Precision quenching apparatus and method with induction heating
CA 2228808 C · Owner: Ogawa, Yasuharu · Inventors: Tanaka, Yoshimasa; Itoh, Daiji; Tabuchi, Hisashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the apparatus: Y table 43 carries a work W and travels a predetermined distance in direction Y in a reciprocating manner; X table 41 causes the work W to reciprocate in direction X between a first position in, which the work W is loaded onto and unloaded from Y table 43, and a fourth position, in which an induction heating coil 23 is disposed; X table 41 is mounted on a base frame 11; a first reference on Y table 43 positions rows of quenched portions 76a of the work W in desired locations when the work W is loaded onto Y table 43; a second reference on Y table 43 serves as a reference for determining coordinates of Y table 43; a position measuring means 32 in a second position …
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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
- Filed February 3, 1998 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2020.
- 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.