Heat pump hot water heater
CA 2177943 C · Owner: Gannaway, Edwin L. · Inventors: Gannaway, Edwin L.; Scire, Frank J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water heater using the heat pump principle includes a hermetic compressor mounted within a well defined within a water tank. The outlet fitting of the compressor is connected to a condensing tube within the tank that heats the water. The compressor includes a radially outwardly projecting flange that is supported on a support surface on the upper header of the water tank through a resilient pad. The pad includes ribs dimples, or other, projections to partially support the flange away from the surface of the pad and/or to support the pad off of the support surface on the header, to thereby vent the volume defined between the compressor and the well.
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 May 31, 1996 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2018.
- 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.