Concrete pile
CA 1084281 A · Owner: Nippon Concrete Industries Co. Ltd. · Inventors: Watanabe, Shigeru; Fukushima, Yoshikiyo
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 concrete pile having a steel plate, of a semi-cylindrical shape, integrally fixed at the outer periphery thereof. The steel plate has a number of connectors protruding beyond the inner surface so as to thrust into concrete. The connectors are formed by performing the incomplete blanking of the steel plate. When the concrete pile is subjected to a concentrated load or a large bending moment it can be reinforced by, means of the steel plate. The operation of attaching a waling to the concrete pile can be also easily performed through means of the steel plate.
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
- Granted August 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 1997.
- 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.