Patent US4056217A successfully refreshed from Google Patents.
US4056217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding gate valve for molten metal with adjustable plates
Assignee: NUOVA SANAC SpA AN ITALIAN CORP
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Filing: 1975-12-05
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Granted: 1977-11-01
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Expires: 1995-12-05
Abstract
Abstract A box discharger for a large size container of liquid metal, can be mounted on the container and dismounted therefrom, by a single operator, with the aid of tiltable mounting means for mounting frames of stationary and slidable refractory plates on the container. The plates are held to the frames by a set-screw structure.
Inventors
- 👤 Giovanni Aliprandi
- 👤 Roberto Ricci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:41
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
245 words
A device for discharging smelted metal from a container, comprising; a first discharger plate unit, secured in use to a container comprising a first and stationary metal frame and a first and stationary refractory plate normally supported thereby and having a discharge hole; first mounting means for tiltably mounting the first plate unit on the container; a second discharger plate unit comprising a second metal frame and a second refractory plate normally supported thereby and having a discharge hole; second mounting means for mounting the second unit for sliding movement of the second plate along and in contact with the first and stationary plate to mutually align the holes in an opening step of the sliding movement and to place the holes out of mutual alignment in a closing step thereof, the mounting means comprising a third, normally stationary metal frame secured to the container and having elongate mutually parallel guides, the second frame having edges slidable along the parallel guides, the second mounting means also comprising means for tiltably mounting the third frame and thereby the guides and the second frame on the container; and first and second plate mounting means, each comprising a plurality of set screws threaded into a respective frame, engageable and disengageable with the respective refractory plate, sides of the respective frame sliding integrally with the respective refractory plate and having leaf springs and positioning listels co-operating with said screws to press them against edges of the respective refractory plate.
Claim 2
Independent Claim
245 words
A device for discharging smelted metal from a container, comprising; a first discharger plate unit, secured in use to a container comprising a first and stationary metal frame and a first and stationary refractory plate normally supported thereby and having a discharge hole; first mounting means for tiltably mounting the first plate unit on the container; a second discharger plate unit comprising a second metal frame and a second refractory plate normally supported thereby and having a discharge hole; second mounting means for mounting the second unit for sliding movement of the second plate along and in contact with the first and stationary plate to mutually align the holes in an opening step of the sliding movement and to place the holes out of mutual alignment in a closing step thereof, the mounting means comprising a third, normally stationary metal frame secured to the container and having elongate mutually parallel guides, the second frame having edges slidable along the parallel guides, the second mounting means also comprising means for tiltably mounting the third frame and thereby the guides and the second frame on the container; and first and second plate mounting means, each comprising a plurality of set screws threaded into a respective frame, engageable and disengageable with the respective refractory plate, sides of the respective frame sliding integrally with the respective refractory plate and having leaf springs and positioning listels co-operating with said screws to press them against edges of the respective refractory plate.
Claim 3
Dependent Claim
46 words
A device according to claim 1 in which the first mounting means also includes a plurality of studs secured to the container and engageable with the first metal frame, and nuts threadedly engageable with the studs to releasably hold the first metal frame against the container.
Claim 4
Dependent Claim
56 words
A device according to claim 1, wherein the means for tiltably mounting the third metal frame comprises a pivot secured to the container, the third frame also having, opposite the pivot, a projection secured to the container and having a vertical slot, and a supporting pin engageable with the slot to support the third metal frame.
Claim 5
Dependent Claim
34 words
A device according to claim 3, wherein said second mounting means also includes a plurality of studs secured to the container, and nuts threadedly engageable with the studs to additionally support the third frame.
Claim 6
Dependent Claim
33 words
A device according to claim 4 wherein each nut has a washer which has a spherical contact surface, the third frame having matching contact surfaces for engagement with the nuts through the washers.
Claim 7
Dependent Claim
19 words
A device according to claim 5 wherein each stud is tiltably secured to the container to facilitate said engagement.
Claim 8
Dependent Claim
16 words
A device according to claim 1, wherein said first and second refractory plates are mutually interchangeable.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |