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Electronic cigarette

  • US 10,314,335 B2
  • Filed: 04/30/2014
  • Issued: 06/11/2019
  • Est. Priority Date: 05/02/2013
  • Status: Active Grant
First Claim
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1. An electronic cigarette comprising a generally cylindrical housing with a proximal mouth end and a distal end, and within the housing:

  • a vaporizer to produce vapor to be delivered to the mouth end;

    a battery; and

    sensor circuitry to detect a user drawing on the mouth end and connect the battery to power the vaporizer to produce vapor,the vaporizer comprising;

    a tube having inlet and outlet ends and extending longitudinally of the housing,supports at opposite ends of the tube for directing airflow into and out of the tube from the inlet to the outlet,a vaporizable liquid holder containing a vaporizable liquid extending around the tube,wicking fibers extending through side openings in the tube and configured to wick the vaporizable liquid from the vaporizable liquid holder into the tube, andan electrical heater coil in the tube configured to be powered by the battery to vaporize liquid on the wicking fibers in the tube, so that vapor is supplied along the tube to the outlet end when the user draws thereon,wherein the wicking fibers are wrapped around the outer surface of the tube in a spiral pattern so as the contact and receive the vaporizable liquid by capillary action from the vaporizable liquid holder, and wherein at least one of the wrapped wicking fibers extends towards at least one of the inlet end of the tube or the outlet end of the tube.

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