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US 4,474,117 AGranted
Boiler using a solid granulated fuel
OwnerPaul Marollaudinventor
Life of this patent
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Abstract
The invention relates to boilers using solid fuels in granular form. It comprises: (a) automatic feeding of the firebox with fuel by a reciprocating piston system forming a fire barrier in the rest position and actuated by a low power linear movement motor, and (b) combustion quickened by the supply of blown air and stirred by a system for discharging ashes and combustion residues out of the burner by the action of fingers integral with the piston. This type of boiler is suited for central heating as well as any other domestic or industrial hot water production.
Claims9
A hot water boiler which burns solid fuel in granular form comprising:
- (1) a fire box with a combustion gas outlet, an opening at the bottom of said fire box to remove ashes, an orifice between said combustion gas outlet and said bottom opening, and a grate at orifice level;
- (2) a hopper adjacent the exterior of said fire box for storing and discharging the solid fuel, including a discharge opening at the lower end of said hopper;
- (3) an automatic feeder located under the discharge opening of said hopper comprising a reciprocating piston communicating with said orifice wherein said piston forms a fire barrier in the rest position by blocking said orifice and serves to close off said hopper;
- (4) fingers integrally formed with said reciprocating piston, which project into said fire box through said orifice and poke the fire with each reciprocating movement;
- and
- (5) wherein said grate comprises grooves in which said fingers slide with each reciprocating move and poke said fire and discharge said burned residue through the grate toward said bottom of said firebox.
3 more elements
Dependencies are inferred from the claim text.