Vibratory screening apparatus
CA 2080222 A1 · Owner: Douglas, Patrick Joseph · Inventors: Douglas, Patrick Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a vibratory screening apparatus 10 comprising a frame having a pair of opposed screen frame sides 11, a multi-deck screen 12 mounted on the frame sides 11 and a, shaft-driven vibratory mechanism coupled with the screen 12 in order to impart vibration energy thereto so as to assist the screening operation, in which the vibratory mechanism comprises: a pair of stubshafts 14 associated one with each of the frame sides 11 and being spaced apart from each other a respective, counterweight 17 mounted on each stubshaft 14 in the space between the housings 15, 16 and which is rotatable with the stubshaft to apply vibration energy to the stubshaft and therefrom to the screen 12 …
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 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2014.
- 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.