Tail fin unit for a projectile
CA 1323246 C · Owner: Qinetiq Limited · Inventors: Smith, Stephen George Gladwell; Walker, David Howard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A tail fin unit (10) moulded from a plastics material which ablates when subjected to both propellant flash temperatures and in-flight aerodynamic heating, consists of a fin unit body member (12) which is coaxially attachable to the rear end of the projectile, and which is provided with a plurality of radially protrusive fins (16) each disposed as a helix of constant pitch around the moulding axis of the unit. Ablation of the fins (16) may not occur evenly, but because they are of constant pitch any, erosion of their leading edges (20) will occur without detriment to the spin rate of the projectile in flight. A preferred unit moulded from polyester or epoxy resin filled with Kevlar aramid …
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 October 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 19, 2010.
- 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.