US3980271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pouring of molten metals
Assignee: United States Steel Corp
•
Filing: 1975-01-09
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Granted: 1976-09-14
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Expires: 1995-01-09
Abstract
Abstract The sliding plate of a sliding gate valve has a mounting for a collector nozzle, and a nozzle is releasably coupled to the mounting by means of a releasable fastening which allows ready replacement of the nozzle when worn. The releasable fastening clamps the collector nozzle to its mounting and holds the nozzle in firm abutment with the underside of the sliding plate.
Inventors
- 👤 Robert Duncan Hind
- 👤 Jeffrey Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:36
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/28
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
99 words
A sliding plate for a sliding gate valve, comprising an apertured main upper refractory portion, an apertured nozzle mounting encasing said main portion and underlying the understood thereof, a collector nozzle tube which depends from said nozzle mounting, a metal sleeve encasing said nozzle tube and cemented thereto, and securing means fastening said metal sleeve and said nozzle mounting together such that an end of said nozzle tube is held in direct abuttment with the underside of said main portion, said securing means being releasable to allow said nozzle tube to be detached from said main portion for replacement.
Claim 2
Dependent Claim
99 words
A sliding plate for a sliding gate valve, comprising an apertured main upper refractory portion, an apertured nozzle mounting encasing said main portion and underlying the understood thereof, a collector nozzle tube which depends from said nozzle mounting, a metal sleeve encasing said nozzle tube and cemented thereto, and securing means fastening said metal sleeve and said nozzle mounting together such that an end of said nozzle tube is held in direct abuttment with the underside of said main portion, said securing means being releasable to allow said nozzle tube to be detached from said main portion for replacement.
Claim 3
Dependent Claim
24 words
A sliding main portion according to claim 1, wherein said nozzle mounting comprises an aperture metal reinforcing pan or tray secured to said plate.
Claim 4
Dependent Claim
16 words
A sliding plate according to claim 1, wherein said releasable securing means comprises screw-threaded connecting means.
Claim 5
Dependent Claim
26 words
A sliding plate according to claim 3, wherein said connecting means comprise two interfitting screw threads associated with said nozzle mounting and said nozzle sleeve respectively.
Claim 6
Dependent Claim
41 words
A sliding plate according to claim 4, wherein said two interfitting screw threads are defined by wavy surfaces formed in two shaped metal rings, one ring being fast with said nozzle mounting and the other ring fast with said nozzle sleeve.
Claim 7
Dependent Claim
24 words
A sliding plate according to claim 1, wherein said releasable fastening means comprises a clamp coupling between said nozzle mounting and said nozzle sleeve.
Claim 8
Dependent Claim
31 words
A sliding plate according to claim 6, wherein said coupling comprises an attachment ring secured to said nozzle mounting and a strap for compressing said attachment ring about said nozzle sleeve.
Claim 9
Dependent Claim
25 words
A sliding plate according to claim 7, wherein said attachment ring is welded to an encircling lip around the said aperture in the nozzle mounting.
Claim 10
Dependent Claim
23 words
A sliding plate according to claim 7, wherein said ring is slotted in an axial direction to allow the ring to give radially.
Claim 11
Dependent Claim
29 words
A sliding plate according to claim 7, wherein said attachment ring and said nozzle sleeve include means serving to locate said nozzle positively with respect to said main portion.
Claim 12
Dependent Claim
25 words
A sliding plate according to claim 10, wherein said locating means comprise an arrangement of interfitting projections and recesses upon said ring and said sleeve.
Claim 13
Dependent Claim
16 words
A sliding plate according to claim 1, wherein said releasable securing means comprises a bayonet coupling.
Claim 14
Dependent Claim
110 words
A sliding plate for a sliding gate valve, comprising an apertured main upper refractory position, an apertured nozzle mounting encasing said main portion and underlying the underside thereof, a collector nozzle tube which depends from said nozzle mounting, said nozzle mounting including a metal sleeve into which a collector nozzle tube is releasably cemented, and a releasable bayonet coupling to lock said nozzle tube to said metal sleeve, and hold an end of said nozzle tube in direct abutment with the underside of said main portion, whereby after releasing said bayonet coupling, it is possible to withdraw said nozzle tube from said sleeve for replacement by a new nozzle tube.
Claim 15
Dependent Claim
110 words
A sliding plate for a sliding gate valve, comprising an apertured main upper refractory position, an apertured nozzle mounting encasing said main portion and underlying the underside thereof, a collector nozzle tube which depends from said nozzle mounting, said nozzle mounting including a metal sleeve into which a collector nozzle tube is releasably cemented, and a releasable bayonet coupling to lock said nozzle tube to said metal sleeve, and hold an end of said nozzle tube in direct abutment with the underside of said main portion, whereby after releasing said bayonet coupling, it is possible to withdraw said nozzle tube from said sleeve for replacement by a new nozzle tube.
Claim 16
Dependent Claim
34 words
A sliding plate according to claim 13, wherein one half of the bayonet coupling comprises the metal sleeve and the other half of said coupling comprises a locking ring engageable with the nozzle tube.
Claim 17
Dependent Claim
29 words
A main portion according to claim 14, wherein the end of said nozzle tube remote from said sliding plate has a shoulder providing an abutment for said locking ring.
Claim 18
Dependent Claim
37 words
A sliding plate according to claim 13, wherein said bayonet coupling is adapted to urge said nozzle tube firmly against said main portion as said coupling is operated to secure the nozzle tube to said main portion.
Claim 19
Dependent Claim
42 words
A sliding plate according to claim 15, wherein said locking ring is provided with bayonet pins and the end of the said metal sleeve remote from said main portion is provided with a corresponding number of bayonet slots to receive said pins.
Claim 20
Dependent Claim
19 words
A sliding plate according to claim 15, wherein said locking ring has engagement means co-operable with a locking tool.
Claim 21
Dependent Claim
15 words
A sliding plate according to claim 18, wherein said engagement means comprises a castellated formation.
Claim 22
Dependent Claim
30 words
A sliding plate according to claim 1, wherein the underside of said main portion is underlain by an insulating refractory plate which forms an integral part of said sliding plate.
Claim 23
Dependent Claim
28 words
A sliding plate according to claim 1, wherein said end of the nozzle tube is stepped and the underside of said main portion is shaped to mate therewith.
Claim 24
Dependent Claim
33 words
A sliding plate according to claim 1, wherein the cement bond between said nozzle tube and said nozzle sleeve is frangible to allow the said tube to be detached from said metal sleeve.
Claim 25
Dependent Claim
13 words
A sliding gate valve including a sliding plate as claimed in claim 1.
Claim 26
Dependent Claim
19 words
A vessel such as a ladle or tundish having a sliding gate valve according to claim 23 fitted thereto.
Claim 27
Dependent Claim
65 words
A method of installing a nozzle tube in a sliding plate, the tube and plate being of a construction as defined in claim 13, said method comprising: applying a layer of frangible cement to the outer surface of said nozzle tube; inserting the cement covered tube into said metal sleeve; securing said bayonet coupling to lock said tube in said sleeve; and setting said cement.
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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) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |