Method and apparatus for removing old pile
CA 1298274 C · Owner: Hoaki, Kouji · Inventors: Hoaki, Kouji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bucket is set to surround an upper end portion of an old pile, and an intermediate portion of the pile is radially cut by jetting high pressure water from the bucket from the center and opposite sides of the outer periphery of the old pile. The pile portion above the cut portion is chucked with a chuck mechanism and in this state the chuck mechanism is turned to twistingly sever the pile portion above the cut portion with the stress thus produced, and the separated pile portion is removed. The above sequence of operations is repeatedly performed to remove the entire old pile.
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 March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
- 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.