Linear piezoelectric actuator with liner controlling frictional wear
CA 1066345 A · Owner: Western Electric Company, Incorporated · Inventors: Rongved, Leif; Poulsen, Martin E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure An electromechanical actuator is described having a movable member, a first piezoelectric transducer imparting discrete displacements to second and third piezoelectric transducers which either grip the movable member and transmit to it the displacements or provided sliding bearing surfaces for the movable member. An inert liner is interposed between the second and third transducers and the movable member for reducing wear. Such an actuator is, for example, useful as a linear positioner requiring a high precision of travel and/or a high degree of uniformity of motion.
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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 November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 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.