Tube pump and liquid ejection apparatus

Details Tube pump and liquid ejection apparatus Tube pump and liquid ejection apparatus

2005-04-20

2010-02-02

Kramer, Devon C (Department: 3746)

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

C417S477900, C417S477120

Reexamination Certificate

active

07654803

ABSTRACT:
A flexible tube has a first portion and a second portion located close to each other in the vicinity of an opening of an accommodating case. A pressing member moves from the first portion to the second portion along the tube while pressing a portion of the tube. An assistant member is provided in the vicinity of the opening of the case. The assistant member has an assistant surface. When the pressing member passes the vicinity of the opening of the case, the assistant member transfers the pressing member from the second portion to the first portion via the assistant surface. This structure ensures a silent operation of the tube pump.

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patent: 2004-137940 (2004-05-01), None

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