Railroad locomotive crane boom apparatus
CA 2043785 C · Owner: Westlake, James · Inventors: Westlake, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved locomotive crane boom has a first member a second member, and a third member each pivotally connected at various pivot points to one another and to a locomotive crane. A series of pistons and cylinders powered by a hydraulic pump and fluid source, may be selectively extracted or retracted thereby permitting the improved boom to be positioned at any point along the length of a typical gondola car to be unloaded. In operation the locomotive crane with the included improved boom does not need to be uncoupled from the gondola car for unloading since the improved boom may be articulated such that an unloading magnet or any other appended appliance may be positioned across the entire …
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 June 3, 1991 and granted August 2, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2013.
- 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.