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:
Jun. 25, 2019
Filed:
Dec. 05, 2012
Applicant:
Preciflex SA, Biel/Bienne, CH;
Inventor:
Lucien Vouillamoz, Feusisberg, CH;
Assignee:
PRECIFLEX SA, Neuchâtel, CH;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16L 55/027 (2006.01); G04B 19/00 (2006.01); G04B 25/00 (2006.01);
U.S. Cl.
CPC ...
F16L 55/027 (2013.01); G04B 19/00 (2013.01); G04B 25/00 (2013.01);
Abstract
A capillary system for a fluid indicator includes a fluid restrictor, and a capillary tube. The fluid restrictor has a small aperture formed therethrough. The capillary tube is adapted to receive a fluid. The fluid restrictor is sealingly affixed into at least one end of the capillary tube so that the small aperture communicates between the inside of the capillary tube and the outside of the capillary tube. The capillary tube is optionally treated so that an inner surface is oilophobic and hydrophobic. The system better controls the interface or meniscusbetween the fluids contained in the capillary tube, preventing mixing.