Tube pump and liquid injection apparatus

Details Tube pump and liquid injection apparatus Tube pump and liquid injection apparatus

2007-07-10

2007-07-10

Stashick, Anhony D. (Department: 3746)

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

C417S477100, C417S477900, C417S476000

Reexamination Certificate

active

10817429

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 auxiliary member is provided in the vicinity of the opening of the case. The auxiliary member has an auxiliary surface. When the pressing member passes the vicinity of the opening of the case, the auxiliary member transfers the pressing member from the second portion to the first portion via the auxiliary surface. This structure ensures a silent operation of the tube pump.

REFERENCES:
patent: 2102523 (1937-12-01), Ferrara et al.
patent: 2899905 (1959-08-01), Beecher
patent: 2988001 (1961-06-01), D Arcey et al.
patent: 5340290 (1994-08-01), Clemens
patent: 5897300 (1999-04-01), Luedtke
patent: 7-253082 (1995-10-01), None
patent: 2001-301195 (2001-10-01), None

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