Energy absorbing crash cushion
CA 2257680 C · Owner: Albritton, James R. · Inventors: Albritton, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Energy absorbing system (20) with one or more energy absorbing assemblies (86) is provided to reduce or eliminate the severity of a collision between a moving motor vehicle and a roadway hazard. Energy absorbing system (20) may be modified for use at a fixed roadside hazard such as the end of concrete barrier (310) or attached to the rear portion of highway service vehicle (22). Energy absorbing system (20) preferably includes impact attenuator (80) having at least one cutter (106, 108) and at least one energy absorbing element (100) slidably disposed relative to each other. Impact plate (82) is also attached to one end of impact attenuator (80) such that a collision by the motor …
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 June 6, 1997 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2019.
- 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.