Travelling volume pump chamber surface arrangement

Details Travelling volume pump chamber surface arrangement Travelling volume pump chamber surface arrangement

2005-03-29

2005-03-29

Koczo, Michael (Department: 3746)

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

C417S477400

Reexamination Certificate

active

06872058

ABSTRACT:
A surface arrangement (30) adapted for use in a travelling volume pump. The pump (50) has a pumping chamber defined between first and second opposed pumping chamber surfaces (52, 54), which extend from an inlet to an outlet of the pump in a pumping direction (58). The surface arrangement (30) includes a plurality of flexible ridges (32) inclined in the pumping direction (58) and forming one or more of the first and second pumping chamber surfaces (52, 54). The ridges (32) span across the one or more pumping chamber surfaces (52, 54) in a direction generally transverse to the pumping direction (58) and have distal peaks (34) adapted to abut and substantially seal against the opposed second pumping chamber surface in the presence of a localised force displacing one of the first or second pumping chamber surfaces (52, 54) towards the other of the first or second pumping chamber surfaces (52, 54).

REFERENCES:
patent: 2278821 (1942-04-01), Bennet et al.
patent: 4102612 (1978-07-01), Ritter

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