Method and apparatus for conducting operation in pipe
CA 1296617 C · Owner: Isaka, Katsuhide · Inventors: Nagayoshi, Akito; Ito, Masahiro; Isaka, Katsuhide
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an apparatus for conducting predetermined operations in the interior of a pipe by means of a tool, second drive means for displacing said tool in the radial direction of said pipe is provided with a plurality of cylinder mechanisms and said cylinder, mechanisms are interconnected so that said tool may be displaced in the radial direction of said tool by a value corresponding to a total amount of expansion and contraction of said cylinder mechanisms.
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 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.