US3175686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cooling and reconditioning molding sand
Assignee: Individual
•
Filing: 1961-10-03
•
Granted: 1965-03-30
•
Expires: 1981-10-03
Abstract
No abstract record available.
Inventors
- 👤 Rieth Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:31
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF COOLING AND RECONDITIONING MOLDING SAND COMPRISING THE STEPS OF DROPPING HOT MOLDING SAND IN A JACKET-LIKE SUBSTANTIALLY VERTICALLY DOWNWARDLY DIRECTED STREAM; FEEDING A STREAM OF COMPRESSED AIR ALONG A SUBSTANTIALLY CONICAL DOWNWARDLY DIRECTED PATH INTO THE INTERIOR OF SAID JACKET-LIKE SAND STREAM WHILE THE LATTER MOVES DOWNWARDLY UNDER THE INFLUENCE OF GRAVITY SO THAT THE AIR STREAM WILL INTERSECT SAID SAND STREAM AT A LOWER PORTION THEREOF; AND SUBJECTING THE THUS COMBINED STREAMS TO A COMBINED CENTRIFUGAL AND BEATING ACTION SO THAT THE MOLDING SAND AND THE AIR WILL BE THOROUGHLY MIXED WITH EACH OTHER.
Claim 2
Independent Claim
98 words
A METHOD OF COOLING AND RECONDITIONING MOLDING SAND COMPRISING THE STEPS OF DROPPING HOT MOLDING SAND IN A JACKET-LIKE SUBSTANTIALLY VERTICALLY DOWNWARDLY DIRECTED STREAM; FEEDING A STREAM OF COMPRESSED AIR ALONG A SUBSTANTIALLY CONICAL DOWNWARDLY DIRECTED PATH INTO THE INTERIOR OF SAID JACKET-LIKE SAND STREAM WHILE THE LATTER MOVES DOWNWARDLY UNDER THE INFLUENCE OF GRAVITY SO THAT THE AIR STREAM WILL INTERSECT SAID SAND STREAM AT A LOWER PORTION THEREOF; AND SUBJECTING THE THUS COMBINED STREAMS TO A COMBINED CENTRIFUGAL AND BEATING ACTION SO THAT THE MOLDING SAND AND THE AIR WILL BE THOROUGHLY MIXED WITH EACH OTHER.
References Cited (Backward Citations)
DE326149C
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US1469993A
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US1478526A
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US1989406A
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FR1006420A
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FR1095582A
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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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |