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US3572503A Expired / Lapsed US ⏱️ 0.0 years remaining

Trash segregation apparatus

Assignee: WASTE RECLAMATION CORP
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Filing: 1968-11-04
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Granted: 1971-03-30
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Expires: 1988-11-04
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Abstract

Abstract Apparatus for segregating trash in accordance with its specific gravity, comprising a vibratory conveyor which causes large or heavy pieces of material such as metal or wood to settle to the bottom and lighter material such as paper and cardboard to remain at the top, and a closed circuit conduit having a venturi above the conveyor with an opening in its throat directly over the conveyor, a blower anterior to the venturi in the conduit for producing a flow of air through the venturi whereby to create a pressure reduction at the venturi throat sufficient to lift the lighter materials, i.e., paper and cardboard, off the conveyor and into the venturi and to propel the material received therein through the venturi, a plurality of upwardly open hoppers communicating with the conduit ductwork posterior to the venturi whereby the heavier materials will be caused to fall, by their specific gravity into the first hopper and lighter materials will be caused to fall by their relative specific gravities into the succeeding hopper or hoppers. For discharging excess air down into the system through the venturi throat opening, from the system, a lateral discharge conduit including an air filter is provided posterior to the blower.

Inventors

  • 👤 William J Hezel

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 20:17
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/01; B03; B03B; B03B9/00; B03B9/06; Y; Y10; Y10S; Y10S209/00; Y10S209/92; Y10S209/93

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 116 words
Apparatus for segregating materials of different specific gravities from each other comprising conduit means, a venturi formed in said conduit means, a material inlet aperture formed in the bottom of said conduit means below said venturi, means for forcing air through said venturi, and a plurality of downwardly directed openings in said conduit means posterior to said venturi, said openings being arranged successively longitudinally of said conduit means whereby materials of different specific gravities drawn upwardly into said conduit means through said aperture by the suction created by said venturi and propelled past said venturi by the accelerated air current therein are caused to drop selectively through said openings in accordance with their relative specific gravities.
Claim 2
Dependent Claim 116 words
Apparatus for segregating materials of different specific gravities from each other comprising conduit means, a venturi formed in said conduit means, a material inlet aperture formed in the bottom of said conduit means below said venturi, means for forcing air through said venturi, and a plurality of downwardly directed openings in said conduit means posterior to said venturi, said openings being arranged successively longitudinally of said conduit means whereby materials of different specific gravities drawn upwardly into said conduit means through said aperture by the suction created by said venturi and propelled past said venturi by the accelerated air current therein are caused to drop selectively through said openings in accordance with their relative specific gravities.
Claim 3
Dependent Claim 28 words
Apparatus according to claim 1 wherein said conduit means forms a closed circuit, there being means communicating with said conduit means for discharging excess air into the atmosphere.
Claim 4
Dependent Claim 26 words
Apparatus according to claim 2 wherein said discharge means includes air filters means for removing impurities from the excess air before its discharge into the atmosphere.
Claim 5
Dependent Claim 28 words
Apparatus according to claim 1 including a vibratory conveyor beneath said aperture for stratifying various materials according to their specific gravity and conveying such materials to said aperture.
Claim 6
Dependent Claim 28 words
Apparatus according to claim 4 wherein a hood surrounds said aperture and depends from said conduit means to a level close to the material level on said conveyor.
Claim 7
Dependent Claim 31 words
Apparatus according to claim 3 wherein said means for forcing air through said venturi is a blower disposed in said conduit means posterior to said openings and anterior to said venturi.
Claim 8
Dependent Claim 24 words
Apparatus according to claim 6 wherein said air discharge means communicates with said conduit means posterior to said blower and anterior to said venturi.
Claim 9
Dependent Claim 33 words
Apparatus according to claim 7 wherein the general axial plane of said closed circuit conduit means is vertical with said venturi and said openings located in the bottom portion of said conduit means.
Claim 10
Dependent Claim 18 words
Apparatus according to claim 8 wherein said blower is located in the top portion of said conduit means.
Claim 11
Dependent Claim 27 words
Apparatus according to claim 9 wherein said air discharge means comprises a conduit depending from the upper portion of said conduit means close proximity to said blower.

References Cited (Backward Citations)

US888156A Cited
GB837801A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-03-29 1974-09-28 1975-03-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-03-29 1978-09-28 1979-03-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-03-29 1982-09-28 1983-03-30 $7700.00 Window Closed / Lapsed

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