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:
Mar. 04, 2003
Filed:
Oct. 06, 2000
Shunsuke Maeda, Aichi, JP;
Yoshihiko Kohmura, Aichi, JP;
Takio Kojima, Aichi, JP;
Yasuhisa Kuzuya, Aichi, JP;
Masanori Suda, Aichi, JP;
Takafumi Oshima, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A flow measurement device is disclosed, in which an accumulation of pollution substance onto a detection element is prevented, and which can measure a reverse flow similarly to a normal flow. On both ends of an outer wall outer peripheral portion of a divided flow pipe having a &OHgr;-shape pipe passage, there are oppositely formed an inlet port and an outlet port , which open in faces orthogonal to a flow direction of a main flow M that is a detection object. Within the divided flow pipe , by a curved partition , plural branch flow passages mutually branching and joining in the divided flow pipe are formed. Inside both end portions of the outer wall , undulation portions are formed so as to clog an inlet and an outlet of the outer peripheral side branch flow passage and, by this, throttles are formed respectively in a flow passage between the inlet port and the inlet of the branch flow passage and a flow passage between the outlet port and the outlet of the branch flow passage . In a bottom portion of the outer wall of the divided flow pipe , a detection element is attached so as to be exposed to a flow in the outer peripheral side branch flow passage and, against its detection face, a down flow DW further divided from a divided flow D obliquely impinges.