Method and apparatus for inflating balloons and for deploying a load suspended therefrom
CA 1251431 A · Owner: University Corporation For Atmospheric Research · Inventors: Lichfield, Ernest W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a combination balloon-inflation and load-lowering device connectable to a pressurized source of a lighter-than-air gas such as helium and which comprises an inverted cup-shaped member closed at its upper end and open at its lower end containing one or more side-opening ports operative when covered by the neck of a balloon to cooperate therewith and form a one-way valve effective to automatically close and trap the lifting gas inside the balloon once the latter is inflated and the inflation pressure released. The combination device carries spaced-parallel disk-supporting arms hanging therebeneath that journal the shaft mounting a notched disk that forms a part of a …
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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
- Granted March 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 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.