Traffic barrier gate
CA 2037600 C · Owner: Energy Absorption Systems, Inc. · Inventors: Taylor, Wayne; Hardin, Paul W. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A traffic barrier gate for controlling the flow of vehicles through a barrier, such as a concrete median wall between opposing traffic lanes of a controlled access highway. In one embodiment the gate comprises hinged sidewall panels connected to a support member which is moved vertically on command and which when moved, causes the sidewall panels to collapse and spread out thereby forming a ramp for the passage of vehicles through the wall barrier. In a second embodiment, the gate revolves 180°, upon command and then, retracts into a well in the ground thereby forming the traffic ramp.
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 March 6, 1991 and granted January 11, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2013.
- 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.