Device for milling or enlarging the inside diameter or the inside contour of an earthwork
CA 2292725 A1 · Owner: Angerlehner, Alfred · Inventors: Angerlehner, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a device for milling or enlarging the inside diameter or the inside, contour of an earthwork such as a conduit for example with a milling tool , which is held on an extension inn on a carrier which can be positioned in the cross section to be milled, with the, carrier having rolls for support and for traversing the cross section to be milled. Optimal, working conditions can be achieved in such a way that the extension inn is gimbal-mounted, on the carrier about a horizontal swiveling axis and about a further swiveling axis and the, point of articulation of the extension arm is height-adjustable.
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 December 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2021.
- 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.