Patent US3259564A successfully refreshed from Google Patents.
Patent US3877675A successfully refreshed from Google Patents.
US3877675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal construction and method of forming seal between two abutting surfaces
Assignee: Individual
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Filing: 1974-02-13
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Granted: 1975-04-15
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Expires: 1994-02-13
Abstract
Abstract A seal construction and method of forming a seal between two abutting surfaces which are to be heated to relatively high temperatures. The seal is particularly useful in a sliding gate valve mechanism, which controls flow of liquid metal from a bottom pour vessel, to prevent metal from leaking between the nozzle block of the vessel and the top plate of the mechanism. The seal comprises an annular mortar-filled tube of a material which excludes air but chars or burns away at the temperature encountered. The tube is placed in a groove between the two surfaces. The mortar sets before the material of the tube burns away completely and hence does not bond to either surface.
Inventors
- 👤 James T Shapland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:27
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/50; B22D41/502; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S277/933; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1812
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
The combination, with two members which have abutting surfaces and are adapted to be heated to a relatively high temperature, at least one of said members having an annular groove in its surface, of an improved seal construction comprising an annular mortar-filled tube within said groove, the mortar of which is capable of setting at the temperature to which said members are heated, the material of said tube excluding air from the mortar therein, but being capable of charring or burning away at said temperature after the mortar sets.
Claim 2
Dependent Claim
89 words
The combination, with two members which have abutting surfaces and are adapted to be heated to a relatively high temperature, at least one of said members having an annular groove in its surface, of an improved seal construction comprising an annular mortar-filled tube within said groove, the mortar of which is capable of setting at the temperature to which said members are heated, the material of said tube excluding air from the mortar therein, but being capable of charring or burning away at said temperature after the mortar sets.
Claim 3
Dependent Claim
33 words
A combination as defined in claim 1 in which one of said members is a nozzle block of a bottom-pour vessel, and the other is a top plate of a slidable gate mechanism.
Claim 4
Dependent Claim
17 words
A combination as defined in claim 2 in which said groove is formed in said top plate.
Claim 5
Dependent Claim
20 words
A combination as defined in claim 2 in which both said nozzle block and said top plate have mating grooves.
Claim 6
Independent Claim
69 words
A method of forming a seal between two abutting surfaces, at least one of which has an annular groove, said method comprising filling an annular tube with mortar, placing said tube in said groove, and heating said tube to a temperature at which the mortar sets and the material of the tube chars or burns away, but remains long enough to prevent the mortar from bonding to said surfaces.
Claim 7
Independent Claim
69 words
A method of forming a seal between two abutting surfaces, at least one of which has an annular groove, said method comprising filling an annular tube with mortar, placing said tube in said groove, and heating said tube to a temperature at which the mortar sets and the material of the tube chars or burns away, but remains long enough to prevent the mortar from bonding to said surfaces.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |