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. 05, 1989
Filed:
Dec. 01, 1988
Christopher Nowacki, Long Grove, IL (US);
Alfred G Brisson, Kildeer, IL (US);
Northgate Research, Inc., Arlington Heights, IL (US);
Abstract
A venturi device is provided for sensing air flow. The device includes a body having first and second substantially cylindrical end portions interconnected by a wasp-waisted intermediate portion. The end portions are provided with bores which may be of different internal diameter. The intermediate portion is provided with axially aligned counterbores. These counterbores are connected by four bores of relatively small diameter. A radially inwardly extending wall in the through-bore comprises a flow restriction, and lateral bores are provided on opposite sides of the wall extending radially outwardly from the through-bore.