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US RE36,960 EGranted
Muffle convection brazing/annealing system
AssigneeSeco/Warwick S.A.
InventorsJeffrey W. Boswell, Michael A. Schmidt
Life of this patent
Estimating the term…
Abstract
A convection muffle furnace for brazing and/or annealing a workpiece includes a muffle having towers formed integrally therewith and being mounted movable relative to a top wall of a furnace. Circulation fans are mounted in the towers so as to move along with the muffle during its expansion and contraction for producing forced convection heat transfer.
Claims21
A convection muffle furnace for brazing and/or annealing a workpiece comprising:
- a heating chamber formed by a bottom wall, a pair of side walls, a front wall, a rear wall and a top wall;
- a D-shaped muffle formed by side walls, a floor and a roof;
- the side walls of said muffle being disposed in a parallel, spaced-apart relationship to said side walls of said heating chamber and extending from the front wall of said heating chamber to the rear wall thereof;
- said muffle being divided into a plurality of successive individual convection brazing zones which are spaced apart from each other;
- a plurality of towers each being formed integrally with the roof of said muffle in each brazing zone and being mounted movably relative to the top wall of said heating chamber;
- a plurality of fans each being mounted and sealed in a corresponding one of said plurality of towers for creating an atmospheric convection current in each of said brazing zones;
- and
- direct-fired burners for heating the exterior of said muffle so as to increase the temperature of the atmospheric convection current;
- whereby said plurality of fans in said plurality of towers are movable along with said muffle during its expansion and contraction so as to provide increased heating rates and high thermal efficiencies.
6 more elements
A convection muffle furnace for brazing and/or annealing a workpiece comprising:
- a heating chamber formed by a bottom wall, a pair of side walls, a front wall, a rear wall and a top wall;
- muffle means disposed inside of said heating chamber and extending longitudinally from the front wall of said heating chamber to the rear wall thereof , said muffle means comprising a D-shaped muffle having planar side walls parallel to the side walls of the heating chamber, a planar floor connected to the planar side walls and a dome-shaped roof positioned above and connected to the planar side walls;
- said muffle means including tower means formed integrally therewith and being mounted movably relative to the top wall of said heating chamber;
- circulating means being mounted and sealed in said tower means for creating an atmospheric convection current;
- and
- direct-fired burners for heating the exterior of said muffle means so as to increase the temperature of the atmospheric convection current,
- whereby said circulating means in said tower means are movable along with said muffle means during its expansion and contraction so as to provide increased heating rates and high thermal efficiencies.
4 more elements
A convection muffle furnace for brazing and/or annealing a workpiece comprising:
- a heating chamber formed by a bottom wall, a pair of side walls, a front wall, a rear wall and a top wall;
- a D-shaped muffle having planar side walls parallel to the side walls of the heating chamber, a planar floor connected to the planar side walls and a dome-shaped roof positioned above and connected to the planar side walls, said muffle having at least one tower formed integrally therewith which is mounted movably relative to the top wall of said heating chamber;
- and
- a circulating fan being mounted in said at least one tower so as to move along with said muffle during its expansion and contraction.
1 more element
A convection muffle furnace for brazing and/or annealing a workpiece, comprising:
- a heating chamber formed by a bottom wall, a pair of side walls, a front wall, a rear wall and a top wall;
- D-shaped muffle means disposed inside of said heating chamber and extending longitudinally from the front wall of said heating chamber to the rear wall thereof;
- said muffle means including tower means formed integrally therewith and being mounted movably relative to the top wall of said heating chamber;
- a first thermocouple positioned within the muffle means and a second thermocouple positioned outside the muffle means and within the heating chamber, said first and second thermocouples providing temperature signals;
- circulating means being mounted and sealed in said tower means for creating an atmospheric convection current;
- and
- direct-fired burners for heating the exterior of said muffle means so as to increase the temperature of the atmospheric convection current,
- whereby said circulating means in said tower means are movable along with said muffle means during its expansion and contraction so as to provide increased heating rates and high thermal efficiencies.
5 more elements
A convection muffle furnace for brazing and/or annealing a workpiece comprising:
- a heating chamber formed by a bottom wall, a pair of side walls, a front wall, a rear wall and a top wall;
- a D-shaped muffle having at least one tower formed integrally therewith which is mounted movably relative to the top wall of said heating chamber;
- a first thermocouple positioned within the muffle and a second thermocouple positioned outside the muffle means and within the heating chamber, said first and second thermocouples providing temperature signals;
- and
- a circulating fan being mounted in said at least one tower so as to move along with said muffle during its expansion and contraction.
2 more elements
Dependencies are inferred from the claim text.