Patent ID: 6319002
Filing Date: 2001-11-20
Classification: A61C,B05C

Abstract:
A dental handpiece arranged for delivery of a composite material, and including a hollow chamber having means for releasable support and communication with a capsule having an internal reservoir for containing said composite material;said hollow chamber containing:a reversible electric motor;a source of electric current arranged to supply electric power to said motor;a retractable plunger having a hollow internal longitudinal bore, said bore including a threaded portion thereof, said plunger having a forward end communicating with the internal reservoir of said composite-containing capsule and wherein said retractable plunger is flexible for at least a portion of its length, allowing said plunger to substantially conform to the contour of the capsule internal reservoir;a drive shaft including a threaded drive portion engagable with the threaded portion of said bore of said retractable plunger, said drive shaft being coupled to said electric motor and arranged for reversible rotation by said motor; anda manually operated electric switching means, at least a portion of which is positioned externally of said handpiece chamber and being arranged for controlling electric current for alternative rotational operation of said electrical motor and consequent forward and rearward longitudinal movement of said plunger.