US3597386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory heat insulating sleeve
Assignee: Ametek Inc
•
Filing: 1968-04-25
•
Granted: 1971-08-03
•
Expires: 1988-04-25
Abstract
Abstract Sleeves for thermally insulating the molten head metal in casting risers and ingot moulds are described in which the sleeve is formed incompletely, and has a gap running from top to bottom thereof. The sleeve may thus be sprung into place by closing the gap, inserting the sleeve and releasing it, so that it holds itself in position.
Inventors
- 👤 Leon De Brabander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:09
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08G; C08G8/00; C08G8/04; C08G8/06; C08G8/08; C08L71/00; C08L71/08; C08L71/14; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/18; C08L23/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
12 words
The combination of claim 1 wherein the sleeve is cylindrical when unstressed.
Claim 2
Dependent Claim
20 words
The combination of claim 1 wherein the gap in the sleeve is substantially parallel to the axis of the sleeve.
Claim 3
Dependent Claim
18 words
The combination of claim 1 wherein the sleeve contains at least one peripheral spring to enhance its resilience.
Claim 4
Dependent Claim
29 words
The combination of claim 1 wherein the sleeve is made of a composition comprising fibrous organic material, granular refractory material, a binder therefor and optionally containing fibrous refractory material.
Claim 5
Dependent Claim
32 words
The combination of claim 1 wherein the sleeve consists of an inner layer of the defined composition and optionally containing fibrous refractory material, and an outer layer of bonded inorganic fibrous material.
Claim 6
Dependent Claim
16 words
The combination of claim 6 wherein the bonded inorganic fibrous material is bonded calcium aluminosilicate fibers.
Claim 7
Dependent Claim
17 words
The combination of claim 1 wherein the sleeve is in the shape of an open-ended hollow cylinder.
Claim 8
Dependent Claim
15 words
The combination of claim 1 wherein the sleeve is in the shape of a prism.
Claim 9
Dependent Claim
17 words
The combination of claim 1 wherein the sleeve is in the shape of an open-ended small-angle frustocone.
References Cited (Backward Citations)
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Cited
US2027638A
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US2261289A
Cited
US2652270A
Cited
US3262669A
Cited
US3405028A
Cited
US3362677A
Cited
US3394913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |