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. 04, 1983
Filed:
Jan. 26, 1981
Applicant:
Inventor:
Roger J Nelson, Cedar Falls, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7386158 ; 7386171 ;
Abstract
A bi-directional fluid flow transducer includes a hollow cylindrical housing which slidably receives a movable hollow cylindrical core which coaxially receives a fixed rod or valve member. A pair of springs are biased to urge the core to a neutral position. The core is displaced from its neutral position in the direction of fluid flow by an amount linearly proportional to the rate of fluid flow. An LVDT coil and circuit generate an output signal which represents the amount and direction of core displacement.