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:
Jan. 21, 1992
Filed:
May. 21, 1990
Andreas Greter, Steinhausen, CH;
Hoffman-La Roche Inc., Nutley, NJ (US);
Abstract
A pipetting insert for a pipetting device for taking a liquid sample from a vacuum tube closed in air-tight manner by a stopper. In order to prevent the undesirable escape of fragments of a sample from the vacuum tube before the sample is taken, the pipetting insert is made of plastic, has an elongated body which has a conical part at one end, a hollow tip in the form of a wall for piercing by a pipetting needle at the other end, and a central tubular part therebetween. The central part of the body has a bore along its longitudinal axis for connecting the interior of the conical part to the interior of the hollow tip, and the outer wall of the central part of the body contains at least one connecting duct which extends between the conical part and the tip and the cross-section of which is considerably smaller than the cross-section of the bore in the central part of the body.