Apparatus for forming corrugated fins for heat exchangers
CA 1268023 C · Owner: Hamanaka, Ryomyo · Inventors: Takaba, Tatsunori; Hamanaka, Ryomyo; Onoue, Mutsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
SPECIFICATION, Title of the Invention: APPARATUS FOR FORMING CORRUGATED FINS FOR HEAT EXCHANGERS, Abstract of the Disclosure: An apparatus for forming a corrugated fin for a heat exchanger, which comprises a pair of confronted gear rolls for roughly forming a strip metal plate into a wavy shape and a pair of screw shafts rotatably disposed in parallel with a feeding passage of the roughly formed strip metal plate and on opposite sides of the feeding passage the, respective screw shafts being provided with helical blades on the outer peripheries thereof, the blades serving to compressively form the strip metal plate into a wavy shape having a predetermined fin pitch, by being brought into …
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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 April 24, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 2007.
- 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.