Method of forming a flow restrictor

Details Method of forming a flow restrictor Method of forming a flow restrictor

1976-08-13

1978-05-02

Schwadron, Martin P.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1376253, 138 40, 138 45, 138115, 156289, 156290, 251 6, B29C 1700, F16K 706

Patent

active

040873013

ABSTRACT:
A flow restrictor is made by flattening a tube of flexible material about a member of cross-sectional characteristics representative of a desired flow passage, and securing the tube there, e.g. by rf welding. The member is then removed leaving a determinate flow passage in which problems of creep do not arise. The restrictor may have parallel to the flow passage a portion of the tube which is not permanently secured together so as to leave a by-pass which can be open to give a comparatively unrestricted flow passage or can be temporarily completely closed by external compression. A single tube may have in line a plurality of such restrictors with by-passes, the flow passages of the various restrictors being of different flow characteristics. The flow characteristic required is obtained by closing off the by-pass associated with the selected flow passage.

REFERENCES:
patent: 3624800 (1971-11-01), Swick
patent: 3779507 (1973-12-01), Clarke
patent: 3802463 (1974-04-01), Dabney

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