Blood pump for pulsating operation

US5263978A · kind A · utility

Assignee

• Forschungsgesellschaft fur Biomedizinische Technik e.V. · DE

Inventors

• Ralf Kaufmann · Walldürn, DE
• Helmut Reul · St. Blasien, DE
• Guenter Rau · Aachen, DE
• Ralf Bitdinger · Saint-Martin-d'Hères, FR

Key dates

• Filing date: Sep 9, 1992
• Grant date: Nov 23, 1993
• Expiry date: Sep 9, 2012

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M60/148
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A blood pump housing (43) accommodates at least one piston (21a,21b) driven by a coupling point (19a,19b) on a triangular closed hypocycloidal path (Z.sub.a, Z.sub.b). The piston (21a,21b) is provided for periodically pressing and releasing a blood chamber (37a,37b). One of the corners of the triangular closed hypocycloidal path (Z.sub.a,Z.sub.b) is directed towards the piston (21a,21b), so that the piston movements substantially consist of three periods, i.e. an advance stroke period, a return stroke period and a stationary stroke period.