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:
May. 10, 1994
Filed:
Jul. 17, 1992
Applicant:
Inventors:
Erwin S Beckinghausen, Jr, East Amherst, NY (US);
Francis E Pritchard, Buffalo, NY (US);
Assignee:
Praxair Technology, Inc., Danbury, CT (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73 407 ; 73 46 ; 73 491 ;
Abstract
Apparatus and method for measuring a rate of leakage from a closed vessel enclosed in a container. Air is expelled from the container and a charge of helium-free gas is introduced. The preferred container is comprised of flexible sheets with mating edges sealed together. The flexible container is collapsed when air is expelled, and then limply charged with a known volume of helium-free gas. The vessel is pressurized with helium, the rate of accumulation of which is measured in the container gas to determine the leakage from the vessel.