Refrigeration system for heat exchangers such as used in ice rinks and the like
CA 1092379 A · Owner: Foster, Arnold H.V. · Inventors: Foster, Arnold H.V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Liquid refrigerant is pumped through the heat exchanger in the rink field or the like on demand, and, back to the evaporator. Any vapor is pumped through the compressor to an externally situated air cooled condenser and back to the evaporator thus maintaining the liquid phase. When the external condenser is in an ambient temperature a, predetermined amount below the temperature of the heat exchanger, the compressor shuts off and the liquid refrigerant is circulated by a liquid pump directly through the condenser and back to the evaporator to cool down the liquid refrigerant thus saving considerably on running costs inasmuch as the compressor is not used.
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 December 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1997.
- 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.