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:
Jul. 12, 2022
Filed:
Sep. 25, 2020
Applicant:
The United States of America, As Represented BY the Secretary of the Navy, Crane, IN (US);
Inventors:
Aaron Wiest, Norco, CA (US);
Craig Andrew Macdougall, Norco, CA (US);
Assignee:
The United States of America, as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
G01L 7/22 (2006.01); G01L 7/18 (2006.01); G01B 11/02 (2006.01); G01L 11/00 (2006.01);
U.S. Cl.
CPC ...
G01L 7/22 (2013.01); G01B 11/026 (2013.01); G01L 7/18 (2013.01); G01L 7/182 (2013.01); G01L 7/185 (2013.01); G01L 7/187 (2013.01); G01L 11/006 (2013.01);
Abstract
Systems and methods for pressure measurement are provided. A ludion with a trapped gas bubble floats between two liquids. Pressure acting upon the liquids causes the bubble to expand or contract, resulting in movement of the ludion which can be measured and correlated with pressure change. Pressure measuring device can measure pressures from 0.05 inHg to 110 inHg with a four-to-one Test Accuracy Ratio (TAR) without using mercury.