Dragline bucket transporter and method of use
CA 2218844 C · Owner: Smith, Francis V. · Inventors: Smith, Francis V.; Spielman, Harold W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dragline bucket transporter for use in moving a dragline bucket with a hauling vehicle comprises a wheeled trailer having a U-shaped frame with tire-supported free ends the free ends forming-an open end. The frame is moved by a hauling vehicle to surround the sidewalls of a dragline bucket. Once the bucket is surrounded a cross member of the frame, engages and lifts a front end portion of the bucket by action of a hitching assembly attached to the hauling vehicle. With the front end of the bucket elevated, lifting assemblies located at the free ends of the frame lift up a rear portion of the bucket so that it is off the ground. The hauling vehicle can then transport the bucket to a …
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 October 22, 1997 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2019.
- 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.