Pipetting aid

US5510083A · kind A · utility

Assignee

• Deutsch & Neumann GmbH · DE

Inventors

• Helmut Sack · Berlin, DE
• Michael Breskamp · Berlin, DE
• Karl Ehinger · Karlsruhe, DE

Key dates

• Filing date: Nov 21, 1994
• Grant date: Apr 23, 1996
• Expiry date: Nov 21, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01L3/0213
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a pipetting aid for exerting suction on liquids. The usual previous "Peleusball" has disadvantages when handling and with regard to washing out. The object of the invention is to create a pipetting aid through constructive change, which is functionally safe and easy to handle and which at the same time allows uncomplicated cleaning of the inside. The new pipetting aid according to the invention consists of an elastic hollow body (1) with a larger ball-like central body (2), at which a first tubular attachment (3) and a second tubular attachment (4) is located, a third tubular attachment (5) leaving the said second tubular attachment (4) at an angle, and is characterized in that in the first tubular attachment (3) an easily removable check valve with particular constructive design is disposed as a first closure component (6), the valve, when the ball-like central body (2) is squeezed, allowing, without additional actuation, the compressed air from the inside of the hollow body into the outer atmosphere, but not vice versa, and at the same time the second and third closure component (7) and (8) in the corresponding attachment (4) and (5) adopting a position w…