US3662809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing metal castings by using insulating pads in the mold
Assignee: Individual
•
Filing: 1969-10-03
•
Granted: 1972-05-16
•
Expires: 1989-10-03
Abstract
Abstract By incorporating in sand moulds, at or near places where there is risk of insufficient metal feed during casting, pads of bonded fibrous refractory material, metal feed may be substantially improved and the need for padding the casting avoided.
Inventors
- 👤 John Ernest Gotheridge
- 👤 Jack Morgan
- 👤 Edward John Jago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
B; B22; B22C; B22C9/00; B22D; B22D7/00; B22D7/06; B22D7/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
21 words
A process according to claim 1 wherein the pad consists substantially of fibrous refractory material, particulate refractory material and a binder.
Claim 2
Dependent Claim
25 words
A process according to claim 2 wherein the particulate refractory material is a member selected from the group consisting of silica, alumina and crushed coke.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein the fibrous refractory material is aluminosilicate fiber.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein the pad has a coating of refractory dressing on the side facing the mould cavity.
Claim 5
Dependent Claim
57 words
A process according to claim 1 wherein said lining pads are interposed in the sand mould to provide a layer of sand to contact the molten metal, the thickness of the pads being adjusted so that the temperature of the face of the pad away from the molten metal is below the melting point of the pad.
References Cited (Backward Citations)
US2500097A
Cited
US3110943A
Cited
US3204301A
Cited
US3103045A
Cited
US3262165A
Cited
US3273211A
Cited
US3212749A
Cited
US3433282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |