Triangular truss walkout cantilever
CA 1332666 C · Owner: Hayes, Philip A. · Inventors: Barrios, Richard C.; Hayes, Philip A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A triangular truss walkout cantilever for displaying railroad warning signals above the individual lanes of a road or highway at a railroad grade crossing is disclosed. The cantilever includes a cantilever arm attached to a vertical roadside mast. The cantilever arm has three parallel truss members that form a triangular cross section. These members are reinforced by a system of struts and braces. A catwalk allows a worker access to the warning signals for maintenance and no braces interfere with such access.
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 October 25, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 25, 2011.
- 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.