Lifting frame
CA 2354112 A1 · Owner: Shaw, Dean W. · Inventors: Shaw, Dean W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pivoting rigid frame (constructed of two legs and a cross member) is used to transfer material from one platform to another. The frame, legs being pinned to the base allow the frame to rotate or pivot about the pins. The resulting motion allows the pivoting frame to move or transfer material from one location to another. (The maximum distance being twice the length of the frame leg). Rotation of this frame can be accomplished through a variety of methods. One such method involves the utilization of two hydraulic cylinders. The rod end of each cylinder is connected to the frame leg pins. The head of each hydraulic cylinder is connected to the frame and to the base through a double linkage …
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 July 10, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2023.
- 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.