Feed control device for plumbing tools
CA 2228868 C · Owner: Dunkin, Jon R. · Inventors: Rutkowski, Michael J.; Dunkin, Jon R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A feed control device particularly suited for mounting on a hand held power driven drain, cleaning apparatus having an elongate rotatable snake comprises a tubular housing having a transverse wall therein provided with a passage for the snake a pair of driving rolls mounted on the wall for rotation about axes skewed relative to the housing axis and a drive actuating roll mounted on the housing for radial displacement to engage the rotating snake against the driving rolls. The actuating drive roll provides the inner end of an actuating drive unit having an outer end engaged by a pivotal lever on the housing for displacing the actuating drive roll against the snake. The actuating drive unit …
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 9, 1998 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 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.