US3760993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide closure for receptacle for molten metals
Assignee: Interstop AG
•
Filing: 1971-05-20
•
Granted: 1973-09-25
•
Expires: 1991-05-20
Abstract
Abstract A slide valve for a steel ladle has a removable housing supporting a refractory orifice plate and a pivotally mounted removable cover plate supporting a refractory slide plate. Two spaced seals may be provided between the housing and the ladle.
Inventors
- 👤 E Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:17
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
A closure for the outlet orifice of a container for molten metal comprising a housing removably attached to a container for molten metal, a joint lying between the housing and the container which contains an elastic refractory sealer, a refractory orifice plate fixed in position within the housing having an orifice for discharge of molten metal, a refractory slide plate movably supported within the housing in sliding engagement with the orifice plate, a metal frame removably mounted in the housing supporting the orifice plate, a metal support for the slide plate, a refractory discharge sleeve below the slide plate, and a metal cover plate removably supported on the housing, wherein the housing is pivotally attached to the container in the manner of a gate and including means for removably retaining the housing at its pivot joint, whereby the contact pressures between the housing and the container and between the orifice plate and the slide plate are independent of each other.
Claim 2
Dependent Claim
160 words
A closure for the outlet orifice of a container for molten metal comprising a housing removably attached to a container for molten metal, a joint lying between the housing and the container which contains an elastic refractory sealer, a refractory orifice plate fixed in position within the housing having an orifice for discharge of molten metal, a refractory slide plate movably supported within the housing in sliding engagement with the orifice plate, a metal frame removably mounted in the housing supporting the orifice plate, a metal support for the slide plate, a refractory discharge sleeve below the slide plate, and a metal cover plate removably supported on the housing, wherein the housing is pivotally attached to the container in the manner of a gate and including means for removably retaining the housing at its pivot joint, whereby the contact pressures between the housing and the container and between the orifice plate and the slide plate are independent of each other.
Claim 3
Dependent Claim
23 words
Slide closure in accordance with claim 1, including suspension straps mounted on the housing to support the housing duing removal from the container.
Claim 4
Dependent Claim
30 words
Slide closure in accordance with claim 2, including mounting means for removably supporting the housing and the orifice plate therein in fixed and predetermined position with respect to the container.
Claim 5
Dependent Claim
21 words
Slide closure in accordance with claim 3, including refractory felt means forming a seal between the orifice plate and the containEr.
Claim 6
Dependent Claim
28 words
Slide closure in accordance with claim 4, including an upward projection surrounding the orifice in the orifice plate and wherein the refractory felt means surrounds the upward projection.
Claim 7
Dependent Claim
17 words
Slide closure in accordance with claim 3, including copper-asbestos seal means between the housing and the container.
Claim 8
Dependent Claim
57 words
In a slide closure in accordance with claim 1, a plate assembly comprising a metal support frame having the refractory orifice plate mortared into the frame so that the support surfaces of the metal frame are parallel to the surface of the orifice plate which engages the slide plate and are separated therefrom by a predetermined distance.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |