Method and apparatus for the advancing of a sliding form
CA 1182654 A · Owner: Walbrohl, Heinz-Theo · Inventors: Walbrohl, Heinz-Theo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for advancing a sliding form upon the lining of a gallery or tunnel which, comprises a formwork body extending in the longitudinal direction of the gallery or tunnel and substantially parallel to its working face, an end form which closes off the front side of the annular space contained between the working face of the gallery or tunnel or an outer shell arranged there and the formwork body and a supporting structure which bears at least the formwork body. The invention is characterized in that, at least in the region of the roof of the gallery or tunnel, the parts of the formwork body which are filled at the back with liquid concrete and the parts of the …
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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 February 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 2002.
- 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.