Dental materials dispenser and applicator

  • US 4,582,488 A
  • Filed: 04/27/1984
  • Issued: 04/15/1986
  • Est. Priority Date: 04/27/1984
  • Status: Expired due to Term
First Claim
Patent Images

1. A dental material dispenser comprising:

  • an elongate holder containing an axial chamber;

    an elongate passage, within said chamber, containing a charge of material and having a hollow needle at one end through which material can be extruded and a piston at the other end for expelling the material;

    an actuator supported in the chamber in axial alignment with the piston;

    means for moving the actuator axially to cause the piston to push material from the elongate passage through the needle;

    a driving element coupled to said means for moving the actuator;

    a motor coupled to said driving element for producing the movement of said actuator;

    manually controlled switch means for operating said dispenser;

    electronic controller means, responsive to said switch means, for controlling the speed and direction of said motor; and

    sensor means responsive to rotation of said driving element to generate position signals indicative of movement of said actuator for a predetermined distance.

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