Single-impact pneumatic hammer
CA 2004648 A1 · Owner: Vasiliev, Gennady G. · Inventors: Bakhareva, Viktoria V.; Sudnishnikov, Vadim B.; Zelentsov, Andrei A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A characteristic feature of the present hammer is that the lower part of the hollow cylindrical case is provided with transfer passages made therein to enable additional communication of the working and idle stroke chambers at a moment the striker comes in contact with the anvil.
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 December 5, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2011.
- 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.