US4480681A
Expired / Lapsed
US
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Refractory mould body and method of casting using the mould body
Assignee: FAIREY INDUSTRIAL CERAMICS Ltd
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Filing: 1982-08-30
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Granted: 1984-11-06
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Expires: 2002-08-30
Abstract
Abstract A refractory mould core for producing metallic castings of complicated internal shape formed from a water-soluble salt having the following particle size distribution: 100% by weight of the particles have a size less than 750 μm; 90% by weight of the particles have a size of 8-600 μm; 80% by weight of the particles have a size of 5.5-500 μm; 70% by weight of the particles have a size of 4-400 μm; 60% by weight of the particles have a size of 2.8-350 μm; 50% by weight of the particles have a size of 2.0-280 μm; 40% by weight of the particles have a size of 1.6-220 μm; 30% by weight of the particles have a size of 1.0-180 μm; 20% by weight of the particles have a size of 0.3-160 μm; 10% by weight of the particles have a size of 0.1-125 μm.
Inventors
- 👤 Kevin Alexander
- 👤 Howard J. Farr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:19
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/10; B22C9/105
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A refractory body consisting essentially of a water-soluble salt having the following particle size distribution: 100% by weight of the particles have a size less than 750 μm; 90% by weight of the particles have a size of 8-600 μm; 80% by weight of the particles have a size of 5.5-500 μm; 70% by weight of the particles have a size of 4-400 μm; 60% by weight of the particles have a size of 2.8-350 μm; 50% by weight of the particles have a size of 2.0-280 μm; 40% by weight of the particles have a size of 1.6-220 μm; 30% by weight of the particles have a size of 1.0-180 μm; 20% by weight of the particles have a size of 0.3-160 μm; 10% by weight of the particles have a size of 0.1-125 μm.
Claim 2
Dependent Claim
136 words
A refractory body consisting essentially of a water-soluble salt having the following particle size distribution: 100% by weight of the particles have a size less than 750 μm; 90% by weight of the particles have a size of 8-600 μm; 80% by weight of the particles have a size of 5.5-500 μm; 70% by weight of the particles have a size of 4-400 μm; 60% by weight of the particles have a size of 2.8-350 μm; 50% by weight of the particles have a size of 2.0-280 μm; 40% by weight of the particles have a size of 1.6-220 μm; 30% by weight of the particles have a size of 1.0-180 μm; 20% by weight of the particles have a size of 0.3-160 μm; 10% by weight of the particles have a size of 0.1-125 μm.
Claim 3
Independent Claim
192 words
A method of producing a casting of a castable metal or alloy, comprising forming a mold assembly including a foundry mold part constituted by a composition which consists essentially of a water-soluble salt having the following particle size distribution: 100% by weight of the particles have a size less than 750 μm; 90% by weight of the particles have a size of 8-600 μm; 80% by weight of the particles have a size of 5.5-500 μm; 70% by weight of the particles have a size of 4-400 μm; 60% by weight of the particles have a size of 2.8-350 μm; 50% by weight of the particles have a size of 2.0-280 μm; 40% by weight of the particles have a size of 1.6-220 μm; 30% by weight of the particles have a size of 1.0-180 μm; 20% by weight of the particles have a size of 0.3-160 μm; 10% by weight of the particles have a size of 0.1-125 μm; introducing into the mold assembly a charge of the castable metal or alloy in molten form, allowing the charge to solidify, and removing the foundry mold part from the casting so formed.
Claim 4
Independent Claim
192 words
A method of producing a casting of a castable metal or alloy, comprising forming a mold assembly including a foundry mold part constituted by a composition which consists essentially of a water-soluble salt having the following particle size distribution: 100% by weight of the particles have a size less than 750 μm; 90% by weight of the particles have a size of 8-600 μm; 80% by weight of the particles have a size of 5.5-500 μm; 70% by weight of the particles have a size of 4-400 μm; 60% by weight of the particles have a size of 2.8-350 μm; 50% by weight of the particles have a size of 2.0-280 μm; 40% by weight of the particles have a size of 1.6-220 μm; 30% by weight of the particles have a size of 1.0-180 μm; 20% by weight of the particles have a size of 0.3-160 μm; 10% by weight of the particles have a size of 0.1-125 μm; introducing into the mold assembly a charge of the castable metal or alloy in molten form, allowing the charge to solidify, and removing the foundry mold part from the casting so formed.
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) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |