Flow restriction

Details Flow restriction Flow restriction

2005-02-10

2009-02-10

Brinson, Patrick F (Department: 3754)

Pipes and tubular conduits

With flow regulators and/or baffles

C138S039000, C604S407000

Reexamination Certificate

active

07487800

ABSTRACT:
Flow restriction to be fitted in a fluid line, consisting of a conduit part that has been produced from plastic by injection moulding and has been provided with a baffle closing the flow cross-section, wherein one or more openings have been made with the aid of a laser treatment. Each of these openings has a diameter of between 1 and 50 μm. It has been found that, when a large number of openings are used, if one of the openings becomes blocked for whatever reason this has hardly any effect on the total flow cross-sectional surface area. It is consequently possible to determine the flow conditions in the restriction very accurately and very reproducibly and consequently to establish the flow characteristics accurately. Such a flow restriction can be used, for example, in applications for dosing medication.

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patent: 19704497 (1997-11-01), None
patent: 1150738 (2001-07-01), None
patent: WO 96/23534 (1996-08-01), None
patent: WO 97/24528 (1997-07-01), None

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