Peristaltically operating roller pump and pump rotor therefor

US4564342A · kind A · utility

Assignee

• Fresenius AG · DE

Inventors

• Wolfram Weber · Friedrichsthal, DE
• Hans-Jürgen Neumann · Sankt Wendel, DE
• Artur Meisberger · Sankt Wendel, DE
• Bernd Mathieu · Spiesen, DE

Key dates

• Filing date: Jul 24, 1984
• Grant date: Jan 14, 1986
• Expiry date: Jul 24, 2004

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B43/1276
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A peristaltically operating roller pump, in particular a hose pump for medical technology, comprises a pump bed (25) whose bearing wall (28) in the exit region (31) has a curvature which is in the same sense as the circular path (33a) of a roller (33) mounted on a pump rotor (1) and which has a radius of curvature which is constant with respect to the circular path (33a) or gradually increases in the direction of rotation of the roller (33). The pump rotor (1) comprises a gear connection so that a constrained radial movement of a roller is converted to a corresponding follow-up movement of the other rollers or roller. By this combination of pump bed and pump rotor pressure peaks and fluctuations of the flow rate are effectively prevented.