Cantilever counterweight fuelling machine bridge
CA 2021091 C · Owner: General Electric Canada Inc. · Inventors: Cashen, William Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bridge arrangement for supporting a, fuelling machine for a nuclear reactor has one main tower which supports the bridge as a cantilever. A counterweight tower, adjacent the main tower carries a, counterweight which is substantially equal in weight to the weight of the bridge plus fuelling machine. The bridge is mounted to the main tower, and the counterweight is mounted to the counterweight tower using rollers to provide for vertical movement with a minimum of friction. A vertical ball screw in both towers engages respective nuts on the bridge and the counterweight. Gears couple the two ball screws together so that when the bridge is raised the counterweight is lowered, and vice versa. …
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 July 12, 1990 and granted October 24, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2012.
- 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.