Sonar array mounting for sonobuoy
CA 2057898 C · Owner: Dowty Maritime Limited · Inventors: Buckingham, David Edwin James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sonobuoy comprises a sonar array mounted on arms (2) that are pivotally connected to a central support (3) and housed by an outer housing (1). Upon entry of the sonobuoy into water a float (8) is deployed which since it is connected to the central support (3) by a line arrests the downward motion of the central support (3). The outer housing (1) by, virtue of its inertia, travels on uncovering the arms (2) and positively locating the arms (2) by pulling on lines (17) connected to the arms (2). The use of the motion of the housing (1) to deploy the arms (2) eliminates the requirement for spring powered motors reducing the cost of the sonobuoy.
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 March 15, 1991 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 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.