Expanding dowel with setting-force indicator
CA 1252319 A · Owner: Liebig, Heinrich · Inventors: Liebig, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An expanding anchor assembly for insertion into a bore in ground. The assembly comprises a one-piece expanding sleeve divided by longitudinal slits into segments. A conical expander engages the bore internal end of the expanding sleeve for expanding same. A bolt is also provided and has a bore internal end engaging the expander and a bore external end. A tightening member is provided on the bore external end of the bolt. A spacer bushing extends around the bolt and engages a sleeve-like tube section. A washer is provided beneath the tightening means for clamping a workpiece against the surface of the ground. The sleeve-like tube section is a soft steel tube section having a pronounced …
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 April 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2006.
- 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.