Patent US5326973A successfully refreshed from Google Patents.
US5326973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for gas analysis
Assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
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Filing: 1992-12-31
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Granted: 1994-07-05
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Expires: 2012-12-31
Abstract
Abstract A device for gas analysis, which determines the content of two or more gases in a gas flow. The device includes at least one source for emission of two or more ray paths of radiation of a detectable wavelength, a cuvette device having an inlet and an outlet for uninterrupted gas flow, and a detector device for conversion of the radiation into an electrical signal. The source(s), cuvettes, and detectors are arranged such that ray paths emitted from the source pass through cuvettes containing gas and to detectors to permit analysis of two or more gases in a gas flow. In a preferred embodiment, the cuvette device includes a block having cuvettes positioned in each of the ray paths, which cuvettes are interconnected to form an unbroken conduit for gas flow from inlet to outlet.
Inventors
- 👤 Anders Eckerbom
- 👤 Carl Hamilton
- 👤 Robert Zyzanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:50
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/05; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/3504
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
200 words
A device for analyzing at least two gases in a gas flow comprising: cuvette means having an inlet, an outlet and an unbroken gas flow conduit between the inlet and the outlet, the cuvette means including a cuvette block containing at least two cuvettes, which at least two cuvettes are interconnected end to end by channels to form the unbroken as flow conduit, and further including first and second cuvette windows, which cuvette windows are transparent to radiation, radiation source means for emitting at least two parallel and spaced apart ray paths of detectable wavelength radiation; filter means for transmitting radiation of a specific wavelength; and detector means comprising at least two detectors for converting the radiation into an electrical signal, wherein said first cuvette window is positioned between the radiation source means and the at least two cuvettes, and said second cuvette window is positioned between the at least two cuvettes and the at least two detectors; and wherein the at least two cuvettes and at least two detectors are positioned relative to the ray paths so that the radiation in each ray path passes through a cuvette to a corresponding detector for analysis of gas in the cuvette.
Claim 2
Independent Claim
200 words
A device for analyzing at least two gases in a gas flow comprising: cuvette means having an inlet, an outlet and an unbroken gas flow conduit between the inlet and the outlet, the cuvette means including a cuvette block containing at least two cuvettes, which at least two cuvettes are interconnected end to end by channels to form the unbroken as flow conduit, and further including first and second cuvette windows, which cuvette windows are transparent to radiation, radiation source means for emitting at least two parallel and spaced apart ray paths of detectable wavelength radiation; filter means for transmitting radiation of a specific wavelength; and detector means comprising at least two detectors for converting the radiation into an electrical signal, wherein said first cuvette window is positioned between the radiation source means and the at least two cuvettes, and said second cuvette window is positioned between the at least two cuvettes and the at least two detectors; and wherein the at least two cuvettes and at least two detectors are positioned relative to the ray paths so that the radiation in each ray path passes through a cuvette to a corresponding detector for analysis of gas in the cuvette.
Claim 3
Dependent Claim
19 words
The device of claim 1, wherein the connecting channels are substantially perpendicular to the direction of the ray paths.
Claim 4
Dependent Claim
38 words
The device of claim 1, wherein the connecting channels are formed between the cuvette block and one of the cuvette windows by grooves in the surface of the cuvette block and covered with one of the cuvette windows.
Claim 5
Dependent Claim
32 words
The device of claim 1, wherein the at least two cuvettes are arranged around a central axis in the cuvette block, which axis is parallel to the direction of the ray paths.
Claim 6
Dependent Claim
27 words
The device of claim 4, wherein the central axis is co-axial with the rotational axis of a cutter wing, which cutter wing intermittently breaks the ray paths.
Claim 7
Independent Claim
121 words
A device for analyzing at least two gases in a gas flow comprising: cuvette means having an inlet, an outlet and an unbroken gas flow conduit between the inlet and the outlet, the cuvette means including at least two cuvettes for containing gas flowing through the conduit; radiation source means for emitting at least two non-intersecting ray paths of detectable wavelength radiation; and detector means comprising at least two detectors for converting the radiation into an electrical signal, the at least two cuvettes and at least two detectors being positioned relative to the at least two ray paths so that the radiation in each ray path passes through a cuvette to a corresponding detector for analysis of gas in the cuvette.
Claim 8
Independent Claim
121 words
A device for analyzing at least two gases in a gas flow comprising: cuvette means having an inlet, an outlet and an unbroken gas flow conduit between the inlet and the outlet, the cuvette means including at least two cuvettes for containing gas flowing through the conduit; radiation source means for emitting at least two non-intersecting ray paths of detectable wavelength radiation; and detector means comprising at least two detectors for converting the radiation into an electrical signal, the at least two cuvettes and at least two detectors being positioned relative to the at least two ray paths so that the radiation in each ray path passes through a cuvette to a corresponding detector for analysis of gas in the cuvette.
Claim 9
Dependent Claim
16 words
The device of claim 6, wherein the number of cuvettes is four or a multiple thereof.
Claim 10
Dependent Claim
14 words
The device of claim 6, wherein the at least two detectors are pyro-electric detectors.
Claim 11
Dependent Claim
22 words
The device of claim 6, wherein the detector means comprises a temperature-controlled plate on which the at least two detectors are attached.
Claim 12
Dependent Claim
26 words
The device of claim 6, further comprising a signal processing means wherein the signals are adaptively filtered by software based on the appearance of the signal.
Claim 13
Dependent Claim
16 words
The device of claim 6, further comprising filter means for transmitting radiation of a specific wavelength.
Claim 14
Dependent Claim
17 words
The device of claim 11, wherein the filter means is attached to the at least two detectors.
Claim 15
Dependent Claim
57 words
The device of claim 6, wherein said cuvette means further includes first and second cuvette windows, which cuvette windows are transparent to the radiation, said first cuvette window positioned between the radiation source and the at least two cuvettes, and said second cuvette windows positioned between the at least two cuvettes, and the at least two detectors.
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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) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |