Parts feeding apparatus of the piezoelectric drive type

Details Parts feeding apparatus of the piezoelectric drive type Parts feeding apparatus of the piezoelectric drive type

1986-06-06

1989-01-03

Taylor, Dennis L.

Conveyors: power-driven

Conveyor section

Reciprocating conveying surface

198766, B65G 2708

Patent

active

047950250

ABSTRACT:
A parts feeding apparatus of the piezoelectric drive type consists of a base, a plurality of bimorph cell assemblies each including a leaf spring the lower end of which is fixed to the base and two piezoelectric elements each fixed on respective sides of each leaf spring to vibrate each leaf spring when AC voltage is applied to the piezoelectric elements, and a conveyor connected with the lower end of each connecting member. Furthermore, the upper end of each bimorph cell assembly is connected with the lower end of each connecting member so that the vibration of each bimorph cell assembly is transmitted to the conveyor to feed articles placed on it. Each connecting member has lower bending stiffness than each leaf spring by forming one or more semicircular cut-out portions in it or selecting its thickness or its material so that an external force acting on each piezoelectric element in vibration is decreased.

REFERENCES:
patent: 2243936 (1941-06-01), Wurzbach et al.
patent: 2951581 (1960-09-01), Long et al.
patent: 3447671 (1969-06-01), Schweinfurth
patent: 3627112 (1971-02-01), Smith
patent: 3700094 (1972-10-01), Parr
patent: 3729090 (1973-04-01), Hacker
patent: 3915292 (1975-10-01), Brown

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