Blower and dust collecting machine
CA 1195460 A · Owner: Parenti, Joseph A. · Inventors: Parenti, Joseph A.; Charles, Malcolm J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure: Dust generated in coal mining is removed by means of a blower having an exhaust fan which draws air through its intake opening from the face of the coal. The blower is provided with a first stage of closely-arranged small-diametered cylindrical-shaped individual centrifuges between its intake opening and the exhaust fan in which the dust-laden air spins as air is drawn therethrough and concentrates the dust in an annular surrounding portion which is separately drawn from the centrifuges through a conduit also evacuated by the exhaust fan. This conduit contains a sharply-reversing bend which effectively separates and discharges the dust into a collection chamber, …
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 October 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2002.
- 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.