Water-powered sump pump
CA 2479673 C · Owner: Ostrowski, Michael H. · Inventors: Ostrowski, Michael H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water powered sump pump (20) that utilizes a relatively higher pressure water ported through a self reversing valve to a reversible stroke power cylinder having a movable member mechanically coupled to a pumping chamber for movement of a movable pumping member in the pumping chamber movement of the , movable pumping member forcing sump water to a discharge. The self powered sump powered sump pump (20) comprises a drive chamber (21) a power cylinder , (22), a pump chamber (24) a pump cylinder (25) and a self reversing valve (65). The volumes of the power cylinder and pumping chamber are different such that relatively high pressure, low volume flow to the power cylinder results in …
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 19, 2002 and granted December 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 19, 2024.
- 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.