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. 05, 1994
Filed:
Mar. 23, 1992
Applicant:
Inventor:
Friedrich Depfenhart, Heimsheim, DE;
Assignee:
Dr. Ing. h.c.F. Porsche AG, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340676 ; 340679 ; 340439 ;
Abstract
A process and apparatus monitors vehicle crawler chains for malfunctions during the driving operation. In particular, the process and apparatus monitors unacceptable changes of the pitch of the crawler chain which impairs the driving operation. The actual running sound of a crawler chain is sensed and is compared with the median running sound. When the actual running sound exceeds the median running sound by more than a given percentage and this excess occurs in the case of at least one chain link with a frequency that is higher than a given frequency, a warning signal is emitted to the driver.