Method and apparatus for improving soft viscous ground
CA 1096646 A · Owner: Takahashi, Yuichiro · Inventors: Takahashi, Yuichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus for improving the strength of a soft viscous ground are disclosed. For improving the strength of an area of some extent hardenable liquid consisting essentially of cement milk is injected into each one of a plurality of preselected points for promoting dehydration and compaction of the ground. The liquid is hardened in a short time for forming a rigid tree-like structure. A measure or index for the local ground strength is obtained at first by using a measuring/injection device, and the injection pressure is set to be slightly larger than the measure or index so obtained. The liquid may then be permeated into the soft viscous ground at substantially the same …
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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
- Granted March 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 1998.
- 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
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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.