US3853309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Components using cast-in cooling tubes
Assignee: Individual
•
Filing: 1974-02-28
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Granted: 1974-12-10
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Expires: 1994-02-28
Abstract
Abstract A casting intended for heat transference between the body of the casting and a fluid passing therethrough, for example, a tuyere or other water-cooled cooling element for a blast furnace, comprises a thin-walled flexible corrugated tube with metal cast round it. The surface area of the inside of the tube should be within the limits of about 1.75 to 5 times that of a cylindrical surface of the same diameter as the minimum diameter of the tube. Metals which may be used for the tube are stainless steel or cupro nickel and the metal cast round the tube may be a copper alloy, though the invention is not limited to these materials.
Inventors
- 👤 C Widmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:18
CPC Classifications
F; F28; F28F; F28F13/00; B; B22; B22D; B22D19/00; B22D19/0072; C; C21; C21B; C21B7/00; C21B7/10; C21B7/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
59 words
A casting intended for heat transference between the body of the casting and a fluid passing through a tube embedded therein during casting, the said tube being a thin walled flexible corrugated tube with an internal surface area between 1.75 and 5 times that of a cylindrical surface of the same diameter as the minimum diameter of the tube.
Claim 2
Dependent Claim
59 words
A casting intended for heat transference between the body of the casting and a fluid passing through a tube embedded therein during casting, the said tube being a thin walled flexible corrugated tube with an internal surface area between 1.75 and 5 times that of a cylindrical surface of the same diameter as the minimum diameter of the tube.
Claim 3
Dependent Claim
14 words
A casting according to claim 1, wherein the tube is made of stainless steel.
Claim 4
Dependent Claim
27 words
A casting according to claim 2, wherein the internal surface area is between 2 1/2 and 4 times that of a cylinder of the same minimum diameter.
Claim 5
Dependent Claim
16 words
A casting according to claim 2, wherein the wall thickness is not more than 0.03 inches.
Claim 6
Dependent Claim
51 words
A casting according to claim 2, wherein the corrugations occur at between 4 and 12 times per inch of axial length of tube, and have a depth of from 6 to 12 times the wall thickness of the tube, this depth being no greater than the minimum radius of the tube.
Claim 7
Dependent Claim
74 words
A copper or copper-based casting have cast therein a flexible, thin-walled, stainless steel tube for heat transference between a fluid to flow in the tube and the metal of the casting, the stainless steel tube being a corrugated tube with surface areas, for contact with the fluid and with the casting respectively, which are between 1.75 and 5 times that of a cylinder of the same diameter as the minimum diameter of the tube.
Claim 8
Dependent Claim
74 words
A copper or copper-based casting have cast therein a flexible, thin-walled, stainless steel tube for heat transference between a fluid to flow in the tube and the metal of the casting, the stainless steel tube being a corrugated tube with surface areas, for contact with the fluid and with the casting respectively, which are between 1.75 and 5 times that of a cylinder of the same diameter as the minimum diameter of the tube.
Claim 9
Dependent Claim
29 words
A casting according to claim 6 wherein the surface area is between 2 1/2 and 4 times that of a plain tube of the same minimum internal wall diameter.
Claim 10
Dependent Claim
23 words
A casting according to claim 6 wherein the corrugations occur at between 4 and 12 times per inch of axial length of tube.
Claim 11
Dependent Claim
24 words
A casting according to claim 6 wherein the corrugations have a depth of between 6 and 12 times the wall thickness of the tube.
Claim 12
Dependent Claim
23 words
A casting according to claim 6 wherein the corrugations have a depth which is not greater than the internal radius of the tube.
Claim 13
Dependent Claim
12 words
A casting according to claim 6 in the form of a bearing.
Claim 14
Dependent Claim
18 words
A casting according to claim 6 in the form of a water-cooled cooling element for a blast furnace.
Claim 15
Dependent Claim
24 words
A casting according to claim 6 in the form of a tuyere wherein the corrugated tube is cast into the nose of the tuyere.
References Cited (Backward Citations)
US258317A
Cited
US914520A
Cited
US2062391A
Cited
GB496289A
Cited
US2352206A
Cited
US3679194A
Cited
US3674248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |