Patent ID: 8722282
Filing Date: 2014-05-13
Classification: H01M,Y02E,Y10T

Abstract:
1. A power unit comprising a coupling unit to couple with a fuel cartridge, the coupling unit comprising: a nozzle to receive fuel from the fuel cartridge, the nozzle having an entirely empty interior; an outer unit surrounding the nozzle; a selection key disposed on the outer surface of the outer unit, to selectively mate with the fuel cartridge, an inner portion having an inner space including a poppet that moves into the power unit when the fuel cartridge and the power unit are coupled, wherein the nozzle and the poppet at least partially define a fuel flow channel, and a middle plate between the outer unit and the inner space of the coupling unit, the nozzle extending from a center of the middle plate into the outer unit, the middle plate including holes spaced apart from the nozzle, the holes exposing the poppet inside the inner space, wherein the position of the nozzle is lower than an end of the outer unit and higher than the selection key, the fuel passes through the nozzle, and the nozzle and the outer unit are one body.