Temperature and pressure actuated capacity control system for air conditioning system
CA 1233215 A · Owner: Dunham-Bush, Inc. · Inventors: Shaw, David N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air conditioning control system for use with, an air conditioning system having a variable-capacity compressor, varies the compressor loading in accordance with evaporator pressure at return air temperatures above an upper set point and fixes the compressor loading at 33% or thereabouts when the return air temperature falls below the upper set point. If the temperature continues to fall, the compressor will be shut down at a lower set point at which the heating apparatus may be automatically and momentarily activated. The compressor will not again be activated until the temperature rises above the upper set point. The heating is deactivated as soon as the temperature rises above the …
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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 February 23, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2005.
- 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.