Two-cycle peristaltic pump
CA 2026518 C · Owner: Carefusion 303, Inc. · Inventors: Meijer, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for pumping fluid through a resilient tube has a platen for holding the tube and a pumping mechanism for squeezing the tube against the platen. The pumping mechanism includes a first pumping finger which squeezes the tube at a first location and a second pumping finger which squeezes the tube at a second location. For their respective alternating pumping actions, the first finger is configured and operated to displace approximately twice the fluid volume displaced by the second pumping finger. A valve means is also mounted on the base and is positioned to alternately occlude the tube upstream from the first and second pumping fingers during the pumping action of the first pumping …
Read the whole patent
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
- Filed September 28, 1990 and granted June 10, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2012.
- 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.