Feed shell positioning mechanism
CA 2248563 C · Owner: Bigoney, Paul R. · Inventors: Bigoney, Paul R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved feed shell positioning mechanism (100) for a rock drilling machine having a boom (104), a feed shell support (106) pivotably mounted with respect to the boom (104) and supporting a feed shell (102) having a feed shell axis (108) a roll actuator (114) interposed between the boom (104) and the feed shell support (106) and a rock drill (118) having a rock drill axis (120). The rock drill axis (120) and the feed shell axis (108) are parallel and define a reference plane (122). The improvement resides in a swivel assembly (124) for attaching the feed shell support (106) to the roll actuator (114) allowing the feed shell support (106) to swivel between a forward drilling orientation …
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 September 30, 1998 and granted July 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2020.
- 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.