Collapsible tower boom lift
CA 1291047 C · Owner: Macdonald, Wayne P. · Inventors: Destefan, John F.; Macdonald, Wayne P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A collapsible boom lift comprised of upper and lower telescoping boom assemblies. The upper boom is pivotally connected to an upright support member which is pivotally connected at its lower end to the lower boom The upright support member is maintained plumb during raising and lowering of the lower boom and the operator's platform, carried at the end of the upper boom, is maintained level during raising and lowering the upper boom. The upright support member is always positioned within the perimeter of the chassis of the boom lift.
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 October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2008.
- 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.