Single cam compound bow with interchangeable cams for varying draw length
CA 2183305 C · Owner: Evco Technology & Development Company Ltd. · Inventors: Phillips, Scott; Evans, John D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A cam assembly for a single cam bow provides replaceable cable sheaves. By selecting different cable sheaves the draw length of the bow may be altered while the bow is strung. The draw length can be further fine tuned by providing differentially spaced positions for attaching either end of the bow string to the cam assembly. A bow equipped with a cam assembly according to the invention can have a draw length adjustable in fine increments over a range of several inches.
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 14, 1996 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 2018.
- 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.