US4170139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling device for analysis of molten metal for hydrogen
Assignee: Kobe Steel Ltd
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Filing: 1978-05-03
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Granted: 1979-10-09
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Expires: 1998-05-03
Abstract
Abstract A sampling device for a quantitative determination of hydrogen in molten metal, which includes a material in which hydrogen is relatively non-diffusible during testing or readily soluble during sampling and a refractory vessel housing this material. This refractory vessel is sealed so as to maintain a vacuum or negative (reduced) pressure therein, and is provided with a thin-walled aspirating portion which is readily destroyed by an external pressure.
Inventors
- 👤 Kiichi Narita
- 👤 Hiroshi Hara
- 👤 Masayuki Taniguchi
- 👤 Masaru Yamaguchi
- 👤 Iwao Matumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:49
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/14; G01N1/1409
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
A sampling device for a determination of hydrogen in molten metal which comprises a refractory containment member having a thin-walled portion comparatively prepared to be destroyed by an external force and a material in which hydrogen is relatively non-diffusible or readily soluble, said material being housed in said refractory containment member and either a vacuum or a reduced pressure being maintained with said containment member.
Claim 2
Dependent Claim
65 words
A sampling device for a determination of hydrogen in molten metal which comprises a refractory containment member having a thin-walled portion comparatively prepared to be destroyed by an external force and a material in which hydrogen is relatively non-diffusible or readily soluble, said material being housed in said refractory containment member and either a vacuum or a reduced pressure being maintained with said containment member.
Claim 3
Dependent Claim
58 words
A sampling device according to claim 1 wherein a tubular member composed of a metallic material capable of alloying with a molten metal to be sampled is inserted and disposed in said refractory containment member with the provision for a clearance between the outer wall of said tubular member and the inner wall of said refractory containment member.
Claim 4
Dependent Claim
62 words
A sampling device according to claim 1 wherein said refractory member comprises quartz and a tubular member of austenite stainless steel is disposed within said refractory containment member with a substantial vacuum being established with said containment member and said thin-walled portion comparatively prepared to be destroyed by an external force being located at a forward end of said refractory containment member.
Claim 5
Dependent Claim
21 words
A sampling device according to claim 1 wherein said refractory containment member has a curved portion at a forward end thereof.
Claim 6
Dependent Claim
21 words
A sampling device according to claim 2 wherein said refractory containment member has a curved portion at a forward end thereof.
Claim 7
Dependent Claim
43 words
A sampling device according to claim 2 wherein said refractory containment member is provided, contiguous with its inner wall, with a plurality of projections extending toward the axis thereof to maintain a clearance between said refractory containment member and said alloying metal member.
Claim 8
Dependent Claim
17 words
A sampling device according to claim 6 wherein said alloying metal member comprises a tube of titanium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |