Insulation fastener system
CA 1105299 A · Owner: Construction Fasteners, Inc. · Inventors: Hulsey, Tommy R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fastener system is disclosed that is adapted for attaching sheet insulation material to a corrugated sheet metal base, such as a roof deck, which includes a hold-down plate in the form of a regular polygon having at least five sides and a screw fastener. The hold-down plate is designed with circular ridges to absorb transient dynamic forces and with circumferential linear ridges to provide rigidity. The preferred screw fastener is a drill screw in which the major diameter of the drill flights does not exceed the minor diameter of the screw flights.
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 July 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 1998.
- 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.