Twin type slewing crane
CA 1084452 A · Owner: Aktiebolaget Hagglund & Soner · Inventors: Lundkvist, Salomon E. H.; Gremert, Gote O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A twin slewing crane mounted on a twin crane foundation. The twin crane comprises two individual cranes each having a luffing jib capable of being raised and lowered with hoisting ropes running to the jibs from winches. Each of the cranes is mounted on a supporting means rotatable around a common vertical axis and at the same distance from it. Each crane has a rotating mechanism meshing into a common fixed gear ring on the twin slewing crane in order to provide a rotating movement around the common vertical axis allowing the cranes to work singly or in pair. The crane is characterized in that the supporting means, through an axle device and at least two bearings of one of the cranes, is …
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 August 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 1997.
- 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.