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. 17, 2015
Filed:
Jun. 07, 2013
Applicant:
Azbil Corporation, Tokyo, JP;
Inventors:
Takashi Nomiyama, Tokyo, JP;
Masaki Namikawa, Tokyo, JP;
Assignee:
Azbil Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 31/02 (2006.01); F16K 37/00 (2006.01); F16K 31/12 (2006.01); F16K 31/36 (2006.01);
U.S. Cl.
CPC ...
F16K 37/00 (2013.01); F16K 37/0066 (2013.01); F16K 37/0075 (2013.01);
Abstract
A positioner includes a shift magnitude calculating portion that calculates a shift magnitude from the equilibrium state of a pilot relay, from an input air pressure that is inputted into the pilot relay and an output air pressure that is outputted from the pilot relay. A control calculating portion determines a control signal from an actual opening signal, an opening setting value, and the shift magnitude from the equilibrium state of the pilot relay that is calculated by the shift magnitude calculating portion, and outputs it to the electropneumatic converter.