Keyless drill chuck
CA 2134795 A1 · Owner: Marik, Gregory C. · Inventors: Roberson, Raymond H. Jr.; Marik, Gregory C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A keyless drill chuck apparatus includes a tubular body having a longitudinal bore that can include first and second bore sections. The first bore section is of a smaller diameter and is closer to the proximal end portion of the drill, that end portion is connected to a tool driver, motor or the like. The second bore section is larger diameter portion that is opened ended. A pair of bearing supports are positioned at the two bore sections. Each of the bearing holders carriers a plurality of conically-shaped bearing members. During use, a drill bit can be placed in either of the bore sections and into engagement with one of the selected sets of bearing. During use different diameter drill …
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 November 1, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2016.
- 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.