Upright type vacuum cleaner capable of switching between suction path corresponding to place to be cleaned
CA 2237965 C · Owner: Kajihara, Shinichiro · Inventors: Kajihara, Shinichiro; Kito, Kazuo; Nishinaka, Noboru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dust collecting direction switching portion is provided at a wall at the back of the main body of an upright type vacuum cleaner. The dust collecting switching portion having a switch valve is branched into three directions. The branch in the first direction forms a rib for allowing a coupling hose to be fitted to a suction opening directed toward a floor surface the branch in the, second direction forms a rib communicating with a dust collecting portion inside the vacuum cleaner and the, branch in the third direction forms a rib allowing a hose to collect dust at a relatively narrow space between pieces of furniture. In operation, in response to an operation of a knob related to the …
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 May 19, 1998 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 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.