Apparatus for and method of induction-hardening machine components
CA 2103030 C · Owner: Storm, John M. · Inventors: Storm, John M.; Chaplin, Michael R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An induction-hardening machine (20) for the contour hardening of cross-axis intersecting-axis and nonintersecting-axis gears (27) such as hypoid gears (27) includes a programmable logic control unit (21) a source of quench liquid (40) and a, high-frequency induction generator (22) which are operably connected to a high-frequency induction coil (26) which is disposed at an inclined angle above the horizontally disposed workpiece (27) (hypoid gear). Fluid connections (37) are made between the source of quench liquid (40) and the induction coil (26) for the rapid delivery of quench liquid. The support plateform (28) for the hypoid gear (27) is connected to a rotary drive motor (30) and with …
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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 May 11, 1992 and granted September 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2014.
- 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
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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.