Electromagnetic acoustic transducer for bolt tension and load measurement
CA 2183338 C · Owner: Maclauchlan, Daniel T. · Inventors: Powers, Thomas; Maclauchlan, Daniel T.; Whaley, Hubert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for measuring a load on a part such as a bolt (2) comprises, a socket (15) have walls defining an interior space (17) wherein the socket engages the bolt for transmitting a load to the bolt. An electromagnetic acoustic transducer (20) comprising a magnet (28) and a coil (26) is located in the interior space of the socket near the bolt. The coil provides a current while the magnetprovides a magnetic field such that the magnet and the coil generate an ultrasonic signal with the bolt. A detector is used to detect and measure a change in the ultrasonic signal at the bolt.
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 January 31, 1995 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2017.
- 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.