Furnaces – With control means responsive to a sensed condition – Feed control
Reexamination Certificate
2005-12-01
2010-06-22
Rinehart, Kenneth B (Department: 3743)
Furnaces
With control means responsive to a sensed condition
Feed control
C110S266000, C110S259000, C110S293000, C110S255000, C110S16500A
Reexamination Certificate
active
07739966
ABSTRACT:
This invention relates to a device (3) for the combustion of granular, solid fuel, for example pellets and the like, comprising; a combustion chamber (16), an air inlet (24) for feeding air to the combustion chamber (16) via at least one air chamber (38,39,40) and at least one air-duct (41,42) for attaining an air flow through the combustion chamber (16), a feeding and dosing arrangement (10, 11, 12) for feeding of the fuel into the combustion chamber (16), an ignition device (28) for ignition of the fuel, a control unit (32) for operation of the combustion device (3) and parts co-operating therewith, an outlet (26) for hot combustion gases from the combustion chamber (16), a movably arranged ash feeder (29) with a drive unit (30), controlled by the control unit (32) for automatic feeding of ashes, unburned fuel, and slag products (31), out of the combustion chamber (16), wherein the ash feeder (29) comprises a movable front part (51) having a perforated bottom which constitutes the above mentioned inner bottom (45), movable between at least an operative position (58), shutting the lower end of the fire place (44), and an ash evacuating position (59), wherein a first temperature sensor (S2) positioned in vicinity of said combustion chamber (16), which first sensor is connected to said control unit (32) arranged to allow activation of said drive unit (30) only if the sensed temperature (T) is below a critical value (Tcr).
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patent: EP1462721 (2004-09-01), None
Janfire AB
King & Spalding LLP
Rinehart Kenneth B
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