Hoist and scaffold bracket
CA 1136177 A · Owner: Riblet, Henry · Inventors: Riblet, Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plurality of scaffolds stacked one above the other on a support and each scaffold supported on two laterally spaced self-locking scaffold brackets attached to the supports by load-activated locks. A hoisting mechanism is selectively connected to the scaffolds in such a way as to lift each of the scaffolds up sequentially into its final position. Mechanical jacks connected to the load activated locks are used for final small adjustment of the positions of the scaffolds. The jacks are disabled without removing them during the time that the scaffolds are being moved up or down.
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 November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 1999.
- 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.