Working device for inner wall surface of tower tank, and inner wall surface working method using the same
CA 2473926 A1 · Owner: Fujiwara, Reiki · Inventors: Ito, Masaaki; Fujiwara, Reiki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A suspension beam (9) is vertically movably suspended from a suspension support base (8) installed inside a tower tank (1) and a working unit (20) is , vertically and/or horizontally movably attached to the suspension beam (9) through a guide mechanism (Z), it being arranged that working such as , welding, is applied to the inner wall surface (1d) of the tower tank (1) by the working unit (20). Thus, the setting of the working height position based on the working unit (20) can be easily changed by vertically moving the suspension beam (9), so that step change operation during working is greatly simplified or made unnecessary, and safety of operation and improved working efficiency …
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
- Filed May 8, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 8, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2025.
- 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.