Mine roof or rock bolt expansion anchor of the bail type
CA 1110091 A · Owner: Stratabolt Corporation · Inventors: Hansen, Roger M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bail type expansion anchor for mine roofs and the like including a threaded bolt, and expander cone nut and an ex-, pansible shell assembled together with the shell formed from an, integral blank of sheet metal having a pair of initially flat rectangular leaves bent to semi-cylindrical configuration with side edges thereof in abutment with each other to define a complete cylinder and having a bail strap of U-shaped configuration extending upwardly from the leaves and along side the cone nut. The bolt is threaded through the cone nut with the cone nut extending between the leaves of the shell, and the bail portion of the shell includes a circular top portion having a pop-out center having …
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 October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 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.