Magnetic clutch method and apparatus for driving a vehicle air conditioner
CA 2339841 A1 · Owner: Foresman, John S. · Inventors: Link, Larry R.; Foresman, John S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drive for the compressor (14) of a vehicle air conditioner having a magnetic clutch (20) for mechanically driving the compressor shaft (16) within a predetermined range of torque; a rotatable input element (22) on the magnetic clutch (20) to be rotated by the vehicle motor at varying speeds with changes in the vehicle motor's speed; a first electromagnetic element (42) on the rotatable input element (22); a compressor shaft (16) on the output side of the magnetic clutch for supplying torque to drive the compressor; a second electromagnetic element (46) on the compressor shaft (16) with a magnetic field between the first and second electromagnetic elements to rotate the compressor …
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 August 4, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2021.
- 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.