Vehicle crash barrier
CA 2067415 C · Owner: Laturner, John F. · Inventors: Laturner, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An energy-absorbing crash barrier is provided with multiple energy-absorbing elements. Each element includes an expanded metal sheet formed as a tubular column which is internally braced with foam. In some of the sections multiple metal columns are provided one eccentrically positioned within the other. The expanded metal columns provide the major energyabsorbing elements of the barrier, and the eccentrically positioned columns define a preferred bending direction which tends to redirect an axially impacting vehicle away from a hardpoint. The columns in the individual elements are graduated in axial stiffness such that a forward section tends to collapse before the rearward sections, …
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
- Filed April 28, 1992 and granted November 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2014.
- 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.