Electrical box with laterally open polygonal bore
CA 1282855 C · Owner: Hubbell Incorporated · Inventors: Williams, Howard M. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, An electrical outlet box formed of metallic material has an integral boss that angularly aligns engages and, retains wiring device mounting screws. The boss has a bore for receiving the screw comprising in sequence a cylindrical surface having a diameter slightly larger than the crest diameter of the mounting screw threads and a self-tapping, surface defining generally a regular hexagon in transverse cross section. The hexagon has a diameter across its corners slightly larger than the crest diameter of the screw threads, and a diameter across its flat sides slightly larger than the root diameter of the screw threads and slightly smaller than the crest diameter of …
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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 April 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2008.
- 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.