Roller screen gapping system
CA 2316625 C · Owner: Tirschler, Ehrenfried A. · Inventors: Tirschler, Ehrenfried A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a roller screen gapping system for a roller screen including a series of spaced parallel rolls mounted on pillow blocks at each end thereof the pillow blocks slidable along respective bed plates transversely of the roll axes to adjust the gap between adjacent rolls. The gapping system comprises spring biased bolts to clamp the pillow blocks on the bed plates unclamping cylinders carried by each pillow block and exerting an unclamping action on the bed plate to unclamp the pillow blocks for lateral sliding gapping cylinders carried by each pillow block adapted to contact an adjacent pillow block to adjust the gap between adjacent rolls and a common push …
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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 August 2, 2000 and granted April 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2022.
- 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.