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. 16, 2009
Filed:
Jun. 02, 2005
Hiroshi Morinaga, Tokyo, JP;
Yasumichi Wakao, Tokyo, JP;
Akira Kobayakawa, Tokyo, JP;
Kabushiki Kaisha Bridgestone, Tokyo, JP;
Abstract
The dynamic state amount of a tire when a load is applied to the tire while running can be estimated accurately and stably by installing tire deformation amount measuring meansA andB at axisymmetrical positions which are equally distant in the axial direction from the center in the axial direction of the tire on the cross-section in the radial direction of the tire on the inner side of the belt portion of a tire tread in the radial direction, such as at the inner surface of the tread, between an inner liner and a ply, between plies or between a ply and a belt to measure the waveforms of deformation of the tire, detecting the contact time which is the time difference between contact edges from the waveforms of deformation, calculating contact length indices kand kfrom the contact time and the wheel speed detected by a wheel speed sensor, calculating the average value k of the above indices kand k, and obtaining a load applied to the tire by using the calculated average value k of the indices of contact length and a mapM showing the relationship between the average value of the indices of contact length and load pre-stored in memory means