Swimming pool cleaner with vibratory power
CA 2175364 C · Owner: Frentzel, Herman E. · Inventors: Rief, Dieter J.; Frentzel, Herman E.; Sebor, Pavel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pool cleaner having an improved self-starting vibratory power source including a power-source chamber (24a) laterally defined by a pair of sealing walls (30f), a vibrator (30) which pivots in the chamber and has two wallfacing edges (30w) adjacent to the sealing walls and a pair of upstream flowfacing edges (30ue) positioned to be alternately reactive to fluid dynamic forces, and a seal (30d) along each wall-facing edge (30w) in sealing relationship with the sealing wall (30f) adjacent thereto and freely movable with respect to the sealing wall to accommodate passage of dirt and debris. Preferred embodiments include seals that have upstream arcuate surfaces (30us) which by virtue of wide …
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 October 24, 1994 and granted April 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2016.
- 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.