Blind fastener and method of making
CA 2066432 A1 · Owner: Pratt, John D. · Inventors: Pratt, John D.; Zermeno, Mario A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blind fastener comprises a fastener body (12) a stem (14) and , a shaped shear ring wire (18). The shear ring (18) in one embodiment is disposed in an annular groove (36) disposed intermediate the ends of a neck of the stem (14). When the fastener is installed, a bulbing portion (44) of the shear ring (18) upsets the tail end of the fastener and then shears at a predetermined load. An anchor portion (42) of the shear ring (18) travels through the fastener body, with the stem neck radially expanding the fastener to fill the hole within the workpieces (24) being secured together. A lock ring groove (34) is formed in the stem midsection of smaller diameter at the intersections of the stem …
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 August 22, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2012.
- 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.