Method of and apparatus for measuring pile skin friction
CA 1255920 A · Owner: Toa Harbor Works Co. Ltd. · Inventors: Fukaya, Takeo; Kishida, Takao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Measurement of the skin friction of piles according to which a skin-friction measuring device having a cylindrical testing part which is rotatable relative to a main body of the device is introduced into a bored hole in a ground and is rotated by a driving rod and by rotating the driving rod, the friction force then generated between the cylindrical testing part and the wall of the bored hole is determined in terms of the torque required for rotating the cylindrical testing part.
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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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- 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.