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. 14, 1989
Filed:
Mar. 11, 1988
Applicant:
Inventor:
Kazumichi Tutumi, Hyogo, JP;
Assignee:
Mitisubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7386123 ; 731182 ;
Abstract
A suction air measuring device comprises vortex detection means for detecting a Karman vortex signal of vortex in a suction conduit of an engine as a digital signal and storing it in a storage means at a predetermined time period and digitizing means for digitizing an output of the vortex detection means to obtain a Karman vortex pulse signal, setting or resetting the Karman vortex pulse signal when an output of the vortex detection means increases from a lower extreme thereof resetting or setting the Karman vortex signal when the output of the vortex detection means decreases from an upper extreme thereof by a predetermined value.