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. 02, 2010
Filed:
Jun. 10, 2004
Tadahiro Ohmi, Aoba-ku, Sendai-shi, Miyagi 9800813, JP;
Kazuhiko Sugiyama, Nirasaki, JP;
Shoichi Hino, Tokyo, JP;
Eiji Takahashi, Tokyo, JP;
Makoto Saegusa, Tokyo, JP;
Nobukazu Ikeda, Osaka, JP;
Kouji Nishino, Osaka, JP;
Ryousuke Dohi, Osaka, JP;
Toyomi Uenoyama, Osaka, JP;
Katsuyuki Sugita, Osaka, JP;
Tadahiro Ohmi, Aoba-ku, Sendai-shi, Miyagi 9800813, JP;
Kazuhiko Sugiyama, Nirasaki, JP;
Shoichi Hino, Tokyo, JP;
Eiji Takahashi, Tokyo, JP;
Makoto Saegusa, Tokyo, JP;
Nobukazu Ikeda, Osaka, JP;
Kouji Nishino, Osaka, JP;
Ryousuke Dohi, Osaka, JP;
Toyomi Uenoyama, Osaka, JP;
Katsuyuki Sugita, Osaka, JP;
Fujikin Incorporated, Osaka, JP;
Other;
Abstract
The invention provides an automatic zero point correction device that includes a pressure sensor, wherein output from the sensor is outputted and the sensor output is inputted to a time-varying zero point drift correction means of the sensor; a sensor output judgement means of the time-varying zero point drift correction means, wherein the sensor output judgement means operates to make a judgement determining whether the sensor output is larger than a set value; and operating condition judgement means of the time-varying zero point drift correction means, wherein the operating condition judgement means judges operating conditions of the sensor, wherein the time-varying zero point drift correction means operates to cancel time-varying zero point drift of the sensor when the sensor output judgement means determines sensor output is larger than the set value and the operating condition judgement means determines operating conditions of the sensor are within previously set operating conditions.