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:
Nov. 05, 2002
Filed:
Jan. 05, 2001
Yoshihiko Kohmura, Aichi, JP;
Shunsuke Maeda, 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 rate and flow velocity measurement device. A part of a flow in a main flow pipe which is a detection object, is introduced into a passage of a divided flow pipe and becomes a flow The divided flow pipe has a curved portion or rather an inverted arc portion in which the flow is abruptly changed in direction or rather inverted by protuberances formed preferably in symmetry in upstream and downstream sides of the curved portion Outside the main flow pipe there is disposed on the bottom portion of the curved portion of the divided flow pipe a detection element fixed to a support body while protruding preferably 0.05-0.3 mm from flow passage faces in the vicinity thereof. An opposed face opposite to the detection element protrudes toward the detection face so as to throttle the passage and to accelerate a flow speed at the element. Thus, in the curved portion from the flow a down flow is constantly formed obliquely impinging against the detection face of the detection element improving flow measurement accuracy within a wide flow speed range.