Fluid-driven pump
CA 1329052 C · Owner: Zebuhr, William H. · Inventors: Zebuhr, William H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid-driven pump (10) includes a drive-inlet-valve assembly (54) that alternately directs the flow of cold pressurized water from a pressurized-water inlet (12) into alternate drive cavities (46a and b). Outlet valves (60a and b) control flow out of the drive cavities (46a and b). The resulting reciprocation of piston heads (36a and b) draws hot water in through a pump inlet (16) and out through a pump outlet (18). A valve operating mechanism driven by the piston heads' reciprocation causes both the drive outlet valves (60a and b) to close before the drive-inlet-valve assembly (54) changes its state to redirect flow of pressurized cold water from the cold-water inlet (12). The drive …
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
- Granted May 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2011.
- 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.