Stacker-reclaimer
CA 1234068 A · Owner: Drg (Uk) Limited · Inventors: Evans, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stacker-reclaimer has a luffing and slewing mounting supporting a boom structure with a main forwardly extending boom having material-conveying means running along it, and a rearwardly extending tail boom with a counterbalance weight depending from its rear end. The tail boom is at a higher level than the main boom to, provide clearance for a feeder conveyor to the materialconveying means. The counterbalance weight is attached by a pivot on the tail boom, and is displaceable about the pivot by a control cable attached to a non-luffing part of the luffing and slewing mounting forwards of the luffing axis whereby the weight is displaced forwards in relation to the pivot in upward luffing …
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
- Granted March 15, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 15, 2005.
- 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.