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:
May. 26, 1998
Filed:
Sep. 10, 1996
Hiromichi Nozaki, Yokohama, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Nissan Altia Co., Ltd., Tokyo, JP;
Abstract
The invention inspects a shock absorber installed in a vehicle between a vehicle body and a road wheel by manually moving the vehicle body in a generally vertical direction of the vehicle until the vehicle body initiates vibration in the vertical direction, detecting vertical displacement of the vehicle body, detecting load imposed on road surface by the road wheel, giving, as a damping force, the load detected at moment when the detected displacement is zero, and calculating a first derivative, with respect to time, of the detected displacement at the moment to give the result as a piston speed of the shock absorber at the moment. The damping force against the piston speed is compared with a predetermined damping force against the piston speed to evaluate whether the shock absorber has been deteriorated or not.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile