Laminated nut with one way installation
CA 1297709 C · Owner: Pac-Fasteners · Inventors: Reynolds, Richard Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminated nut comprising a plurality of conical spring disc washers and a cage for receiving and holding the disc washers in a stacked, aligned relationship to define a central opening threaded to be matably received upon an associated threaded bolt including, protrusion means extending radially outwardly from the cage to, inhibit gripping of the nut by a wrenching tool at one axial end whereby the nut will only be threaded onto the bolt by the wrenching tool beginning with the opposite end of said nut.
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 March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 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.