US3877309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion sampler for molten material
Assignee: Individual
•
Filing: 1974-05-06
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Granted: 1975-04-15
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Expires: 1994-05-06
Abstract
Abstract An immersion molten material sampling device of a type usable to obtain a sample of molten steel from a furnace. The device includes a sectional mold structure having a vented sample receiving cavity and an entrance passage for molten material to flow into said sample receiving cavity. The entrance passage is characterized by the inclusion of a venturi which minimizes resistance to flow and effects smoother flow of molten material into the sample receiving cavity. The venturi throat which is surrounded by thick wall structure of the mold acts as a thermal valve to prevent loss of sample from the sample receiving cavity by maximizing heat removal from the molten material through heat conduction to the thick wall structure of the mold surrounding the throat. The resulting high heat conduction away from the molten material at the venturi throat, once the molten material has stopped flowing into the sample cavity, causes the material in the throat to freeze first thus trapping the sample inside the sample cavity to prevent loss of molten material therefrom during removal of the device from a bath of molten material. The body of the sampler is preferably of the split mold type with a gasket of porous material between the mold halves to provide more uniform venting for the sample receiving cavity.
Inventors
- 👤 Richard J Hance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:29
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/12; G01N1/125; G01N1/14; G01N2001/1418; G01N2001/1436; Y; Y10; Y10S; Y10S73/00; Y10S73/09
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
133 words
An immersion sampler device for obtaining a sample from a molten bath, said sampler including a mold structure having wall portions defining: a sample cavity having a configuration to produce a casting of the desired shape, means for venting said cavity, and a flow passage for filling said cavity, and the improvement wherein said wall portions define a flow passage having an entrance in an end face at the immersion end of said mold structure and a venturi which minimizes resistance to flow and effects smoother flow of molten material to said cavity and a thicker wall portion in the region of the venturi throat serving to extract heat from the molten material in a manner to effect freezing of molten material in said throat to prevent loss of sample from said cavity.
Claim 2
Dependent Claim
133 words
An immersion sampler device for obtaining a sample from a molten bath, said sampler including a mold structure having wall portions defining: a sample cavity having a configuration to produce a casting of the desired shape, means for venting said cavity, and a flow passage for filling said cavity, and the improvement wherein said wall portions define a flow passage having an entrance in an end face at the immersion end of said mold structure and a venturi which minimizes resistance to flow and effects smoother flow of molten material to said cavity and a thicker wall portion in the region of the venturi throat serving to extract heat from the molten material in a manner to effect freezing of molten material in said throat to prevent loss of sample from said cavity.
Claim 3
Dependent Claim
134 words
An immersion sampler device for obtaining a sample from a bath of molten material, said sampler including a split mold body of the type having a pair of mating half sections each including recessed areas which when said sections are held together form a sample cavity, a vent, and a passage for filling said mold, the recessed areas of each half section which together form said passage for filling being of a configuration to form a venturi and said mating half sections being formed so as to provide thicker wall portions in the region of the throat of said venturi for extraction of heat from the molten material in said throat to prevent loss of sample from said sample cavity, and a gasket made of a porous material disposed between said mating half sections.
Claim 4
Dependent Claim
134 words
An immersion sampler device for obtaining a sample from a bath of molten material, said sampler including a split mold body of the type having a pair of mating half sections each including recessed areas which when said sections are held together form a sample cavity, a vent, and a passage for filling said mold, the recessed areas of each half section which together form said passage for filling being of a configuration to form a venturi and said mating half sections being formed so as to provide thicker wall portions in the region of the throat of said venturi for extraction of heat from the molten material in said throat to prevent loss of sample from said sample cavity, and a gasket made of a porous material disposed between said mating half sections.
