Pump device with collapsible pump chamber and including dunnage means
CA 2201898 C · Owner: Lund, Susan Stapleton · Inventors: Stahley, Robert Edward; Lund, Susan Stapleton; Peterson, Robert James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A collapsible pump chamber (60) is provided which includes several functional elements of a pump device. For example the, collapsible pump chamber (60) may be a bellows which includes a functional element of an outlet valve (80) a functional element of a, biasing feature and a functional element of a spin chamber. Consequently functional elements of all of the downstream functions are incorporated into the bellows. This can significantly reduce costs; due to reduced tooling and assembly, for example. Dunnage means (51) is provided for occupying volume within the collapsible pump chamber (60) to improve pump priming. The dunnage means (51) may be free floating or associated with the inlet …
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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
- Filed September 29, 1995 and granted April 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2017.
- 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.