Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
An apparatus for thermally recovering resin coated sand comprising: a plurality of vertical walls defining a plurality of chambers connected in series flow relation, said chambers including first, intermediate preheating, heated, intermediate cooling and last chambers; said first and intermediate preheating chambers having an imperforate wall common with said intermediate cooling and last chambers; means for introducing heat to said heated chamber; means for introducing sand to be treated into said first chamber; means for removing treated sand from said last chamber; and means for introducing fluidizing air into each of said chambers including means for regulating the fluidizing air introduced to said first and last chambers independent of that introduced to the other chambers.
Claim 2
Independent Claim
115 words
An apparatus for thermally recovering resin coated sand comprising: a plurality of vertical walls defining a plurality of chambers connected in series flow relation, said chambers including first, intermediate preheating, heated, intermediate cooling and last chambers; said first and intermediate preheating chambers having an imperforate wall common with said intermediate cooling and last chambers; means for introducing heat to said heated chamber; means for introducing sand to be treated into said first chamber; means for removing treated sand from said last chamber; and means for introducing fluidizing air into each of said chambers including means for regulating the fluidizing air introduced to said first and last chambers independent of that introduced to the other chambers.
Claim 3
Dependent Claim
22 words
An apparatus as in claim 1 wherein said intermediate preheating and intermediate cooling chambers are arranged in counter flow heat flow relationship.
Claim 4
Dependent Claim
26 words
An apparatus as in claim 1 wherein said chambers are in fluid flow relationship through alternately upper and lower openings in the wall between adjacent chambers.
Claim 5
Dependent Claim
41 words
An apparatus as in claim 1 having also first temperature sensing means for sensing the temperature of the sand located in said heated chamber; said means for introducing heat into said heated chamber being responsive to said first temperature sensing means.
Claim 6
Dependent Claim
37 words
An apparatus as in claim 1 having also second temperature sensing means for sensing the temperature of said last chamber; means responsive to said second temperature sensing means for varying the flow of said second fluidizing air.
Claim 7
Dependent Claim
32 words
An apparatus as in claim 1 wherein the means for removing sand from said last chamber comprises an overflow spout in fluid flow relationship with the upper end of said last chamber.
Claim 8
Dependent Claim
38 words
An apparatus as in claim 1 wherein said first chamber has also a vertical perforated plate dividing said first chamber into inlet and outlet portions; means for removing settled heavy solids from the bottom of said inlet portion.
Claim 9
Dependent Claim
17 words
An apparatus as in claim 7 wherein said means for removing heavy solids comprises a removable basket.