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:
Apr. 07, 2015
Filed:
Oct. 20, 2010
Rainer Feldmann, Rimpar, DE;
Wolfgang Ettig, Külsheim, DE;
Rainer Feldmann, Rimpar, DE;
Wolfgang Ettig, Külsheim, DE;
Brand GmbH + Co KG, Wertheim, DE;
Abstract
A method for leak testing of hand-held piston stroke pipettes and a corresponding leak testing apparatus () for performing the method. Essential to the system is a holder () for the sealed connection of a pipette tip () to the leak-testing apparatus. A line system () with connecting sections of the leak-testing apparatus forms a specific connection volume. The pipette tip () is evacuated to a measuring pressure below atmospheric pressure. With the vacuum pump () disconnected and the connection volume sealed off, the pressure is measured after a specific time interval, and any possible rise in pressure is determined. An indication of the serviceability of the pipette () is generated from the pressure rise determined.