Patent US4506813A successfully refreshed from Google Patents.
US4506813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular assembly, method of preparing the assembly, apparatus for uphill teeming which incorporates the assembly and method of casting metal
Assignee: Individual
•
Filing: 1980-12-12
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Granted: 1985-03-26
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Expires: 2000-12-12
Abstract
Abstract Guide and runner assemblies for uphill teeming comprise a refractory tube in a sheath with an optional body of particulate material between the inner tube and sheath. The sheath may be combustible.
Inventors
- 👤 Terence G. Dughan
- 👤 George M. Farmery
- 👤 Derick A. Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:10
CPC Classifications
B; B22; B22D; B22D35/00; B22D35/04; B22D35/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A method of casting metal wherein a guide assembly is prepared by arranging a plurality of tubular elements of ceramic material end-to-end inside an outer tube with an annular space between the internal surface of the outer tube and the external surfaces of the elements, particles of a refractory material are coated with a curable binder, the annular space is packed with the coated particles, the binder is cured, molten metal is guided by means including the guide assembly from a source to a mould, the metal solidifies in the guide assembly, the outer tube burns and, after the metal in the guide assembly has solidified, the mass of refractory particles and the elements of ceramic material are disrupted to expose the metal.
Claim 2
Independent Claim
123 words
A method of casting metal wherein a guide assembly is prepared by arranging a plurality of tubular elements of ceramic material end-to-end inside an outer tube with an annular space between the internal surface of the outer tube and the external surfaces of the elements, particles of a refractory material are coated with a curable binder, the annular space is packed with the coated particles, the binder is cured, molten metal is guided by means including the guide assembly from a source to a mould, the metal solidifies in the guide assembly, the outer tube burns and, after the metal in the guide assembly has solidified, the mass of refractory particles and the elements of ceramic material are disrupted to expose the metal.
References Cited (Backward Citations)
US2269455A
Cited
US3322186A
Cited
US3672432A
Cited
US4259993A
Cited
US4296921A
Cited
US4356994A
Cited
EP0062524A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |