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. 26, 2000
Filed:
Oct. 30, 1998
John Dimeff, San Jose, CA (US);
Other;
Abstract
An air flow measurement device includes a connector conduit for the air flow having a transverse restrictor plate located therein with a plurality of uniform and uniformly spaced apertures extending therethrough. The restrictor plate is maintained in the connector conduit by a pair of sleeves each of which includes on its interior diameter a plurality of angularly spaced passages and on its outer diameter a circumferential groove communicating with the passages. A pair of valves are mounted through the wall of the connector conduit for communication with the circumferential grooves so that a differential pressure meter may be connected to the valves to measure the difference in pressure upstream and downstream of the restrictor plate to thereby determine the flow rate. The sleeves may be made in two identical pieces to form the passages and grooves, and additional smoothing screens may be positioned upstream and downstream of the restrictor plate by further identical sleeve pieces.