Carrier apparatus using ultrasonic actuator

Details Carrier apparatus using ultrasonic actuator Carrier apparatus using ultrasonic actuator

1990-10-29

1993-04-06

Schacher, Richard A.

Sheet feeding or delivering

Feeding

By means to convey sheet

271119, 226191, B65H 506

Patent

active

051997010

ABSTRACT:
This carrier apparatus employs an ultrasonic actuator comprising a piezoelectric actuator made of a piezoelectric element which extends and contracts in the radial direction of a cylindrical vibrator in the inner space of the cylindrical vibrator as a power source. This ultrasonic actuator elastically deforms the cross section of the peripheral wall of the cylindrical vibrator into an elliptical shape by the extension and contraction of the piezoelectric actuator, and transmits a driving force in a tangential direction to an article pressed on a predetermined position on the outer peripheral surface of the cylindrical body by utilizing the circumferential and radial transformations (or displacements) generated on the outer peripheral surface of the cylindrical vibrator upon elastic deformation of the elliptical shape.

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patent: 4754441 (1988-06-01), Butler
patent: 4868446 (1989-09-01), Kumada
patent: 4888515 (1989-12-01), Tamura
patent: 5000364 (1991-03-01), Thimon

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