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:
Dec. 14, 2010
Filed:
Jan. 22, 2009
Yasuharu Ooishi, Tokyo, JP;
Yasuharu Ooishi, Tokyo, JP;
Yamatake Corporation, Tokyo, JP;
Abstract
A gas meter with a simple structure for detecting a range from a minute flow rate, such as a gas leak, to the large flow rate of the normal state of use of the gas, while protecting the flow rate sensor from dust and without producing the problem of pressure loss. First, second, and third flow paths for carrying partial flows of a gas to be measured, in accordance with the flow rate, are provided by partitioning, in parallel, the cross-sectional surface of a main flow path. A flow rate sensor for flow rate measurement is provided in the first flow path with a small flow path cross-sectional area, and a flow rate sensor for detecting a gas leak is provided in the second flow path with a small flow path cross-sectional area, where a flow baffling filter is provided on one end side or both ends of the first and second flow paths, and a contaminant (dust) removing filter is provided on one end side or both ends of the first flow path.