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US 4,398,826 AGranted
Asphaltic concrete recycling apparatus
OwnerRobert L. Mendenhallinventor
Life of this patent
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OwnerRobert L. Mendenhallinventor
Estimating the term…
An improved asphaltic concrete recycling apparatus comprises an elongated drum having an open inlet port at a first drum end and a product recovery port adjacent a second and opposite drum end, a burner adjacent the first drum end for introducing hot gases of combustion into the inlet port, and an elongated sleeve extended along the interior of the drum intermediate the first and second ends for directing the hot gases of combustion toward the second drum end. In the preferred embodiment, the first end of the sleeve is located in a portion of the drum where a veil of composition is avoided during drum rotation, and the second sleeve end is located in a drum portion where a curtain or veil of composition is formed.
An elongated rotatable drum having an open inlet port at a first drum end for introducing composition therein, a burner adjacent said first end for introducing hot gases of combustion into said inlet port, a recovery port adjacent a second drum end, closure means for closing said recovery port except to the extent necessary for recovering composition therefrom, and an elongated sleeve entirely within said drum and extending along the drum length intermediate said first and second drum ends for directing a portion of said hot gases toward said second drum end.
In a rotatable drum for gradually heating particulate composition between an input and output end having an open port at said input end for introducing said composition and for introducing hot gases of combustion, a port at said output end for recovering said composition, and means for maintaining said port at said output end closed except to recover said composition, the improvement comprising means for directing a portion of said hot gases, toward said output end comprising an elongated sleeve entirely within said drum extending along the drum length and spaced substantially from said input and output ends.
Dependencies are inferred from the claim text.