a body which is arranged in the brake fluid and can swell as a result of mineral oil and the change of shape of which indicates the presence of mineral oil impurities. The indication is given particularly as a result of the fact that the change in shape brought about by the swelling causes the opening or closing of an electrical circuit and thereby actuates a visual or acoustic indicator in the dashboard of the vehicle.