US3694964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive blast cleaning system
Assignee: Pangborn Corp
•
Filing: 1970-11-13
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Granted: 1972-10-03
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Expires: 1990-11-13
Abstract
Abstract An abrasive blast cleaning system includes a pair of separators for separating sand from abrasive particles in conjunction with a no-bake molding procedure with crushing rollers being provided between the separators to crush small lumps of pea size sand.
Inventors
- 👤 Joseph E Bowling Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:20
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/08; B24C3/10; B24C3/14; B24C9/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
An abrasive blast cleaning system comprising abrasive blast means for removing a casting from a no-bake mold and creating a mixture which includes fine granulated sand and pea size lumps of sand and abrasive particles, separating means, conveying means for transporting at least a portion of said mixture to said separating means, said separating means comprising a first separator for receiving the portion of said mixture and separating it into individual streams which includes one stream of abrasive particles and pea size lumps of sand, a second separator under said first separator, crushing means between said first separator and said second separator for granulating the pea size lumps of sand in the one stream and feeding the one stream to said second separator, and said second separator separating the one stream into individual sub-streams of abrasive particles and granulated sand.
Claim 2
Dependent Claim
140 words
An abrasive blast cleaning system comprising abrasive blast means for removing a casting from a no-bake mold and creating a mixture which includes fine granulated sand and pea size lumps of sand and abrasive particles, separating means, conveying means for transporting at least a portion of said mixture to said separating means, said separating means comprising a first separator for receiving the portion of said mixture and separating it into individual streams which includes one stream of abrasive particles and pea size lumps of sand, a second separator under said first separator, crushing means between said first separator and said second separator for granulating the pea size lumps of sand in the one stream and feeding the one stream to said second separator, and said second separator separating the one stream into individual sub-streams of abrasive particles and granulated sand.
Claim 3
Dependent Claim
16 words
The system of claim 1 wherein said crushing means includes a pair of juxtaposed rotatable rollers.
Claim 4
Dependent Claim
29 words
The system of claim 2 wherein each of said first and said second separators is an air wash separator with an air curtain inlet and an air curtain outlet.
Claim 5
Dependent Claim
24 words
The system of claim 3 wherein said first separator includes a plurality of skimmer plates, and said second separator including a single skimmer plate.
Claim 6
Dependent Claim
31 words
The system of claim 4 wherein each of said separators includes discharge means for discharging a stream of granulated sand, and both of said discharge means communicating with a common hopper.
Claim 7
Dependent Claim
14 words
The system of claim 5 wherein said rollers are made of wear resistant polyurethane.
Claim 8
Dependent Claim
23 words
The system of claim 6 wherein said second separator includes means for feeding its stream of abrasive particles to said abrasive blast means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |