Alternating current variable speed motor-driven compressor system
CA 1097403 A · Owner: Doucet, Gary G. · Inventors: Doucet, Gary G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An alternating current motor-driven compressor for use in a refrigeration, air conditioning and/or heating system wherein the speed of the compressor is varied as a function of the frequency of the a.c. applied thereto the, a.c. power being generated in main alternator having an independent d.c. field supply providing limited increased field current during starting and predetermined field current during normal operation such that the output power from the alternator may be selected to accommodate the electrical demands thereon.
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 March 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 1998.
- 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.