System for coupling machine tools
CA 2175379 C · Owner: Erickson, Robert A. · Inventors: Erickson, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coupling system (1) is provided for lockably coupling together machine tool components that comprises a male coupling (3) having a recess (19) at a distal end that includes follower surfaces (24) and female coupling (9) having an opening (31) disposed along its longitudinal axis for receiving the distal end of the male coupling (3) and a pair of opposing jaw members (12) pivotally mounted in the opening (31) and having cam surfaces (44) engageable with the follower surfaces (24) of the male coupling (3). The system (1) includes a drive train (13) for pivotally moving the jaw members (12) apart in order to inter-engage the cam (44) and follower surfaces (24) of the female (5) and male (3) …
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 November 16, 1994 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2016.
- 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.