Obturation in a firearm_
CA 1257998 A · Owner: Royal Ordnance P.L.C. · Inventors: Comley, Jack W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
Title: Obturation in a Firearm A riot control weapon comprises a barrel a fixed breech block, and, there-between a chamber having a loading aperture through which a cylindrical round of ammunition can be inserted and ejected the round, being insertable by firstly a translational movement to bring the forward end of the round into the chamber and secondly a rotational, movement during which the round is pivoted until the round is fully chambered in alignment with the barrel and wherein the chamber is, provided with an obturating surface which extends continuously from a point adjacent the forward end of the chamber adjacent the loading aperture, rearwardly and away from the loading aperture …
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
- Granted August 1, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 1, 2006.
- 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.