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:
Apr. 18, 2006
Filed:
Apr. 23, 2004
Sanjay V. Sherikar, Mission Viejo, CA (US);
Sanjay V. Sherikar, Mission Viejo, CA (US);
IMI Vision, Warwickshire, GB;
Abstract
Disclosed is a method for measuring leakage flow rate of a valve wherein fluid flows through the valve in a single-phase flow of a gas or steam. The underlying principle upon which the leakage flow rate may be determined is that the heat loss across a length of bare pipe located downstream of the valve causes a decrease in the temperature of the leakage flow. Also disclosed is a method for measuring the leakage flow rate when the fluid passing through the valve transitions from a liquid-phase flow into a two-phase flow of liquid and steam. In two-phase flow, the underlying principle upon which the leakage flow rate may be determined is that any leakage of the valve will cause an increase in the pressure on the downstream side of the valve because of frictional resistance to flow in the downstream piping which corresponds to an increase in temperature thereof.