Apparatus for screw-threading
CA 1107989 A · Owner: Wolosianski, Alexandre · Inventors: Wolosianski, Alexandre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In combination with a lathe holding and slowly revolving, about its longitudinal axis a work-piece to be, screw-threaded with a tapering portion and a cylindrical portion, a tool holder ring is eccentrically mounted about the work-piece and is rapidly rotated about the work-piece in the same direction as the work-piece but at a relatively higher speed; while rotating, the tool holder ring is caused to advance longitudinally along the revolving workpiece; a plurality of cutting elements radially secured, in the holder, have cutting edges that intermittently and successively contact tangentially the work-piece during each revolution so as to move from the work-piece a chip with each …
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 September 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 1998.
- 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.