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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.:

US 4180795 B1

PDFFull Text
Date of Patent:
Dec. 25, 1979

Filed:

Dec. 12, 1977

Alarm device for informing reduction of pneumatic pressure of tire

Applicant:
Inventors:

Akira Matsuda, Higashi-Murayama, JP;

Makoto Tanaka, Kodaira, JP;

Junichi Murata, Kodaira, JP;

Shigeo Yasuda, Musashino, JP;

Hiroshi Nishino, Musashino, JP;

Assignees:

Bridgestone Tire Company, Limited, Tokyo, JP;

Mitaka Instrument Company Limited, Musashino, JP;

Attorney:

Sughrue, Rothwell, Mion, Zinn and Macpeak

Primary Examiner:

Alvin H Waring

Int. Cl.
CPC ...
B60C / ;
U.S. Cl.
CPC ...
340 58 ; 200 6125 ;
Abstract

An alarm device for informing reduction of pneumatic pressure of vehicle tires by sensing abnormal change of tire internal pressure of a vehicle when running by a pressure sensing switch, by converting the thus sensed abnormal change into an electric signal and by generating an alarm to an operator. This device comprises an oscillator having an oscillation coil fixed on a chassis side of the vehicle; a resonator consisting of a resonance coil and a capacitor fixed to a peripheral portion of the rotating wheel having tire adjacent the oscillation coil and for resonating with an electromagnetic wave radiated from the oscillation coil; a signal processing device containing a sensing means for sensing change in an oscillation condition generated in the oscillator due to a resonant condition of the resonator switched on and off in accordance with abnormal internal pressure of a tire and for processing a signal sensed by this sensing means; and an alarm for generating a warning by the output of this signal processing device.

Find Patent Forward Citations

Matsuda, Akira. (1979). Alarm device for informing reduction of pneumatic pressure of tire (U.S. Patent No. 4180795). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4180795

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