Method and device for determining a previous state of stress for tunneling
CA 2369020 A1 · Owner: Tachus Gmbh · Inventors: Hagedorn, Thiemo
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 method for determining a previous state of stress in the area of a mountain range or soil. Said method comprises the following steps: applying a reference bit for a radial position excavating a tunnel , section, introducing a radially effective support in the area of the reference bit, determining the force acting upon said support and/or determining the dimensions of the support, and determining the previous state of stress using the detected force and/or dimensions of the support. The method for determining parts of a line that is characteristic of a mountain range comprises the following steps: introducing gradually variable radially , effective safety …
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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 March 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2022.
- 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.