Threaded bush assembly for shaft mount
CA 2007286 C · Owner: Rayner, David Antony · Inventors: Rayner, David Antony; Chester, Rodney
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A threaded bush assembly for receiving and coupling a shaft to a rotatable hub, comprises a tubular sleeve member which is located within the said rotatable hub, and a tubular bush member adapted to be received in either end of the sleeve member and comprising a central bore in which the shaft is received. The bush member is moveable axially relative to the sleeve member by means of grub screws which effect a "jacking" action. The internal circumference of the sleeve member and the outer circumference of the bush member each comprise a continuous helical, thread which in section defines a pair of mutually opposed tapered surfaces . The two threads are screw threadedly engageable yet, define …
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
- Filed January 5, 1990 and granted July 28, 1992. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 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.