US4115235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for conveying a gas sample through an analyzer chamber
Assignee: Thermo Lab Instruments Inc
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Filing: 1976-11-08
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Granted: 1978-09-19
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Expires: 1996-11-08
Abstract
Abstract A gas analyzer is provided which is comprised of two gas sample flow loops joined at an angle to each other, one being an eductive loop that originates and returns to the chamber or conduit from which a gas sample is to be drawn and the other being a convective loop that joins in fluid flow communication with the eductive loop at a point upstream from its eductor device.
Inventors
- 👤 David M. Capone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:41
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/24; G01N33/00; G01N33/0004
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
107 words
Apparatus for sampling a gaseous fluid comprising, a first loop type conduit having an inlet leg and an outlet leg disposed in spaced, lateral relation to each other, an eductor device positioned at a location along the length of said loop conduit, a second loop type conduit having an inlet leg and an outlet leg joined to said first loop conduit at a location upstream of said eductor device, said second loop conduit inlet and outlet legs joined to said first loop conduit at substantially the same location along the length thereof, and an electrochemical cell sensing element in the flow path through said second loop conduit.
Claim 2
Dependent Claim
107 words
Apparatus for sampling a gaseous fluid comprising, a first loop type conduit having an inlet leg and an outlet leg disposed in spaced, lateral relation to each other, an eductor device positioned at a location along the length of said loop conduit, a second loop type conduit having an inlet leg and an outlet leg joined to said first loop conduit at a location upstream of said eductor device, said second loop conduit inlet and outlet legs joined to said first loop conduit at substantially the same location along the length thereof, and an electrochemical cell sensing element in the flow path through said second loop conduit.
Claim 3
Dependent Claim
22 words
Apparatus as in claim 1 wherein said second loop type conduit includes means for inducing convective flow of said gaseous fluid therethrough.
Claim 4
Dependent Claim
32 words
Apparatus as in claim 2 wherein said first loop type conduit is constructed and arranged to be mounted with the inlet leg and outleg leg substantially parallel for sampling said gaseous fluid.
Claim 5
Dependent Claim
20 words
Apparatus as in claim 2 which further includes means operatively associated with said apparatus to impart an oscillatory motion thereto.
Claim 6
Dependent Claim
16 words
Apparatus as in claim 4 wherein said means to impart said oscillatory motion includes pneumatic means.
Claim 7
Dependent Claim
26 words
Apparatus as in claim 4 which includes means to cause the sample flow in the eductive loop to increase and substantially coincide with the oscillatory motion.
Claim 8
Dependent Claim
21 words
Apparatus as in claim 6 in which flow increase is caused by increasing the flow of motive fluid to the eductor.
Claim 9
Dependent Claim
28 words
Apparatus as in claim 2 wherein said inlet and outlet legs of said second loop type conduit join said first loop type conduit through a common inlet-outlet conduit.
Claim 10
Dependent Claim
23 words
Apparatus as in claim 1 further including a junction block to join said second loop type conduit to said first loop type conduit.
Claim 11
Dependent Claim
20 words
Apparatus as in claim 9 further including heater means to heat said junction block and all conduit tubing connected thereto.
Claim 12
Dependent Claim
12 words
Apparatus as in claim 10 further including a cabinet enclosing said apparatus.
Claim 13
Dependent Claim
12 words
Apparatus as in claim 11 wherein said eductor device comprises an aspirator.
Claim 14
Dependent Claim
57 words
Apparatus as in claim 12 further including a valve operatively connected to said first loop type conduit and constructed and arranged to be placed in communication with a blow back fluid such that sample flow can be terminated and the blow back fluid selectively admitted to the upstream or downstream portions of said first loop type conduit.
Claim 15
Dependent Claim
25 words
Apparatus as in claim 1 wherein said second loop type conduit includes means for inducing convective flow therethrough and said eductor device comprises an aspirator.
Claim 16
Dependent Claim
21 words
Apparatus as in claim 14 further including means for heating said first loop type conduit and said second loop type conduit.
Claim 17
Dependent Claim
12 words
Apparatus as in claim 15 further including a cabinet enclosing said apparatus.
Claim 18
Dependent Claim
134 words
Apparatus for sampling a gaseous fluid comprising, a first loop type conduit having an inlet leg and an outlet leg disposed in spaced, lateral relation to each other, an eductor device positioned at a location along the length of said loop conduit, a second loop type conduit having an inlet leg and and outlet leg joined to said first loop conduit at a location upstream of said eductor device, an electrochemical cell sensing element in the flow path through said second loop conduit, and a valve operatively connected to said first loop type conduit and constructed and arranged to be placed in communication with a blow back fluid so that sample flow through said first loop type conduit can be terminated and the blow back fluid selectively admitted to said first loop type conduit.
Claim 19
Dependent Claim
134 words
Apparatus for sampling a gaseous fluid comprising, a first loop type conduit having an inlet leg and an outlet leg disposed in spaced, lateral relation to each other, an eductor device positioned at a location along the length of said loop conduit, a second loop type conduit having an inlet leg and and outlet leg joined to said first loop conduit at a location upstream of said eductor device, an electrochemical cell sensing element in the flow path through said second loop conduit, and a valve operatively connected to said first loop type conduit and constructed and arranged to be placed in communication with a blow back fluid so that sample flow through said first loop type conduit can be terminated and the blow back fluid selectively admitted to said first loop type conduit.
References Cited (Backward Citations)
USRE29209E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |