Metal disintegrator tube cutter
CA 2041457 C · Owner: The Babcock & Wilcox Company · Inventors: St. Louis, Daniel M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spark disintegrator tube cutter comprises a housing having a shaft with armature rotatably mounted in the housing. A conductive base which is electrically connected to a post accessible from outside the housing carries a carbon brush against which the armature slides. The post is used to supply electricity to the shaft. A flexible shaft extension is connected to the shaft and carries a cutting electrode which extends radially outwardly from an end of the shaft. A spacer which is engaged around at least part of the shaft extension on an opposite side from the cutting electrode, and urges the cutting electrode against the inner circumferential surface of the tube to be cut. A pneumatic …
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 April 29, 1991 and granted February 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 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.