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:
Nov. 19, 2002
Filed:
Nov. 27, 2000
Applicant:
Inventor:
Dennis Langervik, Greensboro, NC (US);
Assignee:
Volvo Trucks North America, Inc., Greensboro, NC (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/130 ; G06F 1/740 ;
U.S. Cl.
CPC ...
G06F 1/130 ; G06F 1/740 ;
Abstract
An oil maintenance indicator for recording one or more parameters indicative of when an engine oil filter has been changed. The maintenance indicator includes a sensor that measures oil pressure of an engine at start up. A comparator compares an output provided by the sensor to known parameters to determine whether the oil filter has been changed. A recorder coupled to the comparator records one or several parameters indicative of when the oil filter has been changed.