US3929293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shredder crusher material reducer
Assignee: PCC INVESTORS Inc A DE CORP
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Filing: 1974-09-17
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Granted: 1975-12-30
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Expires: 1994-09-17
Abstract
Abstract A material reducer and separator apparatus employs a rotary hammer crusher to crush and/or shred the material and to throw the crushed and/or shredded material along a confined main path. The apparatus can utilize the hammers to generate an air flow which is used to carry the lighter material. The main path is provided with one or more lateral passages which may include air draft controls to effect classified separation of crushed and/or shredded materials. Provision may also be made for wetting the material during passage through the rotary hammer crusher to facilitate passage and tearing thereof.
Inventors
- 👤 William F Hahn
- 👤 Carl R Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:35
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/02; B02C13/04; B02C13/13; B02C13/26; B02C13/286; B02C23/00; B02C23/18; B02C2013/2869
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
180 words
In a material reduction apparatus comprising a rotor housing, means for introduction of material into said housing, rotatable means mounted in said housing for subjecting said material to blows for reducing and propelling away from said rotatable means a stream of solid material including lighter and heavier pieces, and means for causing a flow of air to travel along with said stream of solids over at least a portion of the path covered thereby, the improvement which comprises means defining a first confined path away from said rotatable means for receiving said stream and for causing it to continue in motion in the direction in which it is impelled by the blows of the rotatable means, at least until it passes beyond at least one additional confined path, and means defining said at least one additional confined path diverging from and between the ends of said first path, said at least one additional confined path including means for diverting at least a portion of said flow and at least a portion of said light pieces together from said first path.
Claim 2
Dependent Claim
180 words
In a material reduction apparatus comprising a rotor housing, means for introduction of material into said housing, rotatable means mounted in said housing for subjecting said material to blows for reducing and propelling away from said rotatable means a stream of solid material including lighter and heavier pieces, and means for causing a flow of air to travel along with said stream of solids over at least a portion of the path covered thereby, the improvement which comprises means defining a first confined path away from said rotatable means for receiving said stream and for causing it to continue in motion in the direction in which it is impelled by the blows of the rotatable means, at least until it passes beyond at least one additional confined path, and means defining said at least one additional confined path diverging from and between the ends of said first path, said at least one additional confined path including means for diverting at least a portion of said flow and at least a portion of said light pieces together from said first path.
Claim 3
Dependent Claim
26 words
Apparatus according to claim 1 including stator means positioned adjacent said rotatable means for shredding material by combined action of said rotating means and stator means.
Claim 4
Dependent Claim
52 words
Apparatus according to claim 2 wherein said rotatable means includes a plurality of hammers mounted for rotation in a hammer circle, said hammers being spaced apart laterally; and said stator means includes projections extending inwardly from said housing into said hammer circle between the paths of rotation of said laterally spaced hammers.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 3 wherein said projections are disposed laterally in staggered relation.
Claim 6
Dependent Claim
21 words
Apparatus according to claim 3 wherein adjustable means are provided for withdrawing said projections partially or completely from said hammer circle.
Claim 7
Dependent Claim
21 words
Apparatus according tO claim 4 wherein adjustable means are provided for withdrawing said projections partially or completely from said hammer circle.
Claim 8
Dependent Claim
16 words
Apparatus according to claim 1 wherein means are provided in said apparatus for wetting the material.
Claim 9
Dependent Claim
39 words
Apparatus according to claim 1 wherein a receptacle for reduced material is connected to said at least one additional confined path and said means for diverting at least a portion of said flow includes adjustable air flow control means.
Claim 10
Dependent Claim
52 words
Apparatus according to claim 1 characterized in that said rotatable means includes a plurality of hammers mounted for rotation in a hammer circle, said hammers each being provided with plural tip portions spaced apart laterally; and projections extend into said hammer circle between the paths of rotation of said hammer tip portions.
Claim 11
Dependent Claim
20 words
Apparatus according to claim 9 wherein means are provided for withdrawing said projections partially or completely from said hammer circle.
Claim 12
Dependent Claim
38 words
Apparatus according to claim 1 wherein a plurality of said apparatus is arranged in series wherein a discharge of one machine in said series communicates with a means for introduction of material of another machine in said series.
References Cited (Backward Citations)
US447027A
Cited
US1469877A
Cited
US1290895A
Cited
US2095385A
Cited
US2446095A
Cited
US2669271A
Cited
US2828923A
Cited
US2922585A
Cited
US3111248A
Cited
US3322353A
Cited
US3513858A
Cited
US3442458A
Cited
US3612415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |