Patent US6060713A successfully refreshed from Google Patents.
Patent US4155492A successfully refreshed from Google Patents.
US4155492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopper valve for a pouring ladle
Assignee: SEATON ENGR Inc
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Filing: 1977-12-15
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Granted: 1979-05-22
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Expires: 1997-12-15
Abstract
Abstract An air cooled ceramic stopper valve and actuating rod for a bottom pouring ladle. Ceramic parts are assembled onto a metallic stopper rod which contains an enlarged head portion. The metallic stopper rod head is notched, so that refractory cement used to bond the ceramic parts forms a strong mechanical bond between the metal rod and the ceramic point of the valve. The notches provide enough strength in the joint between metal rod to ceramic point to permit shearing loose a frozen stopper valve by rotation (when the valve head [point] bonds to the ceramic orifice).
Inventors
- 👤 William W. Seaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:40
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/16; B22D41/18; B22D41/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
Apparatus for controlling the discharge of molten metal through a bottom opening of a casting container comprising a ceramic valve head, a metallic stopper rod for actuating the valve head, said metallic stopper rod having an enlarged end portion extending into and being cemented to the valve head, the outer surface of the enlarged end portion of the metallic stopper rod containing a plurality of vertically extending notches so a good bond exists between the rod and valve head, refractory sleeve means surrounding and slightly spaced from the metallic stopper rod, and means for introducing air into the space therebetween.
Claim 2
Dependent Claim
100 words
Apparatus for controlling the discharge of molten metal through a bottom opening of a casting container comprising a ceramic valve head, a metallic stopper rod for actuating the valve head, said metallic stopper rod having an enlarged end portion extending into and being cemented to the valve head, the outer surface of the enlarged end portion of the metallic stopper rod containing a plurality of vertically extending notches so a good bond exists between the rod and valve head, refractory sleeve means surrounding and slightly spaced from the metallic stopper rod, and means for introducing air into the space therebetween.
References Cited (Backward Citations)
US809177A
Cited
US1573151A
Cited
US2195791A
Cited
SE319586B
Cited
US3386633A
Cited
US3554490A
Cited
US3979031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |