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. 08, 2000
Filed:
Apr. 21, 1998
Applicant:
Inventors:
Iraj Gashgaee, Waltham, MA (US);
Graham Eacock, Westborough, MA (US);
George L Gonnella, Pepparell, MA (US);
Assignee:
Millipore Corporation, , US;
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
222333 ;
Abstract
An apparatus is provided for delivering precise volumes of a sample liquid. A piston is moved linearly into a first chamber containing an incompressible hydraulic liquid. The chamber includes one wall formed of a flexible diaphragm. The diaphragm separates the first chamber from a second chamber containing a sample liquid. The degree of expansion of the diaphragm and dispensing of the sample liquid from the second chamber are dependent upon the position of the piston within the first chamber.