Motor vehicle air conditioning control system
CA 2218409 C · Owner: Touchtunes Music Corporation · Inventors: Nathan, Guy
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 with a hermetic compressor for a motor vehicle is disclosed. The control system comprises a system for controlling the speed of the hermetic compressor (34) in such a way that the compressor driven by a variable-displacement pump assembly (30) coupled to a fixed-displacement hydraulic motor (33) rotates at a speed that is as close as possible to the rated compressor speed and a sensor device (8) enables measurement of the rotation speed of the shaft of the hydraulic motor (33) connected to the compressor (34) so that a comparator (1) can change the forward direction of the plate (31) of the variable-displacement pump (30) depending on the changes in the …
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 February 7, 1997 and granted April 1, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 2019.
- 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.