Patent US3552662A successfully refreshed from Google Patents.
US3552662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for regaining components of knocked-out mold and core sand and pieces
Assignee: Alfred Gutmann Gesellschaft fuer Maschinenbau
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Filing: 1968-12-20
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Granted: 1971-01-05
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Expires: 1988-12-20
Abstract
Abstract A device for regaining components of knocked-out mold and core sand pieces, in which said knocked-out pieces are crushed in a container and conveyed through perforations to a separator for filtering out the dust component from the crushed material and feeding the remainder into a storage container.
Inventors
- 👤 Konrad Grob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:10
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/18; Y; Y10; Y10S; Y10S241/00; Y10S241/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A device for regaining components of knocked-out mold and core sand pieces, which includes: housing means having an inlet and bottom and also having a housing wall portion provided with perforations, rotatable beater means arranged within said housing means adjacent said bottom for crushing knocked-out mold and core sand pieces fed into said housing means through said inlet, and for centrifuging granules and particles corresponding in size to the size of said perforations through the latter, collecting vessel means communicating with said perforations for collecting the crushed material passed from the inside of said housing means through said perforations, and separator means adapted to withdraw crushed material from said collecting vessel means and to separate sand granules from said withdrawn crushed material.
Claim 2
Independent Claim
122 words
A device for regaining components of knocked-out mold and core sand pieces, which includes: housing means having an inlet and bottom and also having a housing wall portion provided with perforations, rotatable beater means arranged within said housing means adjacent said bottom for crushing knocked-out mold and core sand pieces fed into said housing means through said inlet, and for centrifuging granules and particles corresponding in size to the size of said perforations through the latter, collecting vessel means communicating with said perforations for collecting the crushed material passed from the inside of said housing means through said perforations, and separator means adapted to withdraw crushed material from said collecting vessel means and to separate sand granules from said withdrawn crushed material.
Claim 3
Dependent Claim
21 words
A device according to claim 1, in which beater means include beater blades with upwardly and downwardly bent outer end portions.
Claim 4
Dependent Claim
53 words
A device according to claim 1, in which said housing bottom is provided with an air inlet opening, and in which the bottom side of said beater blades is provided with vanes operable to draw air through said air inlet opening into said housing and to direct said drawn-in air toward said perforations.
Claim 5
Dependent Claim
72 words
A device according to claim 1, which includes container means, and filter means, and in which said separator means is formed by a centrifugal separator operable to separate the dustlike component from the crushed material received from said vessel means and to convey said dustlike component from the crushed material received from said vessel means and to convey said dustlike component to said filters while conveying the remainder to said container means.
Claim 6
Dependent Claim
20 words
A device according to claim 1, which includes suction funnel means interposed between said vessel means and said separator means.
References Cited (Backward Citations)
US1977771A
Cited
US2945633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |