High power piezoelectric bender
CA 1055146 A · Owner: Motorola · Inventors: Schafft, Hugo W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bimorph bender is comprised of a pair of piezoelectric circular discs having diametrically opposed surface portions. Signal carrying electrodes are formed contiguous with each surface portion. A center vane is sandwiched between the discs maintaining them in a fixed spaced relation. The bender dishes in response to the electrical signals appearing at the electrodes. Mechanical coupling to the bender is provided by a washer which is affixed in the central portion of the bender. The washer is made of a high specific stiffness material for maintaining a high electro-mechanical coupling factor. The resulting structure provides a highly reliable and efficient power transducer.
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
- Granted May 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 1996.
- 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.