Reinforcing bar coupling
CA 2086956 A1 · Owner: Young, Brian W. · Inventors: Young, Brian W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coupling fitting for making joints in reinforcing bars or wires for structural concrete utilising a sleeve-like device, and means for locating the bars or wires comprising positively adjustable engagers (7) and profiled engagers (13) at radial spacings relative to the axis of the sleeve (1). The positively adjustable engagers are received in threading (5) which has a higher yield strength and/or hardness than the sleeve material. In one embodiment the threading is part of an insert (4) received in a hole (3) in the wall of the sleeve (1), in another embodiment the threading is formed directly in the sleeve and is subject to localised hardening.
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 January 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2015.
- 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.