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:
Nov. 27, 2001
Filed:
Sep. 08, 1999
Applicant:
Inventors:
Imran T. Siddiqui, Westchester, PA (US);
Roberto del Valle, Coral Gables, FL (US);
Santos Vargas, Miami Lakes, FL (US);
Pedro P. Cabrera, Miami Lakes, FL (US);
Assignee:
Coulter International Corp., Miami, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01L 3/02 ; B01L 1/100 ; G05B 1/00 ; G05D 9/00 ; B67D 5/30 ;
U.S. Cl.
CPC ...
B01L 3/02 ; B01L 1/100 ; G05B 1/00 ; G05D 9/00 ; B67D 5/30 ;
Abstract
A method and apparatus for aspirating and dispensing precise volumes of liquid, e.g. whole blood, comprises an aspiration probe or needle having an internal volume precisely equal to a desired volume to be dispensed, and a computer-controlled shear valve for trapping aspirated liquid inside the probe for subsequent dispensing. A liquid sensor positioned downstream of the shear valve cooperates with a liquid level sensor on the probe tip to assure that the probe lumen is filled with the aspirated liquid.