Electric toothbrush with rotary bristle supporting structure
CA 2071916 A1 · Owner: Hilfinger, Peter · Inventors: Hilfinger, Peter; Schweingruber, Otto; Herzog, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
05537, Abstract of the Disclosure, The invention is directed to a toothbrush caused to rotate by electrical means, having a rotary bristle supporting structure (38) in which the bristle supporting structure (38) is arranged at an angle with respect to a longitudinal center line (52) of a brush section (24). The bristle supporting structure (38) is driven by a bevel gear train (42), such that the drive shaft (34 75), of the bristle supporting structure (38) acts as an axial securing means for the bristle supporting structure (38). In addition the torque is introduced in the bristle supporting structure (38) in a manner such as to ensure safe meshing of the teeth of the bevel gear train (42) …
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 September 5, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2012.
- 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.