Blast gauge
CA 2089089 A1 · Owner: G. D. Engineering Associates Limited · Inventors: Edwards, David Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The blast gauge comprises a spherical fairing containing four pressure sensors whose positions on the surface of the sphere form the apices of a tetrahedron. The fairing may comprise a solid metal sphere with cavities adapted to house the pressure sensors in which the metal is aluminium or an alloy thereof or a foam filled spherical shell containing cavities adapted to house the pressure sensors. The spherical fairing is carried by a tubular support adapted to contain the signal leads from the sensors. In a preferred form the blast gauge includes computing means adapted to receive the signals from the pressure sensors and provide data showing the velocity and direction of any shock wave …
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
- Filed August 2, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2013.
- 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.