Patent US4392387A successfully refreshed from Google Patents.
US4392387A
Expired / Lapsed
US
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Sampling device for analyzing gas with high dust content
Assignee: NGK Insulators Ltd
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Filing: 1981-04-14
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Granted: 1983-07-12
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Expires: 2001-04-14
Abstract
Abstract The disclosed sampling device has a gas suction tube through which gas with a high content of dust is sucked into the sampling device so as to cleanse the gas with water in the sampling device before analyzing the gas. At least one air nozzle is provided in the gas suction tube in such a manner that the air nozzle faces the inside surface of the gas suction tube wall and is directed toward the inlet opening of the gas suction tube, so that dust and other deposits sedimented on the inside surface of the gas suction tube is cleansed by air jets ejected from the air nozzle.
Inventors
- 👤 Naoe Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:50
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
A sampling device for analyzing gas with a high dust content, comprising a generally closed housing (2), a gas suction tube (3) of a large diameter connected to an upper portion of the housing so as to lead the gas with the high dust content into the inside of the housing, an air-jet nozzle (4) disposed in said gas suction tube (3) in the proximity of joint between said tube (3) and said housing (2), said nozzle (4) facing tube wall (6) of said gas suction tube (3) and being directed toward inlet opening (5) thereof, a water supply conduit (7) connected to a top portion of said housing (2) so as to supply water for washing the gas with the high dust content led into the housing (2), a screen (9) disposed at a lower portion of said housing (2), a water sump (11) connected to a bottom portion of said housing (2) through a pipe (10), and a washed-gas passage (12) having one end thereof connected to said pipe (10) and an opposite end thereof communicated with outside of the sampling device.
Claim 2
Dependent Claim
184 words
A sampling device for analyzing gas with a high dust content, comprising a generally closed housing (2), a gas suction tube (3) of a large diameter connected to an upper portion of the housing so as to lead the gas with the high dust content into the inside of the housing, an air-jet nozzle (4) disposed in said gas suction tube (3) in the proximity of joint between said tube (3) and said housing (2), said nozzle (4) facing tube wall (6) of said gas suction tube (3) and being directed toward inlet opening (5) thereof, a water supply conduit (7) connected to a top portion of said housing (2) so as to supply water for washing the gas with the high dust content led into the housing (2), a screen (9) disposed at a lower portion of said housing (2), a water sump (11) connected to a bottom portion of said housing (2) through a pipe (10), and a washed-gas passage (12) having one end thereof connected to said pipe (10) and an opposite end thereof communicated with outside of the sampling device.
Claim 3
Dependent Claim
43 words
A sampling device as set forth in claim 1, wherein said sampling device further comprises an atomizer nozzle (8) secured to lower end of said water supply conduit (7) so as to supply atomized water particles into the inside of the housing (2).
Claim 4
Dependent Claim
42 words
A sampling device as set forth in claim 1, wherein said sampling device further comprises a visor disposed at joint between said pipe (10) and said washed-gas passage (12) so as to prevent the water from entering into said washed-gas passage (12).
Claim 5
Dependent Claim
32 words
A sampling device as set forth in claim 1, wherein said sampling device comprises a plurality of said air-jet nozzles (4) disposed along inner circumferential surface of said gas suction tube (3).
Claim 6
Dependent Claim
40 words
A sampling device as set forth in claim 1, wherein said air-jet nozzle (4) is adapted to eject an air jet at an angle of 15 to 30 degrees relative to longitudinal axial direction of said gas suction tube (3).
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |