US3759087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling apparatus for analyzing gas
Assignee: Nippon Steel Corp
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Filing: 1971-04-08
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Granted: 1973-09-18
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Expires: 1991-04-08
Abstract
Abstract A gas sampling apparatus, which is a high temperature dry sampling apparatus, which makes it possible to carry out quickly and accurately a stabilized analysis of dust-rich, high temperature and high humidity gas generated from a gas generating source, such as, for example, a shaft furnace, converter, openhearth furnace and the like, comprising, as a typical example, a ceramic filter fitted to the tip of a gas outlet pipe provided within a cooling cylinder, a mechanism for blowing gas for removing dust, said mechanism being set near the filter and a thermal expansion absorbing mechanism installed in the gas outlet pipe.
Inventors
- 👤 N Iwao
- 👤 A Ezaki
- 👤 S Hayashi
- 👤 N Nakano
- 👤 T Morita
- 👤 Y Nakamori
- 👤 K Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:21
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N1/2226; G01N2001/2235; G01N2001/227
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A sampling apparatus for analyzing gases, comprising a hollow cylindrical ceramic filter, an annular cooling cylinder having an annular end surface at a free end thereof against which one end of the ceramic filter is engaged, a gas removal means concentric with said ceramic filter and extending through said annular cooling cylinder for collecting gas passing through said ceramic filter and carrying it away from said filter, a thermal expansion compensating means comprising a filter engaging member engaging the other end of said filter and extending through said annular cooling cylinder and spring means acting on said filter engaging member and urging said filter engaging member against said filter to urge said filter into engagement with said annular end surface of said cooling cylinder, and compressed gas supply means in said apparatus directing a flow of compressed gas along the cylindrical surface of said ceramic filter on the opposite side of said filter from said gas removal means.
Claim 2
Dependent Claim
158 words
A sampling apparatus for analyzing gases, comprising a hollow cylindrical ceramic filter, an annular cooling cylinder having an annular end surface at a free end thereof against which one end of the ceramic filter is engaged, a gas removal means concentric with said ceramic filter and extending through said annular cooling cylinder for collecting gas passing through said ceramic filter and carrying it away from said filter, a thermal expansion compensating means comprising a filter engaging member engaging the other end of said filter and extending through said annular cooling cylinder and spring means acting on said filter engaging member and urging said filter engaging member against said filter to urge said filter into engagement with said annular end surface of said cooling cylinder, and compressed gas supply means in said apparatus directing a flow of compressed gas along the cylindrical surface of said ceramic filter on the opposite side of said filter from said gas removal means.
Claim 3
Dependent Claim
98 words
A sampling apparatus as claimed in claim 1 in which said annular cooling cylinder extends around said annular filter and said annular surface faces away from the free end of said cooling cylinder, and said filter engaging means is an annular rod extending through said cooling cylinder having the end thereof engaged with said filter, and said spring means urges said rod toward the free end of said annular cylinder, and said gas removal means comprises an annular chamber around said ceramic filter and a gas outlet pipe extending from said annular chamber through said annular cooling cylinder.
Claim 4
Dependent Claim
81 words
A sampling apparatus as claimed in claim 2 in which the inside surface of said rod is in substantial alignment with the inside of said ceramic filter, and said gas supply means includes a chamber around the end of said rod remote from said ceramic filter and a compressed gas inlet to said chamber, whereby compressed gas admitted to said chamber through said inlet is passed along said annular rod for blowing dust off the inside surface of said ceramic filter.
Claim 5
Dependent Claim
52 words
A sampling apparatus as claimed in claim 3 further comprising a mechanical wiper means within said annular rod and reciprocally movable within said ceramic filter, and wiper moving means connected to said wiper meAns for reciprocally moving said wiper means for mechanically wiping dust from the internal surface of said ceramic filter.
Claim 6
Dependent Claim
144 words
A sampling apparatus as claimed in claim 1 in which said annular surface on said annular cooling cylinder is on the free end of said annular cooling cylinder facing outward of the free end and said hollow cylindrical ceramic filter projects beyond said annular cooling cylinder, and said filter engaging means is a member engaging the free end of said ceramic filter and a rod extending through said ceramic filter and said annular cooling cylinder on the end of which said member engaging the ceramic filter is mounted, the other end of said rod being engaged by said spring means for urging said rod in the direction of said other end and said member against said ceramic filter and said ceramic filter against said annular surface, said rod being hollow and having holes therein within said ceramic filter and constituting said gas removal means.
Claim 7
Dependent Claim
89 words
A sampling apparatus as claimed in claim 5 in which said compressed gas supply means comprises a compressed gas chamber around the free end of said annular cooling cylinder adjacent the end of said ceramic filter which is against said annular surface, a compressed gas inlet to said chamber, and said chamber having outlets directed toward the exterior surface of said ceramic filter, whereby compressed gas admitted to said chamber through said inlet is passed along said ceramic filter for blowing dust off the outside of said ceramic filter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |