Rebar insertion device
CA 2460497 C · Owner: Ground Control (Sudbury) Limited · Inventors: Fifield, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for inserting rebar bolts during mining ground or roof support operations is disclosed. The apparatus is removeably secured to the front head of an extendable stoper drill. The apparatus has a clutch assembly comprising a roller, slide plate and an opposing backing plate. The axis of the roller is free to move along the slide plate at an oblique angle away from the pinch arm in the direction of extension. Extension of the drill causes the roller to apply pressure on a rebar bolt held between the slide plate and the backing plate locking it in place until the drill is retracted. When the drill is retracted the roller moves away from the backing plate releasing the …
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 March 9, 2004 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2026.
- 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.