US3894419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture analyzer calibrator
Assignee: Gulf Research and Development Co
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Filing: 1974-06-19
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Granted: 1975-07-15
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Expires: 1994-06-19
Abstract
Abstract Apparatus and a method for calibration of moisture analyzers including means to pass separate streams of a dry gas and a wet gas into a mixer. The wet gas stream is passed through a saturator maintained at a constant temperature to maintain a constant vapor pressure of moisture in the wet stream. Each of the dry gas and the wet gas is passed through a flow restrictor that makes the flow rate of each of the gas streams depend on the pressure differential through the restrictors. A first pressure regulating valve maintains a constant pressure at the inlets of the two flow restrictors and a second pressure regulating valve maintains a constant pressure at the outlet of the mixer.
Inventors
- 👤 Richard T Mator
- 👤 Thomas J Puzniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0006; G01N25/00; G01N25/56; G01N1/00; G01N1/28; G01N2001/2893
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
93 words
A method of preparing a gas of known moisture content comprising regulating the pressure on a dry gas, flowing dry gas at the regulated pressure into a flow restrictor, discharging the dry gas from the flow restrictor and delivering said gas into a mixer, delivering a stream of dry gas at the regulated pressure to a saturator maintained at a constant temperature to form a wet gas, passing the wet gas from the saturator through a flow restrictor and into the mixer, and maintaining a constant pressure on the gas in the mixer.
Claim 2
Independent Claim
93 words
A method of preparing a gas of known moisture content comprising regulating the pressure on a dry gas, flowing dry gas at the regulated pressure into a flow restrictor, discharging the dry gas from the flow restrictor and delivering said gas into a mixer, delivering a stream of dry gas at the regulated pressure to a saturator maintained at a constant temperature to form a wet gas, passing the wet gas from the saturator through a flow restrictor and into the mixer, and maintaining a constant pressure on the gas in the mixer.
Claim 3
Dependent Claim
32 words
A method as set forth in claim 1 including the step of controlling the moisture content of the gas in the mixer by control of the regulated pressure on the dry gas.
Claim 4
Dependent Claim
19 words
A method as set forth in claim 1 in which the temperature of the saturator is approximately 32* F.
Claim 5
Dependent Claim
22 words
A method as set forth in claim 3 including the step of maintaining the temperature of both restrictors at approximately 32* F.
Claim 6
Independent Claim
175 words
A method of preparing a mixture of a first gas having a desired concentration of a fluid therein comprising regulating the pressure on the first gas to maintain a constant pressure, flowing the first gas at the regulated constant pressure into a first flow restrictor, delivering the first gas discharged from the first flow restrictor into a mixer, flowing a stream of the first gas at the regulated constant pressure into a saturator maintained at a constant temperature at which the fluid is liquid under the regulated constant pressure, said saturator having therein the fluid in the liquid state whereby the first gas passing therethrough is substantially saturated with the fluid in the gaseous state, flowing a mixture of the first gas and the fluid in the gaseous state from the saturator through a second flow restrictor and into the mixer, maintaining a constant pressure on the gas in the mixer, and changing the regulated pressure on the first gas to adjust the concentration of the fluid in the first gas to the desired concentration.
Claim 7
Independent Claim
175 words
A method of preparing a mixture of a first gas having a desired concentration of a fluid therein comprising regulating the pressure on the first gas to maintain a constant pressure, flowing the first gas at the regulated constant pressure into a first flow restrictor, delivering the first gas discharged from the first flow restrictor into a mixer, flowing a stream of the first gas at the regulated constant pressure into a saturator maintained at a constant temperature at which the fluid is liquid under the regulated constant pressure, said saturator having therein the fluid in the liquid state whereby the first gas passing therethrough is substantially saturated with the fluid in the gaseous state, flowing a mixture of the first gas and the fluid in the gaseous state from the saturator through a second flow restrictor and into the mixer, maintaining a constant pressure on the gas in the mixer, and changing the regulated pressure on the first gas to adjust the concentration of the fluid in the first gas to the desired concentration.
Claim 8
Dependent Claim
152 words
Apparatus for preparing a gas of known moisture content comprising means for supplying a dry gas, pressure regulating means for maintaining a constant inlet pressure on the dry gas, dry gas flow restricting means, gas mixing means, conduit means for delivering dry gas from the pressure regulating means to the flow restricting means and from the flow restricting means to the mixing means, saturating means, means for delivering dry gas from the dry gas pressure regulating means into the saturating means to form a wet gas, wet gas flow restrictor means, wet gas conduit means adapted to deliver wet gas from the saturating means to the wet gas restrictor means and from the wet gas restrictor means to the mixing means, temperature control means adapted to maintain the saturating means at a constant temperature, and second pressure regulating means adapted to maintain a constant pressure on the gas in the mixing means.
Claim 9
Dependent Claim
152 words
Apparatus for preparing a gas of known moisture content comprising means for supplying a dry gas, pressure regulating means for maintaining a constant inlet pressure on the dry gas, dry gas flow restricting means, gas mixing means, conduit means for delivering dry gas from the pressure regulating means to the flow restricting means and from the flow restricting means to the mixing means, saturating means, means for delivering dry gas from the dry gas pressure regulating means into the saturating means to form a wet gas, wet gas flow restrictor means, wet gas conduit means adapted to deliver wet gas from the saturating means to the wet gas restrictor means and from the wet gas restrictor means to the mixing means, temperature control means adapted to maintain the saturating means at a constant temperature, and second pressure regulating means adapted to maintain a constant pressure on the gas in the mixing means.
Claim 10
Dependent Claim
28 words
Apparatus as set forth in claim 6 in which the dry gas flow restricting means and the wet gas flow restricting means are elongated sections of capillary tubing.
Claim 11
Dependent Claim
40 words
Apparatus as set forth in claim 6 in which the dry gas flow restricting means and the wet gas flow restricting means are elongated sections of capillary stainless steel tubing having an opening therethrough of approximately 0.01 inch in diameter.
Claim 12
Dependent Claim
17 words
Apparatus as set forth in claim 6 in which the temperature control means is an ice bath.
Claim 13
Dependent Claim
28 words
Apparatus as set forth in claim 9 in which the dry gas flow restricting means and the wet gas flow restricting means are submerged in the ice bath.
Claim 14
Dependent Claim
55 words
Apparatus as set forth in claim 6 in which the first pressure regulating means is a pressure regulating valve in the conduit and controls the pressure to the dry gas flow restricting means and the saturator whereby said pressure can be changed to change the moisture content of the gas discharged from the mixing means.
Claim 15
Dependent Claim
32 words
Apparatus as set forth in claim 6 in which the saturator is a water-soaked sponge supported between the inlet and the outlet of the saturator to direct dry gas through the sponge.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |