Vacuum cleaner with extendable hose and brush disengagement
CA 2111159 A1 · Owner: Hemmann, Ronald S. · Inventors: Hemmann, Ronald S.; Sundaram, Kamala J.; Dubois, Craig
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hand-held vacuum cleaner includes a housing a, source of vacuum, a hose removably connected to an intake section of the housing, a rotatably driven brush located at the intake section, and a system to automatically stop the brush from being driven when the hose is disconnected from the intake section. The hose is located on an exterior of the housing and connects the intake section to the source of vacuum. The hose is flexible and expandable with a relatively compact, free-standing curved shape when connected between, the intake section and the source of vacuum but, can be expanded in general accordion-like fashion when the hose is removed from the intake section to expand to about four …
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 December 10, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2015.
- 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.