Power boring bits and method of making same
CA 1062050 A · Owner: The Stanley Works · Inventors: Hildebrandt, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power boring bit is fabricated from a shaft member and a disc which has a channel extending from the circumference thereof to a coaxial aperture through which the shaft extends. The shaft has a pointed tip portion at one end which provides cutting surfaces extending from the point of the tip portion and circumsoribing a circle of rotation of maximum radtus. A generally axially extending planar shoulder portion is provided on the tip portion with the radial distance to the shoulder pertion being less thatn the maximum radius. One edge portion of the disc bonding the channel is bent to extend from the plane of the body of the disc towards the point and thereby define a cutting lip portion …
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 September 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 11, 1996.
- 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.