A reinforced concrete load-bearing pile with multi-branches and enlarged footings and means for forming the pile
CA 2003376 C · Owner: Yanqin, Xu · Inventors: Junsheng, Zhang; Yanqin, Xu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a reinforced concrete load-bearing pile with multi-branches and enlarged footings for reinforcing foundations, and means and method for forming such a pile. The load-bearing pile of the invention comprises a pile body at, least one branch and enlarged footing integrated with the pile body. The means for the pile comprises a pile cavity drilling/pressing device, a branch cavity pressing device and an enlarged footing cavity pressing device. The pile of the present invention possesses higher load-carrying capability increases the stability of the foundation and saves more than 50% construction materials. The formation means of the invention solves the problem of …
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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 November 20, 1989 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2011.
- 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.