Fluid operated undercutter
CA 1062241 A · Owner: John Macdonald And Company (Pneumatic Tools) Limited · Inventors: Allan, David T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An undercutter comprising a substantially tubular body portion adapted to be received within a parallel-sided hole, a rotary percussion head journalled in one end of said body and having one or more cutting tools adapted to cut outwardly from the axis of said body, means for rotating said head about the axis of said body and means for operating said percussion head.
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
- Granted September 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 11, 1996.
- 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.