A method and apparatus for measuring forces in the presence of external pressure
CA 2380372 C · Owner: Demia, Laurent · Inventors: Demia, Laurent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to measure forces F exerted on a part in a given direction and in the presence of an external pressure p, the part has integrated therein a sensor (10) which delivers an output signal of the form S = .alpha..F + .beta..p + .gamma. and said sensor is dimensioned in such a manner as to cause the coefficient .beta. to be zero. To this end a sensor (10) is used that , includes a tube (12) formed by a thinner walled portion (12a) and a thicker walled portion (12b), together with strain gauges (16a 16b, 18a, 20) mounted , in the tube (12) and interconnected to form a Wheatstone bridge.
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 September 1, 2000 and granted February 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 2022.
- 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.