Method of forming an external helical ball screw
CA 1260210 A · Owner: 20Th Century Machine · Inventors: Miller, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of forming a ball screw member from an elongated work piece having an outer cylindrical surface as well as the ball screw member, formed by the method. A helical ball screw thread is machined on the outer cylindrical surface, the helical ball screw thread having a helical groove and a helical crest surface. An end journal or other end treatment is formed in the workpiece, the end journal or other end treatment being located during the forming operation relative to the helical crest surface. The outer cylindrical surface of the workpiece may be centerless ground prior to the machining of the helical ball screw thread. The helical crest surface may be ground after the machining of …
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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.