Expandable broadhead for an arrow
CA 2075522 A1 · Owner: Massey, Doug · Inventors: Massey, Doug; Massey, Doug
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A broadhead has an elongate body with an axial cavity and a plurality of longitudinal slots are spaced radially through the wall of the body and a blade is disposed in each of the longitudinal slots. Each of the blades is pivotally mounted at the end nearest the tip so that they may selectively pivot through the slot from a retracted position or an extended position. Each blade has a cam edge which fits within the slot associated with the blade when the blade is pivoted into the retracted position. A slug is adapted to slide within the longitudinal cavity of the body and engage the cams of the blades when the blades are in the retracted positions and cause the blades to project outwardly as …
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.
Why it's free to use
- Filed August 7, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2014.
- 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.