Method of shaping a helical gear, and a pinion cutter used therein
CA 1204925 A · Owner: Mitsubishi Jukogyo Kabushiki Kaisha · Inventors: Izumo, Masatoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A structure and method of use of a gear shaper for making a helical gear from a gear blank and a method of, use thereof. The gear shaper includes a helical guide having a lead L, a cutter spindle movable along the helical guide, and a pinion cutter on the spindle. The pinion cutter has an angle of twist .PHI. and a normal module mn such that the quantity Z = (L.sin.PHI.)/(mn..pi.) is a non-integer a, number of teeth given by the integer closest to and less than Z, a pitch circle diameter equal to (L. tan.PHI.)/.pi. and a circular pitch which is larger than mn..pi. at one and only one location on its circular periphery and a circular mn..pi. at all other locations on its circular periphery. …
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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 May 27, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 2003.
- 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.