Hand-held three-dimensional drawing device

  • US 9,731,444 B2
  • Filed: 08/07/2015
  • Issued: 08/15/2017
  • Est. Priority Date: 12/05/2012
  • Status: Active Grant
First Claim
Patent Images

1. A three-dimensional (3D) drawing device comprising:

  • a housing configured to fit in a user'"'"'s hand and shaped to allow manipulation of the housing like a pen, the housing having a first end, a second end, and a port configured for introduction of a strand of feed stock into an internal volume of the housing, the housing having at least one cooling port extending between the internal volume and an ambient atmosphere;

    a first actuator and a second actuator each coupled to the housing and positioned to be actuated by the user'"'"'s hand while holding the housing;

    a motor disposed within the internal volume and controlled in response to operation of the first actuator and the second actuator;

    a gear train operatively coupled with the motor to drive the gear train, disposed within the internal volume to receive the strand of feed stock, and configured to move the strand of feed stock when engaged with the gear train; and

    a nozzle assembly disposed at the first end of the housing and at least partially within the housing, the nozzle assembly comprising an extruder, an exit nozzle, and a guide tube, the extruder having a heating element surrounded by an insulator, the guide tube extending between the gear train and the extruder, a first end of the guide tube positioned to receive the strand of feed stock from the gear train, a second end of the guide tube aligned with a chamber of the extruder such that the strand of feed stock is directed into the chamber, the extruder being disposed between the guide tube and the exit nozzle such that rotation of the motor causes the strand to be extruded out of the exit nozzle for permitting the user to draw in free space to form a three-dimensional object.

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