Stack system
CA 1235875 A · Owner: Kaldair Limited · Inventors: Bunce, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A guyed stack has a system of horizontal rings and vertical struts surrounding it to which the guy wires are attached. The rings and struts allow free expansion and contraction of the stack. The vertical struts support the vertical components of the guy tensions. The stack supports wind induced bending moments and shear forces. Friction between the stack surface and the horizontal rings under wind induced motion acts as a damping mechanism to suppress the motion and reduce the risk of dynamic instability.
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 May 3, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2005.
- 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.