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:
Sep. 09, 2008
Filed:
Sep. 02, 2004
Paul S. Zerwekh, Shawsville, VA (US);
Clark D. Boyd, Radford, VA (US);
Brooks Childers, Christiansburg, VA (US);
Daniel C. Blevins, Christiansburg, VA (US);
Paul S. Zerwekh, Shawsville, VA (US);
Clark D. Boyd, Radford, VA (US);
Brooks Childers, Christiansburg, VA (US);
Daniel C. Blevins, Christiansburg, VA (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
An optical sensor () that provides for concurrent pressure and temperature measurements at substantially the same location includes at least one launch fiber () and at least one temperature sensitive material () having a refractive index that changes with a change in temperature. The launch fiber and temperature sensitive material are spaced from each other across a gap () having length (L). A reflecting fiber () can be provided adjacent the temperature sensitive material. The optical sensor () also includes a sealed cavity (). The launch fiber () and reflecting fiber () can be attached to the tube and at least partially disposed within the cavity. Changes in pressure change the length (L) of the gap ().