Adjustable tuning spring system for vibratory conveyor drives
CA 2328282 A1 · Owner: Patterson, Harold E. · Inventors: Patterson, Harold E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spring coefficient adjustment system for a vibratory drive for use in driving a vibratory, delivery apparatus. The drive includes an electromagnet and an associated armature spaced apart, by a gap. In the drive a plate is movable with respect to a frame. One of the electromagnet and the, armature is connected to the frame and the respective other is connected to the spring plate. A, primary spring is connected between the frame and the spring plate. A plurality of auxiliary, elastomer shear springs are selectively engageable between the frame and the plate to change the, total spring coefficient between the frame and the plate.
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 December 14, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 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.