US3895915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas analyzing
Assignee: Megatech Corp USA
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Filing: 1973-08-16
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Granted: 1975-07-22
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Expires: 1993-08-16
Abstract
Abstract Exhaust gas from an internal combustion engine is analyzed to define volumetric percentages of selected component gases therein by an apparatus affording direct reading of such percentages and cooperating at high speed. The apparatus comprises float and tube flowmeters interspersed in a flow series with selective sorbents for the gas components to be measured. The tubes of the flowmeters are arranged in parallel alignment with each other and have scales therebetween to display said percentages directly.
Inventors
- 👤 Charles W Haldeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:58
CPC Classifications
G; G01; G01N; G01N30/00; G01M; G01M15/00; G01M15/04; G01M15/10; G01M15/102; G01M15/106
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
GAS ANALYZING APPARATUS COMPRISING, MEANS DEFINING A GAS FLOW SERIES ARRAY OF FLOWMETERS BETWEEN A GAS FLOW INLET AND A GAS FLOW OUTLET INTERSPERSED WITH MEANS FOR SELECTIVELY SORBING COMPONENTS GASES OF A GAS MIXTURE TO BE ANALYZED, MEANS DEFINING A GAS SAMPLING SYSTEM CONNECTED TO SAID GAS FLOW INLET FOR TAKING GAS SAMPLES AND COMPRISING MEANS FOR CONDENSING WATER VAPOR AND FOR DUMPING A PORTION OF THE GAS SAMPLED BEFORE ADMITTANCE OF THE BALANCE TO SAID GAS FLOW INLET, MEANS FOR DRIVING GAS THROUGH SAID ARRAY AND SELECTING FLOW RATE THEREOF AND PROPORTIONS OF SAMPLE GAS DUMPED AND SAMPLED GAS ADMITTED TO SAID GS FLOW INLET, AND MEANS FOR DISPLAYING DIRECTLY DIFFERENTIAL FLOW RATE BETWEEN AT LEAST TWO OF SAID FLOWMETERS INDICTIVE OF GAS SORBED IN THE COURSE OF PASSAGE OF A SAMPLE GAS MIXTURE BETWEEN SAID FLOWMETERS, AND WHEREIN SAID TWO FLOWMETERS ARE OF BALL AND TUBE TYPE AND ARE ARRANGED WITH THEIR TUBES IN PARALLEL AND SAID DISPLAY MEANS COMPRISE A COMMON SCALE BETWEEN SAID TUBES, AND FURTHER COMPRISING AN ADDITIONAL FLOWMETERS MEANS LOCATED WITHIN SAID APPARTUS FOR DEFINING A ZERO REFERENCE FOR SAID SCALE.
Claim 2
Dependent Claim
188 words
GAS ANALYZING APPARATUS COMPRISING, MEANS DEFINING A GAS FLOW SERIES ARRAY OF FLOWMETERS BETWEEN A GAS FLOW INLET AND A GAS FLOW OUTLET INTERSPERSED WITH MEANS FOR SELECTIVELY SORBING COMPONENTS GASES OF A GAS MIXTURE TO BE ANALYZED, MEANS DEFINING A GAS SAMPLING SYSTEM CONNECTED TO SAID GAS FLOW INLET FOR TAKING GAS SAMPLES AND COMPRISING MEANS FOR CONDENSING WATER VAPOR AND FOR DUMPING A PORTION OF THE GAS SAMPLED BEFORE ADMITTANCE OF THE BALANCE TO SAID GAS FLOW INLET, MEANS FOR DRIVING GAS THROUGH SAID ARRAY AND SELECTING FLOW RATE THEREOF AND PROPORTIONS OF SAMPLE GAS DUMPED AND SAMPLED GAS ADMITTED TO SAID GS FLOW INLET, AND MEANS FOR DISPLAYING DIRECTLY DIFFERENTIAL FLOW RATE BETWEEN AT LEAST TWO OF SAID FLOWMETERS INDICTIVE OF GAS SORBED IN THE COURSE OF PASSAGE OF A SAMPLE GAS MIXTURE BETWEEN SAID FLOWMETERS, AND WHEREIN SAID TWO FLOWMETERS ARE OF BALL AND TUBE TYPE AND ARE ARRANGED WITH THEIR TUBES IN PARALLEL AND SAID DISPLAY MEANS COMPRISE A COMMON SCALE BETWEEN SAID TUBES, AND FURTHER COMPRISING AN ADDITIONAL FLOWMETERS MEANS LOCATED WITHIN SAID APPARTUS FOR DEFINING A ZERO REFERENCE FOR SAID SCALE.
Claim 3
Dependent Claim
36 words
Gas analyzing apparatus in accordance with claim 1, wherein the sorbing means comprise sorbents for carbon dioxide, oxygen and carbon monoxide, each of said sorbents being preceded and followed in the flow series by a flowmeter.
Claim 4
Dependent Claim
49 words
Gas analyzing apparatus in accordance with claim 2 and further comprising a combustion device with fuel and oxidant feed means in combination therewith, the exhaust of the combustion device being coupled to said gas sampling system, and means for measuring flow of fuel and oxidant to said combustion device.
Claim 5
Dependent Claim
28 words
Gas analyzing apparatus in accordance with claim 1 and further comprising means for isolating said flow series array from gas flow surges at the inlet and/or outlet thereof.
Claim 6
Dependent Claim
28 words
Gas analyzing apparatus in accordance with claim 1 wherein said scale is calibrated to expand from one flowmeter to the other in proportion to expected pressure differential therebetween.
Claim 7
Dependent Claim
32 words
Gas analyzing apparatus in accordance with claim 1 wherein said means defining a zero reference comprise a first flowmeter in said series upstream of all dry gas sorbing means in said series.
Claim 8
Dependent Claim
26 words
Gas analyzing apparatus in accordance with claim 6 wherein said parallel tubes are adjustable relAtive to the scale therebetween to calibrate the apparatus for absolute reading.
Claim 9
Dependent Claim
27 words
Gas analyzing apparatus in accordance with claim 7 wherein more than two of said tubes are provided in interspersed array with more than one of said scales.
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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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |