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:
Dec. 16, 2014
Filed:
Nov. 30, 2010
Applicant:
Oivind Godager, Sandefjord, NO;
Inventor:
Oivind Godager, Sandefjord, NO;
Assignee:
Sensor Developments AS, Sandefjord, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/00 (2006.01); G01K 7/32 (2006.01); E21B 47/06 (2012.01); G01L 19/04 (2006.01); G01L 9/00 (2006.01);
U.S. Cl.
CPC ...
G01L 9/0022 (2013.01); G01K 7/32 (2013.01); E21B 47/06 (2013.01); G01L 19/04 (2013.01);
Abstract
A quartz transducer having four or more crystal-controlled oscillators intended for measurement of applied pressure and temperature. All four oscillators are controlled by crystal quartz resonators operating in the thickness-shear mode. Two crystals measure the pressure and temperature respectively. A third crystal is a reference, and the fourth crystal may be another reference crystal or a second temperature crystal. The output of the latter is either phase leading or phase lagging the thermal response of the main temperature sensor.