Claim 5
Dependent Claim
147 words
An immersion sampler device comprising a holder made of material suitable for immersion into a bath of molten material, said holder supporting a mold at an end thereof to be immersed, said mold being comprised of body structure having wall portions defining therein a cavity for producing a cast sample of a desired shape, means to vent said cavity, and a fill passage for said mold constructed and arranged so that molten material enters said mold from the immersion end of said mold, said wall portions defining said fill passage including portions defining a venturi with the wall portions surrounding the throat of said venturi being substantially thicker than other of said wall portions and serving to extract heat from the molten material in a manner to effect freezing of molten material in said throat to prevent loss of sample from the immersion end of said mold.
Claim 6
Dependent Claim
147 words
An immersion sampler device comprising a holder made of material suitable for immersion into a bath of molten material, said holder supporting a mold at an end thereof to be immersed, said mold being comprised of body structure having wall portions defining therein a cavity for producing a cast sample of a desired shape, means to vent said cavity, and a fill passage for said mold constructed and arranged so that molten material enters said mold from the immersion end of said mold, said wall portions defining said fill passage including portions defining a venturi with the wall portions surrounding the throat of said venturi being substantially thicker than other of said wall portions and serving to extract heat from the molten material in a manner to effect freezing of molten material in said throat to prevent loss of sample from the immersion end of said mold.
Claim 7
Dependent Claim
20 words
A sampler device according to claim 3 including a quantity of a deoxidizing material at one end of said venturi.
Claim 8
Dependent Claim
24 words
A sampler device according to claim 3 wherein said body structure includes mating sections with a gasket of porous material between said mating sections.
Claim 9
Dependent Claim
21 words
A sampler device according to claim 3 including a closure of heat destructible material covering the entrance to said fill passage.
Claim 10
Dependent Claim
26 words
A sampler device according to claim 3 wherein said holder comprises a tube of heat resistant material with said mold supported in an immersion end thereof.
Claim 11
Dependent Claim
30 words
A sampler device according to claim 3 wherein said fill passage has an entrance in a plane substantially perpendicular to the longitudinal axis of said immersion end of said tube.
Claim 12
Dependent Claim
150 words
An immersion sampler of the type including a cardboard tube immersible into a bath of molten material and a split mold supported in the immersion end of said tube, said mold being of a refractory material defining an entrance passage for molten material, a sample cavity, and a vent passage for venting fluid displaced by said molten material, the improvement comprising recessed portions of the material of said mold forming a venturi in said entrance passage which is constructed and arranged to receive molten material at the immersion end of said mold and provide smooth inward flow of molten material to said sample cavity and to have thicker wall portions of refractory material in the region of said venturi throat to effect freezing of molten material in the throat of said venturi to prevent loss of sample from said cavity when said sampler has been immersed for obtaining a sample.
Claim 13
Dependent Claim
150 words
An immersion sampler of the type including a cardboard tube immersible into a bath of molten material and a split mold supported in the immersion end of said tube, said mold being of a refractory material defining an entrance passage for molten material, a sample cavity, and a vent passage for venting fluid displaced by said molten material, the improvement comprising recessed portions of the material of said mold forming a venturi in said entrance passage which is constructed and arranged to receive molten material at the immersion end of said mold and provide smooth inward flow of molten material to said sample cavity and to have thicker wall portions of refractory material in the region of said venturi throat to effect freezing of molten material in the throat of said venturi to prevent loss of sample from said cavity when said sampler has been immersed for obtaining a sample.
Claim 14
Dependent Claim
43 words
An immersion sampler of the type comprised of complementary mold sections providing an entrance passage and a sample receiving cavity and the improvement wherein gasket structure of a porous material is disposed between mold sections to provide venting for said sample receiving cavity.
Claim 15
Dependent Claim
43 words
An immersion sampler of the type comprised of complementary mold sections providing an entrance passage and a sample receiving cavity and the improvement wherein gasket structure of a porous material is disposed between mold sections to provide venting for said sample receiving cavity.
References Cited (Backward Citations)
US3646816A
Cited
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 |