Antistatic vacuum cleaner and method
CA 1286459 C · Owner: Warlop, Stephen M. · Inventors: Warlop, Stephen M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner for use in industrial applications to clean debris from areas and/or equipment wherein electrostatic discharge from the vacuum cleaner to the area or equipment would be highly undesirable includes a vacuum cleaner mechanism having a vacuum inlet. A long flexible plastic vacuum hose has one end connected to a vacuum intake. The other end of the vacuum hose is attached to a pickup nozzle. An air valve and control are provided in the pickup nozzle. In accordance with the present invention, a long, continuous, electrically "floating" helical conductor is embedded in the flexible plastic vacuum hose, extending from one end to the other. The helical conductor is ungrounded and …
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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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- 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.