Fastener head with stabilizing ring
CA 1294156 C · Owner: Illinois Tool Works Inc. · Inventors: Speer, David B.; Nilsen, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fastener head, preferably a capped fastener head including a sloping flange surrounding a central wrenching portion, having wrenching surfaces, such as axial hexagonal surfaces. A rib disposed on the sloping flange provides stability to a fastener head having such a rib by increasing the overturning moment required to buckle a column comprised of a fastener and driver. The rib is continuous around the flange and is as high as the bottom of the wrenching surfaces to reduce wobble during driving of the fastener head.
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 January 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 14, 2009.
- 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.