Patent Application
20200333010
In United States patent application US2014/0238378, entitled, “PELLET BURNING FIRE PIT”, published on Aug. 28, 2014, invented by Monty Scott there is disclosed an apparatus for burning biomass sources, such as a fire pit for burning wood pellets. A firepit may include a burning chamber having a floor and an opening at the top, and secondary chamber having a bottom, at least one air intake, and at least one air escape. The secondary chamber may be heated by the burning chamber. The at least one air intake may be located near the bottom of the secondary chamber, while the at least one air escape may be located near the top of the burning chamber. In addition, the primary chamber opening may guide flames out of the burning chamber. The secondary chamber may also include a roof, which may overhang said burning chamber.
The present invention is a mobile apparatus for burning biomass fuel. The apparatus comprises a housing that has at least one wall, a bottom, and an open top. The housing contains a moveable fire pot. The moveable fire pot has a plurality of openings in a side of the moveable fire pot, near its a bottom. There is a holding bin. This bin is attached to at least one wall of the housing and near the open top.
There is a heat shield wall located between the bin and the fire pot.
There is a motor configured with a gear box that is electrically energized. The motor is controlled by a rheostat. The motor and gear box are attached to at least one wall of the housing below the holding bin. There is an auger. This auger is driven by the motor and gear box. The auger passes through at least one wall with a distal end extending over the top of the moveable fire pot.
There is an air motor that is electrically energized and the air motor is attached to at least one wall of the housing such that air is forced into the moveable fire pot openings. The air motor is controlled by a rheostat.
Attached to the back panel 6 is a holding bin 22. The holding bin 22 contains biomass that is feed into the housing 4 and fire pot 18. The biomass is feed from the holding bin 22 into the fire pot 18 by an auger 30. The auger 30 has a housing 32 that retains the biomass as it travels along the travel of the auger 30 until it reaches the distal end 34 and is eventually fed into the movable fire pot 18.
The moveable campfire 2 has a battery 28 that supplies power to the motor 24, blower 36 and the thermostat 40. The battery and electronic equipment are connected by wiring.
The auger 30 is operated by an electric motor 24. This electric motor 24 drives a gear box 26 which in turn rotates the auger 30 that manipulates the biomass contained in the holding bin 22.
The battery 28 also powers the blower 36. The blower 36 is controlled by the thermostat 40. The indication by the thermostat 40 for more heat triggers the electric motor 24 which drives the gear box 26 feeding more biomass from the holding bin 22 into the moveable fire pot 18. It also signals the blower to respond by supplying forced air to circulate the heat.
