Aspirator pump

US5934888A · kind A · utility

Assignee

• Heraeus Med GmbH · DE

Inventors

• Rudolf Marka · Darmstadt, DE
• Stefan Maier · Schwieberdingen, DE
• Matthias Peuker · Hanau, DE
• Hans-Joachim Kuhn · Therwil, CH
• Walter Scheller · Maintal, DE

Key dates

• Filing date: Apr 18, 1997
• Grant date: Aug 10, 1999
• Expiry date: Apr 18, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S417/903
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An aspirator pump, especially for medical purposes, has a receptacle with two chambers arranged alongside each other, which are connected with a suction tube, and on each of which an element is arranged which is movable approximately parallel to the other, each partially enclosing a hollow space for generating a vacuum. The two movable elements are connected to each other by means of a lever, whose two end parts are attached at the upper area of the respective movable elements, and whose middle part is movably attached in a bearing positioned between the chambers. In the upper area of each movable element a one way valve is installed which opens when the pressure in the hollow space is higher than the surrounding air pressure. An easy operation and cleaning, as well as a reliable aspiration is obtained with the aspirator pump, owing to the fact that at all times a chamber and a movable element enclose a common, variable hollow space, wherein the movable element bounds the upper area of the hollow space. The two hollow spaces are connected through a common manifold with a connection for the suction tube of a catheter, and an additional one way valve is arranged at the entrance of ea…