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. 07, 1994
Filed:
Mar. 19, 1993
Yutaka Ogawa, Tokyo, JP;
Kimihiro Ichinose, Tokyo, JP;
Oval Engineering Co., Ltd., Tokyo, JP;
Abstract
A flowmeter proving apparatus for obtaining a reliable flow meter factor in a short time, using a flow-meter having a non-uniform pulse output with a small volume power. The flowmeter to be proved is connected in series with a small volume prover, using a by-pass valve. A CPU calculates irregularities of meter pulse spacing, determines the repeatability for a proving run from the number of counted meter pulses and a function given by the meter pulse number and the meter pulse space irregularity. The CPU then computes the proving pass number N.sub.p necessary for obtaining the required repeatability by substituting the repeatability value into another predetermined function.