Expansion dowel assembly
CA 1096668 A · Owner: Hilti Aktiengesellschaft · Inventors: Seghezzi, Hans D.; Entner, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an expansion dowel assembly a stud or bolt extends, through an expansion sleeve with an expending body on one end for radially spreading the sleeve and a head or first working part on the other end for applying torque. A second working part encloses the first working part and is attached to it by one or more shear members. Torque for anchoring the sleeve in a borehole is applied through the second working part to the first working part and the stud. When a preset torque is reached, the shear members break and the second working part can move relative to the first working part without transmitting torque to tile stud. A separating member is provided between the first and second working …
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 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.