Suction sweeping machine
CA 2232493 A1 · Owner: Riach, Alan Bryson · Inventors: Riach, Alan Bryson; Galashan, Francis Allan Nicol; Munnoch, Peter Alexander Clarence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pedestrian operable suction sweeping machine has a pair of rotatable brushes and a suction head at its front end, handlebars at the rear, an optional foldaway trailing seat, and a casing in which are located a motor and a fan to generate a suction air stream to draw debris from the suction head into a debris compartment at the rear of the machine. Filters are associated with the debris compartment to filter dust and heavier debris from the air stream before this is returned to the atmosphere. The machine has a brush raising mechanism to raise the brush when not in use which is operable from the handlebars, this mechanism preferably being rod and cable operated.
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 March 18, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2020.
- 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.