Patent ID: 6024545
Filing Date: 2000-02-15
Classification: F04B

Abstract:
A tube-pump comprising; a ring-shaped elastic tube disposed along an inner wall surface of a cylindrical chamber formed within a casing, a ring-shaped pressure member disposed within the inner side of said elastic tube, and an eccentric cam device provided within said ring-shaped pressure member for moving said pressure member as said eccentric cam device rotates to press said elastic tube between said pressure member and said inner wall surface of said cylindrical chamber, wherein plural supporting means allowing a pressing action of said pressure member onto said elastic tube while preventing continuous rotation of said pressure member and supporting said pressure member within said cylindrical chamber are provided, the inner wall surface of said cylindrical chamber consists of a range of surface larger than a half circumference of said cylindrical chamber but less than a full circumference of said cylindrical chamber, and the inner wall surface of the cylindrical chamber, the pressure member, the eccentric cam and the elastic tube are arranged and configured such that at one rotational position of said eccentric cam said pressure member is moved toward said inner surface of the cylindrical chamber to simultaneously close said elastic tube at both ends.