Vehicle crash cushion
CA 2114770 C · Owner: Stephens, Barry D. · Inventors: Stephens, Barry D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vehicle crash cushion (10) is mounted to a wall (W) adjacent to a roadway (R). The cushion (10) includes an array of panels (12) positioned to overlap one another and oriented parallel to the wall (W). A mechanical linkage (16) couples the panels (12) to the wall (W) and suspends the panels (12) above grade such that the panels (12) are movable toward the wall (12). Energy absorbing elastomeric tubes (30) are positioned between the panels (12) and the wall (W) such that movement of the panels (12) toward the wall (W) deforms the energy absorbing elastomeric tubes (30) thereby, retarding movement of the panels (12) toward the wall (W) .
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 February 2, 1994 and granted August 4, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2016.
- 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.