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. 08, 2011
Filed:
Nov. 11, 2006
Applicants:
Matthias Grimm, Hannover, DE;
Jens Ohlendorf, Hannover, DE;
Inventors:
Matthias Grimm, Hannover, DE;
Jens Ohlendorf, Hannover, DE;
Assignee:
WABCO GmbH, Hannover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60L 1/00 (2006.01); H01H 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pushbutton device for actuating an electropneumatic parking brake (EPH) of a vehicle, which is connected to an evaluating electronic unit via connecting cables. In order to detect switching processes and/or faults, the input resistance of the pushbutton device between the connecting points is evaluated, thus allowing the evaluating electronic unit to reliably detect both the switched position of the pushbutton device and potential fault conditions.