Collapsable helmet
CA 1089151 A · Owner: Takemi, Ryunoshin · Inventors: Takemi, Ryunoshin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A collapsible helmet has curved sections of generally similar shape arranged in a fan-like manner and movable relative to one another in a circumferential direction with circular plates formed on the sections and stacked for relative pivotation of the sections. Inner and outer joint portions provided at opposite sides of the sections have first and second fasteners, the first restricting the circumferential displacement of the sections relative to one another, and the second restricting outward displacement of the adjacent sections when the helmet is erected. A cap overlying the circular plates biases them towards one another so as to releasably retain the sections in a spread condition and …
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 November 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 1997.
- 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.