Cooling device for a construction machine
CA 2233215 C · Owner: Shin Caterpillar Mitsubishi Ltd. · Inventors: Yamagishi, Yoshinori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cooling device for a construction machine characterised in that a radiator (12a) and an oil cooler (12b) are separately placed relative to an engine (11) of the construction machine and are cooled by a cooling fan (15) that the oil , cooler (12b) is disposed downstream of the radiator (12a) in an air flow that is generated when the cooling fan (15) is reversely rotated that the cooling , fan (15) is stopped and rotated forwardly or reversely by controlling a hydraulic motor (32) through an electromagnetic selector valve (34) in a fan driving circuit (31), that the selector valve (34) is automatically changed over by a controlling device (41) having temperature sensors (44 45, 46), …
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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
- Filed March 17, 1997 and granted September 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 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.