Seal assembly for a high speed machining system
CA 2018505 C · Owner: Kostrzewski, Richard Anthony · Inventors: Kostrzewski, Richard Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high speed machining system (10) including a machine tool (16) mounted on a hollow shaft (14) rotatable at high speeds and the tool (16) being operable at high feed rates. Liquid cutting coolant (22) flows to the tool (16) through the hollow shaft (14) to flush away debris from the tool (16) and for cooling the system (10). Drive means (18) including windings rotate the shaft (14), which is supported by bearings. The windings and bearings have the characteristic of long life in an environment free of liquid cutting coolant (22). The high speed machining system (l0) includes a seal assembly (30) to prevent the liquid (22) from entering the liquid-free environment of the bearings and 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 June 7, 1990 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2012.
- 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.