Punch assembly
CA 2062893 C · Owner: Robinson, Verlon · Inventors: Robinson, Verlon; Wilson, Kenneth J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
16-, A punch assembly for use in a punch press including a pair of elongated rods having mating respective male and female threaded ends a head on, one end of the female portion for being engaged by a ram of the press, a compression spring a punch tip at, the end of the male portion for action with a workpiece, a punch guide encompassing part of the punch assembly to act as a stripper in relation between the punch tip and the workpiece and a wire clip co-acting between the male and female threaded portions for adjustment of the overall punch length. After sharpening the wire clip is disengaged and the, male and female rods are axially rotated in opposite directions to compensate for the …
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 March 12, 1992 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2014.
- 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.