Tool for cleaning overhanging surfaces, such as ceilings and arches
CA 1330851 C · Owner: Ducreux, Pierre · Inventors: Metteey, Michel; Gauthier, Rene; Ducreux, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cleaning tool for arches (7). The tool (10) comprises a tank (11) open towards the arch (7) and in contact therewith by sealing borders (15). The tank (11) is deformable (20,22,23) and bears elastically (62) against a mobile arm (2). The curvature of tank (11) is regulated (53) as a function of that of the arch (7). The used water is recovered (pipe 45). Application to underground railway cleaning in particular and to all types of tunnels in general.
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 July 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 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.