Reamer
CA 1113446 A · Owner: Smith International, Inc. · Inventors: Garrett, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
OF DISCLOSURE:, A roller reamer for boring holes in the earth is useful for both well drilling and in mining. The reamer rollers are replaceably mounted on the reamer body in a manner that facilitates easy replacement so that the body can be reused after its initial complement of rollers is worn out. To that end the rollers, are rotatably mounted on shafts whose ends are supported by blocks inserted in the reamer body. To prevent shaft rotation, one end of each shaft is welded pinned, or otherwise nonrotatably anchored to its mounting block. Each block makes an interference fit with the body socket in which it is disposed. The blocks are stepped for quick release; Access openings to 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
- Granted December 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 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.