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:
Mar. 04, 1986
Filed:
Jun. 14, 1985
Trevor O Jones, Shaker Heights, OH (US);
TRW Inc., Cleveland, OH (US);
Abstract
A tire inflation pressure detector which senses changes in tire pressure by detecting the changes in the spring rate of the tire which result from changes in tire pressure. An accelerometer (40) is mounted on a vehicle suspension component adjacent the tire. The accelerometer is sensitive to vertical accelerations experienced by the tire and provides a signal indicative thereof. A filter bank (64) processes the accelerometer signal so as to define the frequency distribution of the accelerometer output signal. A microcomputer (100) responds to the signals provided by the filters and locates the low frequency resonance peak whose position is influenced by the tire spring rate. The microcomputer determines whether tire pressure is low in accordance with the frequency of the resonance peak.