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:
Apr. 08, 2003
Filed:
Dec. 08, 2000
Applicant:
Inventors:
Virgil A. Marple, Maple Plain, MN (US);
Daryl L. Roberts, Blaine, MN (US);
Assignee:
MSP Corporation, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 1/24 ;
U.S. Cl.
CPC ...
G01N 1/24 ;
Abstract
A orifice plate used in an impactor that has a large number of very small openings therein is made of a thin material, and has a plurality of projections that extend outwardly from one surface thereof. The orifice plate is mounted adjacent a plate surface, and the projections serve to support the orifice plate spaced from the surface when the orifice plate deflects under differential pressures.