US3919755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a high-strength heat-insulating casting
Assignee: Toyota Motor Corp
•
Filing: 1973-10-31
•
Granted: 1975-11-18
•
Expires: 1993-10-31
Abstract
Abstract A method of producing a high-strength heat-insulating casting consisting of a flexible ceramic molded liner product onto which a metallic article has been cast from molten metal, after which said liner has been impregnated with a heat-resistant binder.
Inventors
- 👤 Yasuhisa Kaneko
- 👤 Yasuhiko Komatsu
- 👤 Yasuo Okada
- 👤 Ryuichi Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/14; B; B22; B22D; B22D19/00; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/38; F01N2310/00; F01N2310/06; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927; Y10T29/49272; Y10T29/4998; Y10T29/49982; Y10T29/49984; Y10T29/49988; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/24997
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
METHOD OF MANUFACTURING A HIGH-STRENGTH HEAT-INSULATING CASTING WHICH COMPRISES THE STEPS OF MOLDING A FLEXIBLE POROUS CERAMIC LINER FROM A MIXTURE OF A REFRACTORY MATERIAL AND ALUMINA CEMENT, WHICH MIXTURE IS SUBSTANTIALLY FREE FROM ANY-RESTSTANT BINDER, CASTING AN ARTICLE WHICH IS TO CARRY SAID LINEAR BY FORMING MOLTEN METAL AGAINST SAID LINER, AND ORMING
Claim 2
Dependent Claim
54 words
METHOD OF MANUFACTURING A HIGH-STRENGTH HEAT-INSULATING CASTING WHICH COMPRISES THE STEPS OF MOLDING A FLEXIBLE POROUS CERAMIC LINER FROM A MIXTURE OF A REFRACTORY MATERIAL AND ALUMINA CEMENT, WHICH MIXTURE IS SUBSTANTIALLY FREE FROM ANY-RESTSTANT BINDER, CASTING AN ARTICLE WHICH IS TO CARRY SAID LINEAR BY FORMING MOLTEN METAL AGAINST SAID LINER, AND ORMING
Claim 3
Dependent Claim
23 words
Method as claimed in claim 1 in which said refractory material is selected from the group consisting of alumina, silica, cordierite and magnesia.
Claim 4
Dependent Claim
29 words
Method as claimed in claim 1 in which said heat resistant binder is selected from the group consisting of sodium silica, colloidal silica, primary aluminum phosphate and ethyl silicate.
Claim 5
Dependent Claim
29 words
Method as claimed in claim 1 in which said metal is selected from the group consisting of gray cast iron, spherical graphite cast iron, aluminum alloys, and cast steel.
Claim 6
Dependent Claim
43 words
Method as claimed in claim 1 in which said flexible ceramic molding is fired before said article is cast thereon to an extent insufficient to completely sinter said refractory material and cement together, and leaving said molding in a flexible, somewhat porous form.
References Cited (Backward Citations)
US3173451A
Cited
US3279443A
Cited
US3568723A
Cited
US3714971A
Cited
US3786795A
Cited
US3832273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |