Drive and support for machine tools
CA 2255565 C · Owner: Pflager, William W. · Inventors: Metzler, Joel K.; Pflager, William W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved drive and support for a machine tool by which a part thereof can be supported and driven along a linear path for machining. The drive and support includes a linear slideway (160) having a magnetic track (172) along which a housing will move when a moving magnetic field is generated in an electromagnetic assembly (170/174) mounted in the housing (150). The direction the housing moves depends upon the direction of movement of the generated magnetic field, and first hydrostatic bearing pads (200) acting between the housing (150) and the slideway (160), or between the electromagnetic assembly (170/174) and the track (170) or any combination thereof to counteract the , …
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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 20, 1997 and granted August 5, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2019.
- 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.