Patent US4428245A successfully refreshed from Google Patents.
US4428245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sampling molten metal
Assignee: Nippon Steel Nisshin Co Ltd
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Filing: 1982-03-26
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Granted: 1984-01-31
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Expires: 2002-03-26
Abstract
Abstract A vacuum sampling container of a refractory material which comprises a small diameter cylindrical section and a large diameter cylindrical section coaxially connected in mutual communication and is evacuated and sealed, the free end of said small diameter cylindrical section being provided with a portion thinned to the extent that it is broken by virtue of the heat and pressure of the molten metal when the vacuum sampling container is immersed in a molten metal is disclosed. Also a sampler comprising said vacuum sampling container and a protective tube therefor is disclosed.
Inventors
- 👤 Hajime Nakamura
- 👤 Junichi Iwamura
- 👤 Yoshio Nakajima
- 👤 Masaji Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:58
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/14; G01N1/1409
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
63 words
A vacuum sampling container which comprises a small diameter cylindrical section and a large diameter cylindrical section coaxially connected in mutual communication and evacuated and sealed, the free end of said small diameter cylindrical section being provided with a portion thinned to the extent that it is broken when the vacuum sampling container is immersed in a molten metal, said container being quartz.
Claim 2
Dependent Claim
63 words
A vacuum sampling container which comprises a small diameter cylindrical section and a large diameter cylindrical section coaxially connected in mutual communication and evacuated and sealed, the free end of said small diameter cylindrical section being provided with a portion thinned to the extent that it is broken when the vacuum sampling container is immersed in a molten metal, said container being quartz.
Claim 3
Dependent Claim
39 words
The vacuum sampling container as claimed in claim 1, which further comprises a second small diameter cylindrical section provided coaxially in communication on the opposite side of the large diameter cylindrical section to the first small diameter cylindrical section.
Claim 4
Dependent Claim
25 words
The vacuum sampling container as claimed in claim 1 or 2, wherein the first small diameter cylindrical section is bent approximately at a right angle.
Claim 5
Dependent Claim
24 words
The vacuum sampling container as claimed in claim 1 or 2, wherein the first small diameter cylindrical section is bent at an obtuse angle.
Claim 6
Dependent Claim
16 words
The vacuum sampling container as claimed in claim 3, wherein a deoxidizing agent is inserted beforehand.
Claim 7
Dependent Claim
16 words
The vacuum sampling container as claimed in claim 4, wherein a deoxidizing agent is inserted beforehand.
Claim 8
Dependent Claim
21 words
The vacuum sampling container as claimed in claim 5, wherein the deoxidizing agent is a wire, coil or foil of aluminum.
Claim 9
Dependent Claim
21 words
The vacuum sampling container as claimed in claim 6, wherein the deoxidizing agent is a wire, coil or foil of aluminum.
Claim 10
Dependent Claim
138 words
A sampler for molten metal comprising a vacuum sampling container comprising a first small diameter cylindrical section and a large diameter cylindrical section connected coaxially in mutual communication and evacuated and sealed, the free end of said first small diameter cylindrical section being provided with a portion thinned to the extent that it is broken by virtue of the heat and pressure of the molten metal when the vacuum sampling container is immersed in a molten metal, said container being quartz; a protective tube housing said vacuum sampling container and having an opening at the end thereof corresponding to the free end of said vacuum sampling container; and a connecting means secured to said vacuum sampling container which connects the integral body of said vacuum sampling container and the protective tube to a supporting rod for the sampler.
Claim 11
Dependent Claim
138 words
A sampler for molten metal comprising a vacuum sampling container comprising a first small diameter cylindrical section and a large diameter cylindrical section connected coaxially in mutual communication and evacuated and sealed, the free end of said first small diameter cylindrical section being provided with a portion thinned to the extent that it is broken by virtue of the heat and pressure of the molten metal when the vacuum sampling container is immersed in a molten metal, said container being quartz; a protective tube housing said vacuum sampling container and having an opening at the end thereof corresponding to the free end of said vacuum sampling container; and a connecting means secured to said vacuum sampling container which connects the integral body of said vacuum sampling container and the protective tube to a supporting rod for the sampler.
Claim 12
Dependent Claim
51 words
The sampler as claimed in claim 9, wherein the protective tube comprises a first tube protecting the small diameter cylindrical section of the vacuum sampling container and a second tube protecting the large diameter cylindrical section of the vacuum sampling container, said first tube being telescopically engaged with the second tube.
Claim 13
Dependent Claim
18 words
The sampler as claimed in claim 9 or 10, wherein the protective tube is made of convoluted paper.
Claim 14
Dependent Claim
50 words
The sampler as claimed in claim 9 or 10, wherein the vacuum sampling container is provided with a second small diameter cylindrical section provided on the large diameter cylindrical section on the opposite side of the first diameter small cylindrical section coaxially in communication with the large diameter cylindrical section.
References Cited (Backward Citations)
US2970350A
Cited
US3315529A
Cited
US3369406A
Cited
US3859857A
Cited
US4007640A
Cited
US4170139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |