Pneumatic pinch mechanism for a deformable tube

Details Pneumatic pinch mechanism for a deformable tube Pneumatic pinch mechanism for a deformable tube

2005-05-03

2005-05-03

Koczo, Michael (Department: 3746)

Pumps

Motor driven

Fluid motor

C417S387000, C417S478000

Reexamination Certificate

active

06887047

ABSTRACT:
A pinch mechanism, which can be used as part of a pump, includes a deformable tube (10) enclosed within a body (11) which has a first chamber (11a). The deformable tube (10) defines a flow passage. A second chamber (19) is coupled via passage (17) to the first chamber (11a). A piston (20) is located within the second chamber (19) and movable between first and second positions. Upon moving to the first position a pressure increase occurs in the first chamber (11a). Upon moving to the second position a negative pressure is created in the first chamber (11a). A vent means (25) is located at a point during movement of the piston (20) between the first and second positions which enables pressure equalisation within the second chamber (19) to occur.

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