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:
Jan. 20, 1998
Filed:
Nov. 30, 1994
Akiko Iida, Osaka, JP;
Abstract
In accordance with a tire air-pressure reduction detecting apparatus of the present invention, if it is judged that the tires all have a normal air pressure, it is judged whether or not a count value (C) is not less than a steady-state count (L.sub.2), and then if the count value (C) is not less than the steady-state count (L.sub.2), a counter (CNT) is decremented. That is, the count value (C) is kept to the steady-state count (L.sub.2) at the lowest, from which incrementation is started. On the other hand, if it is judged that a tire air pressure is reduced, it is judged whether or not the count value(C) is less than an upper counting limit (L.sub.1), and then if the count value (C) is less than the upper counting limit (L.sub.1), the counter (CNT) is incremented. That is, the count value (C) is kept to the upper counting limit (L.sub.1) at the highest, from which decrementation is started. Then, if the count value (C) is not less than a warning threshold count (N.sub.1), a warning is issued, and if the count value (C) is less than a warning stopping threshold count (N.sub.2), the warning is stopped. Thus, the frequency of the issuance of erroneous warnings can be reduced.