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:
Feb. 20, 1979
Filed:
Sep. 02, 1977
Thomas J Godin, Ft. Lauderdale, FL (US);
Donald E Feuquay, Jr, Miami, FL (US);
Coulter Electronics, Inc., Hialeah, FL (US);
Abstract
A particle analyzing apparatus having an aperture retaining member positioned in a housing for obtaining signals from particles which pass through a scanning aperture. The aperture retaining member includes an elongate director tube into which the particles to be sensed are introduced for movement to and passage directly through the aperture. An aperture holder with the aperture provided therein is positioned at the terminus of the director tube but spaced a small distance therefrom to permit entry of ensheathing clean liquid within the space and passage of the ensheathing liquid through the aperture simultaneously with passage of the particles. The downstream side of the aperture is in liquid communication through a fluid circulating system with the upstream side thereof; a pump is interposed in the path of liquid communication between the upstream and downstream sides of the aperture to enable continuous recirculation of the liquid throughout the system.