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. 09, 1981
Filed:
Feb. 22, 1980
A Noel Pearman, St. Paul, MN (US);
Other;
Abstract
A system for in situ testing of fluid meters is disclosed in which two 4-way valves utilized in combination with a by-pass line such that with the valves in a first position, all the supplied fluid flows through the meter and, in the alternate position, the entire flow of fluid is through the by-pass system completely isolating the meter. In addition, one port of each valve leads to a test connection which is in line with the meter when the valves are in the alternate or by-pass position. This effectively removes the meter from the line and allows test equipment to be connected across the meter for calibration, verification, or other tests to be performed. The valves are preferably designed to operate in unison and such that during position switching, flow is initiated in accordance with the position to which the valve is being switched before flow in accordance with the original position is terminated.