Method and apparatus for forming frogs in the sides of a concrete element
CA 1295457 C · Owner: Seppanen, Aimo · Inventors: Seppanen, Aimo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for forming frogs in the sides of a slip-formed concrete element especial-, ly a hollow-core slab. The frogs are formed in the sides of the element by removing cast material from the sides by a reciprocating scraping action. The reciprocating movement parallel to the side of the element is effected with a drive motor and a lever assembly. By means of the method, it is possible to obtain a desired frog shape and depth without damaging the side surfaces.
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 February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 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.