Flow control device for example for the intravenous administration of liquids
CA 1092467 A · Owner: Koninklijke Emballage Industrie Van Leer B.V. · Inventors: Stegeman, Bernardus H.M.J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flow control device for controlling liquid flow rate has a supply chamber with an inlet channel a filter, chamber connected to the supply chamber by a passage and an outlet chamber connected to the filter chamber. A first membrane under tension in the supply chamber covers the passage between the supply chamber and the filter chamber with the inlet channel opening into the supply chamber on the same side of the membrane as the passage. A second membrane in the outlet chamber divides the chamber into two separate parts connected together by a by-pass channel and control, means are provided for adjusting the through flow area of the by-pass channel. An outlet channel is connected to the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.