US3958623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooler-drier for castings and moulding sand
Assignee: IJMI BV
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Filing: 1974-06-28
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Granted: 1976-05-25
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Expires: 1994-06-28
Abstract
Abstract Apparatus is disclosed which functions to adjust the moisture content of casting sand as it is being recovered, so that the sand may be re-used without significant or further adjustment of its water content. The apparatus includes a cooler-drier which receives hot castings and sand and discharges the sand and castings separately. A water spray impinges upon the sand and castings as they are moved through the cooler-drier and a temperature sensor which senses the temperature of the sand/castings mixture at the inlet controls the water spray so that the discharged sand possesses a uniform and selected moisture content.
Inventors
- 👤 Bastiaan Vissers
- 👤 Willem Teunissen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:19
CPC Classifications
B; B22; B22D; B22D31/00; B22D31/002; B22D31/007; B22C; B22C5/00; B22C5/08; B22C5/085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A cooler-drier for castings and moulding sand comprising, in combination: a cooler-drier having a horizontally elongate conveying path defining a casting and moulding sand inlet at one end of said path, a sand outlet adjacent the other end of said path and a casting outlet at said other end of the path; means for feeding a mixture of hot castings and sand to said inlet; water spray means for directing water onto the mixture as it travels along said path and including a control valve for controlling the quantity of water so directed; and control means for causing said sand as delivered to said sand outlet to possess a uniform moisture content, said control menas comprising a temperature sensor for sensing the temperature of said mixture at said inlet and a control device for regulating said control valve in dependence on the temperature so sensed.
Claim 2
Dependent Claim
145 words
A cooler-drier for castings and moulding sand comprising, in combination: a cooler-drier having a horizontally elongate conveying path defining a casting and moulding sand inlet at one end of said path, a sand outlet adjacent the other end of said path and a casting outlet at said other end of the path; means for feeding a mixture of hot castings and sand to said inlet; water spray means for directing water onto the mixture as it travels along said path and including a control valve for controlling the quantity of water so directed; and control means for causing said sand as delivered to said sand outlet to possess a uniform moisture content, said control menas comprising a temperature sensor for sensing the temperature of said mixture at said inlet and a control device for regulating said control valve in dependence on the temperature so sensed.
Claim 3
Dependent Claim
26 words
A cooler-drier as defined in claim 1 including means for progressively sampling sand at said inlet, said temperature sensor being in contact with sand so sampled.
Claim 4
Dependent Claim
65 words
A cooler-drier as defined in claim 1 wherein said cooler-drier is in the form of a horizontally elongate drum and including means for rotating said drum, said drum having at least one sand sampling opening at said inlet and there being a sample-receiving device receiving sand periodically from said opening as the drum rotates, said temperature sensor being in contact with sand in said device.
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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |