Method and apparatus for producing elongated concrete member of trapezoid cross section
CA 1046739 A · Owner: Nihon Kogen Concrete Kabushiki Kaisha · Inventors: Minegishi, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus for producing an elongated concrete member of a trapezoid cross section for use as a cross tie i e, a pre-, stressed concrete member for fixing rails of railroads include in sequence, the step of attaching end plates to a mold having an open top surface and end plates removed beforehand, the attaching operation being carried out in the condition of the mold having an open top surface and end plates removed beforehand, the attaching operation being carried out in the condition of the mold being transported in the longitudinal direction of the apparatus but lengthwise of the mold to complete the assemble of the mold the mold being, of such a construction that an …
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 January 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 1996.
- 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.