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:
Aug. 13, 2002
Filed:
Oct. 18, 2000
Agathe Hodac, Rapperswil, CH;
Stefano Fornito, Gossau, CH;
Werner Hälg, Mannedorf, CH;
Nikolaus Ingenhoven, Zurich, CH;
Mario Benedetti, Pfäffikon, CH;
Tecan Trading AG, Männedorf, CH;
Abstract
A delivery apparatus has, in a housing ( ), a cannula ( ) whose rear end is connected to a diluter ( ) via a connecting tube ( ). A piezoelectric actuator ( ) increases in length under the action of a control signal and acts on a membrane ( ) pierced by the cannula tip ( ) and belonging to an interchangeable polypropylene pipette tip mounted on the delivery apparatus and adhering to the housing ( ) by means of a collar ( ) resting against said housing, and causing said membrane to sag, with the result that a drop of a sample liquid which was previously sucked in by means of the diluter ( ) and whose accurately adjustable volume is between 1 nl and 1 &mgr;l is ejected from an outlet orifice ( ). After a pipetting process the pipette tip is ejected by means of a slide ( ). If the level of the sample liquid in the pipette tip always remains below the cannula tip ( ), virtually no carry-over occurs.