Pneumatic percussion drill with exhaust cooling and lubrication of chuck end
CA 1112114 A · Owner: Clemenson, James T. · Inventors: Vincent, Robert R.; Clemenson, James T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic percussion rock drill includes a muffler casing surrounding the drill cylinder part and sealingly engaged with the drill housing so that exhaust air from the percussion motor flows forward through ports in a forward housing member into a chamber containing the drill chuck the, chuck rotation gearing, and the drill stem shank. Exhaust air is used to cool and lubricate the chuck parts before exiting from the drill onto the feed mechanism located below the drill housing. -9-
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 November 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 1998.
- 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.