US3896984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic conveyance system for particulate material
Assignee: Baker Perkins Holdings Ltd
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Filing: 1974-03-25
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Granted: 1975-07-29
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Expires: 1994-03-25
Abstract
Abstract A pneumatic conveyance system for particulate material, particularly for reclaiming chemically bonded moulding sand from foundry moulds. The material is broken down and/or scrubbed during conveyance through the system which has a surface portion formed with peaks and depressions positioned in the path of flow of the material which break down and/or scrub the material as it strikes said surface portion.
Inventors
- 👤 Albert Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/52; B65G53/526; Y; Y10; Y10S; Y10S241/00; Y10S241/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A METHOD OF TREATING PARTICULATE MATERIAL SAID METHOD WHEREIN A BELL FORMED ON AN END OF THE FIRST LENGTH IS ENGAGED UNSING SUCTION MEANS TO RECEIVE AND CONVEY AGGLOMERATED PARTICULATE MATERIAL, BREAKING DOWN IN A SEPARATOR MEANS THE PARTICULATE MATERIAL CONVEYED FROM THE SUCTION MEANS, SCREENING THE PARTICULATE MATERIAL AFTER THE LATTER HAS BEEN BROKEN DOWN AND RETURNING THE NON-SCREEN MATERIAL TO THE SUCTION MEANS SAID RECEIVING AND CONVEYING STEP INCLUDING DISPOSING AN INTERNAL SURFACE MEMBER HAVING PEAKS AND DEPRESSIONS FORMED THEREON WITHIN THE SUCTION MEANS IN THE PATH OF FLOW OF THE PARTICULATE MATERIAL SO THAT THE PARTICULATE MATERIAL IS BROKEN DOWN AND SCRUBBED BY COLLISION WITH THE INTERNAL SURFACE MEMBER DURING CONVEYANCE THROUGH SAID SUCTION MEANS.
Claim 2
Independent Claim
118 words
A METHOD OF TREATING PARTICULATE MATERIAL SAID METHOD WHEREIN A BELL FORMED ON AN END OF THE FIRST LENGTH IS ENGAGED UNSING SUCTION MEANS TO RECEIVE AND CONVEY AGGLOMERATED PARTICULATE MATERIAL, BREAKING DOWN IN A SEPARATOR MEANS THE PARTICULATE MATERIAL CONVEYED FROM THE SUCTION MEANS, SCREENING THE PARTICULATE MATERIAL AFTER THE LATTER HAS BEEN BROKEN DOWN AND RETURNING THE NON-SCREEN MATERIAL TO THE SUCTION MEANS SAID RECEIVING AND CONVEYING STEP INCLUDING DISPOSING AN INTERNAL SURFACE MEMBER HAVING PEAKS AND DEPRESSIONS FORMED THEREON WITHIN THE SUCTION MEANS IN THE PATH OF FLOW OF THE PARTICULATE MATERIAL SO THAT THE PARTICULATE MATERIAL IS BROKEN DOWN AND SCRUBBED BY COLLISION WITH THE INTERNAL SURFACE MEMBER DURING CONVEYANCE THROUGH SAID SUCTION MEANS.
Claim 3
Dependent Claim
104 words
Apparatus for treating particulate material comprising suction means for receiving and conveying agglomerated particulate material, separator means for receiving and breaking down the particulate material conveyed thereto from said suction means, screening means for receiving and screening broken down particulate material conveyed thereto from said separator means and for returning non-screened material to said suction means, said suction means being provided with an internal surface member having peaks and depressions formed thereon and disposed within the path of flow of particulate material whereby the particulate material is broken down and scrubbed by collision with the internal surface member during conveyance through said suction means.
Claim 4
Dependent Claim
104 words
Apparatus for treating particulate material comprising suction means for receiving and conveying agglomerated particulate material, separator means for receiving and breaking down the particulate material conveyed thereto from said suction means, screening means for receiving and screening broken down particulate material conveyed thereto from said separator means and for returning non-screened material to said suction means, said suction means being provided with an internal surface member having peaks and depressions formed thereon and disposed within the path of flow of particulate material whereby the particulate material is broken down and scrubbed by collision with the internal surface member during conveyance through said suction means.
Claim 5
Dependent Claim
41 words
Apparatus as claimed in claim 2, wherein said separator means is provided with a surface portion having peaks and depressions formed on at least a part of an internal wall thereof and a suction fan operatively associated with said separator means.
Claim 6
Dependent Claim
16 words
The pneumatic conveyance apparatus of claim 2 wherein said suction means comprises a curved conduit portion.
Claim 7
Dependent Claim
25 words
The pneumatic conveyance apparatus of claim 4, wherein the internal surface member forms at least a part of the conveyance wall of the conduit portion.
Claim 8
Dependent Claim
21 words
The pneumatic conveyance apparatus of claim 2, wherein said internal surface member comprises a ribbed plate forming said peaks and depressions.
Claim 9
Dependent Claim
16 words
The pneumatic conveyance apparatus of claim 6, wherein said ribbed plate is formed of white iron.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |