Introduced in the anchoring systems by means of thread bolts
CA 1278446 C · Owner: Sanchez Velasco, Vicente · Inventors: Sanchez Velasco, Vicente
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed an anchoring system in concrete having a predrilled hole with an undercut. The anchoring system includes a cylindrical rod that is threaded at one end and has a truncated conical head at the other end. A sleeve extends over the lower portion of the cylindrical rod above the truncated conical head. The cylindrical rod is inserted into the hole so that the sleeve is adjacent to the undercut. The sleeve is fixed against being subsequently withdrawn. The cylindrical rod is then rotated relative to the sleeve thereby lifting up the truncated conical head into the sleeve so as to press against and thereby expand the sleeve outward against the walls of the undercut.
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 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 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.