US4079622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the smoke density of flue gases of gas and fuel oil
Assignee: SnamProgetti SpA
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Filing: 1976-09-10
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Granted: 1978-03-21
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Expires: 1996-09-10
Abstract
Abstract Apparatus for determining the smoke density of flue gas by providing substantially uniform smoke spots, which includes a piston-actuated pump for withdrawing gas from a smokestack through a cooled probe so that cooled gas from the stack is drawn through filter paper and is then cooled further for the removal of condensate. The cooled, dried gas then flows from the system during the compression stroke of the piston of the suction pump through a by-pass provided with a one-way value. The present invention provides the uniformity required to facilitate optical comparison between the obtained spots in the described filter paper and standard reference spots.
Inventors
- 👤 Raul Cocola
- 👤 Leandro Borgacci
- 👤 Arnaldo Gambini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:27
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N1/2258; G01N1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
Apparatus for determining the smoke density of flue gas by providing substantially uniform smoke spots on filter paper which comprises the combination, with a smokestack, of a probe having its inner and extending orthogonally into the smokestack, a cooling jacket surrounding the outer end of said probe and having an inlet and an outlet for the circulation of cooling fluid, a piston-actuated suction pump, a gas passageway connecting the pump with the probe, an enclosed filter having means for holding filter paper transversely across said passageway adjacent the outer end of said probe and upon which is deposited a substantially uniform smoke spot to facilitate optical comparison between said spot and standard spots used for purposes of comparison, cooling means surrounding said passageway between said filter and said pump, a drier extending across said passageway between the cooling means and the pump, and a one-way valve associated with said pump and adapted to permit gas to flow from the pump during the compression stroke of said piston.
Claim 2
Dependent Claim
167 words
Apparatus for determining the smoke density of flue gas by providing substantially uniform smoke spots on filter paper which comprises the combination, with a smokestack, of a probe having its inner and extending orthogonally into the smokestack, a cooling jacket surrounding the outer end of said probe and having an inlet and an outlet for the circulation of cooling fluid, a piston-actuated suction pump, a gas passageway connecting the pump with the probe, an enclosed filter having means for holding filter paper transversely across said passageway adjacent the outer end of said probe and upon which is deposited a substantially uniform smoke spot to facilitate optical comparison between said spot and standard spots used for purposes of comparison, cooling means surrounding said passageway between said filter and said pump, a drier extending across said passageway between the cooling means and the pump, and a one-way valve associated with said pump and adapted to permit gas to flow from the pump during the compression stroke of said piston.
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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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |