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:
Jan. 11, 1977
Filed:
Apr. 02, 1975
Kent M Negersmith, Carmel, NY (US);
Technicon Instruments Corporation, Tarrytown, NY (US);
Abstract
A liquid sample analyzer having a first fixed-volume chamber into which a first liquid is flowed filling it for subsequent displacement of the liquid volume therefrom by a second liquid into a substantially larger second fixed-volume chamber through a first port thereof, the second liquid acting as a pilot fluid. Prior to such liquid volume displacement from the first chamber, the second chamber, having an overflow outlet at a location remote with respect to the first port, is washed out and filled to an overflow level by a flow of the second liquid entering the second chamber through a second port. On such displacement of the volume of the first liquid into the second chamber, the last-mentioned volume and a relatively small volume of the second liquid entering the second chamber displace from the second chamber through the aforementioned outlet an equivalent volume of the second liquid, so that a reproducible volume of the first liquid remains in the second chamber with a reproducible volume of the second liquid. In this manner, the volumes of such liquids are precisely proportioned with substantial independence with respect to flow rates. One of the liquids may be a sample and the other may be a diluent. Sample analysis may take place in the second chamber prior to evacuation of the chamber contents therethrough the second port.