Expansion dowel
CA 1060686 A · Owner: Hilti Aktiengesellschaft · Inventors: Pfeifer, Heinz; Udert, Karl E.; Oechsle, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An expansion dowel consists of an axially extending sleeve slotted for a part of its length and an axially extending expansion body insertable into and displaceable through the bore in the sleeve for radially expanding the sleeve. The expansion body has at least one axially extending recess in its outer surface so that the expansion body can deform along the recess after a certain expanding force has been achieved. Further an axially extending bore can be formed through the expansion body with the recess opening into the bore.
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 August 21, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 21, 1996.
- 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.