Title:
【発明の名称】蠕動ポンプ
Document Type and Number:
Japanese Patent JP2001523995
Kind Code:
A
Abstract:
A peristaltic pump for propelling liquid through a flexible tube segment. The pump has a cam shaft which carries a plurality of cams each having a driving surface. The driving surfaces of adjacent cams are spaced at an angle to each other about the cam shaft. The pump also has a plurality of cam followers which are each reciprocal in a common direction perpendicular to the axis of the cam shaft. Each cam follower has a cam surface riding on the driving surface of a cam and a tube engaging surface for engaging the flexible tube segment. At least one of the cam followers is a restriction cam follower of which the tube engaging surface engages the flexible tube segment for a longer period than that of the other cam followers. The pump also has a motor for rotating the cam shaft whereby the cams cause the cam followers to each engage and occlude the flexible tube segment to form a propagating depression wave in the flexible tube segment for propelling liquid. The restriction cam followers prevent back flow of the liquid.
Inventors:
Barak, Sui
Application Number:
JP54480298A
Publication Date:
November 27, 2001
Filing Date:
February 24, 1998
Export Citation:
Assignee:
Societe de Prodey Netsuru Society anonym
International Classes:
A61M5/142; F04B43/08; F04B43/12; F04B49/10; (IPC1-7): A61M5/142; F04B43/12
Attorney, Agent or Firm:
Akira Asamura (3 outside)