Punch guide
CA 2042830 C · Owner: Deni, Frank · Inventors: Deni, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention involves a novei structure used in piercing a metal workpiece. Other workpieces made from materials other than metal may be used, if desired. The structure uses a punch plate having movably connected below it a stripper plate. A spring means connects these two plates so that they are movable toward each other. The stripper plate has an aperture centrally located therein and a tubular punch guide fitted over the aperture. A punch housing containing a punch is telescopically fitted within said tubular punch guide and will travel through the length of the punch guide, through the aperture and puncture a workpiece held below. The tubular punch guide prevents side to side movement …
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 May 17, 1991 and granted June 28, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2013.
- 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.