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Drd Diluter Corporation

Apec, Inc.

John D Czaban

Humayun Qureshi

Stanley M Liffmann

A measured amount of a first fluid is metered into a measured amount of a second fluid by a method where a fluid is confined within a first chamber and a plunger of predetermined volume is mechanically moved into the chamber to displace a first measured amount of fluid after which a second plunger is mechanically moved into a defined volume of the chamber to displace a second volume of fluid therefrom different from the first volume whereupon the first and second volumes can be mixed in predetermined proportions.

Method of metering a fluid using a multi-mode differential fluid

A method and apparatus for analyzing a sample to determine an analyte content has a sensor for sensing the analyte positioned between a first and second transducer. The analyte or derivatives thereof are reciprocated between the first and second transducer to reciprocate at the sensor and allow instantaneous sensing of an indication of the analyte's presence at a point between the first and second transducer. Rapid analysis can be carried out in many different systems including for example where the transducers are enzyme reactors and the analytes are body metabolites.

Analysis by sensor placement in recprocating flow

A multi-mode, differential fluid displacement pump provides for at least two different measured doses. The pump has a chamber in which are mounted a first diameter piston and a second diameter piston defining first and second volumes for reciprocation in the chamber. Means are provided for reciprocating the pistons as desired to obtain predetermined volume changes corresponding to movement of either or both of the first and second pistons. A system of operation and a mixing chamber useful in connection with dosages from the pump are interconnected with the pump.

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Beverly, MA, United States of America

John D Czaban