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:
Sep. 16, 1997
Filed:
Jul. 10, 1996
Abstract
Toxicity measuring apparatus comprising a sample reservoir in which an aqueous sample to be tested is stored, a reagent reservoir, a diluent reservoir, a mixing chamber vented via a first valve to atmosphere through an air inlet tube which extends within the chamber towards a lower part thereof, second, third and fourth valves via which the sample, the reagent and the diluent respectively are fed selectively to the mixing chamber in accordance with the open/closed state of the said second, third or fourth valves, a toxicity detector cell fed with a mixture of the sample, the reagent and the diluent from the chamber, within which detector cell aqueous sample measurements are carried out, a linear pump and valve means, via which valve means the mixture is drawn through the detector cell from the chamber by the linear pump, or via which air in an upper part of the chamber is drawn from the chamber by the pump in accordance with the open/closed state of the said valve means, whereby for the purpose of mixing the sample, the reagent and the diluent, the said valve means is set so that air is drawn into the chamber via the inlet tube so as to bubble up through the mixture contained therein so as to effect mixing.