IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0473063
(2012-05-16)
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등록번호 |
US-8955370
(2015-02-17)
|
발명자
/ 주소 |
- Thornberg, Steven M.
- Brown, Jason
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
13 |
초록
▼
A method of detecting leaks and measuring volumes as well as a device, the Power-free Pump Module (PPM), provides a self-contained leak test and volume measurement apparatus that requires no external sources of electrical power during leak testing or volume measurement. The PPM is a portable, pneuma
A method of detecting leaks and measuring volumes as well as a device, the Power-free Pump Module (PPM), provides a self-contained leak test and volume measurement apparatus that requires no external sources of electrical power during leak testing or volume measurement. The PPM is a portable, pneumatically-controlled instrument capable of generating a vacuum, calibrating volumes, and performing quantitative leak tests on a closed test system or device, all without the use of alternating current (AC) power. Capabilities include the ability is to provide a modest vacuum (less than 10 Torr) using a venturi pump, perform a pressure rise leak test, measure the gas's absolute pressure, and perform volume measurements. All operations are performed through a simple rotary control valve which controls pneumatically-operated manifold valves.
대표청구항
▼
1. A device for detection of gas leakage, comprising: a compressed gas source;a venturi vacuum pump;a vacuum manifold fluidically connected separately to the compressed gas source, the venturi vacuum pump, and a device under test;a control valve for controlling fluid flow through the manifold from t
1. A device for detection of gas leakage, comprising: a compressed gas source;a venturi vacuum pump;a vacuum manifold fluidically connected separately to the compressed gas source, the venturi vacuum pump, and a device under test;a control valve for controlling fluid flow through the manifold from the device under test to either the compressed gas source or the venturi vacuum pump;a differential pressure gauge for measuring the pressure differential between the manifold and the device under test as a function of time;an absolute pressure gauge for measuring the absolute pressure in the manifold; anda standard container with a known volume fluidically connected to the manifold for determining the volume of the device under test. 2. The device of claim 1, wherein the venturi vacuum pump can evacuate the manifold to an absolute pressure of less than approximately 10 Torr and greater than approximately 1 Torr. 3. The device of claim 1, wherein the control valve comprises a multi-port pneumatic valve. 4. The device of claim 1, wherein the vacuum manifold comprises multiple apertures for making fluidic connections to the compressed gas source, the venturi vacuum pump, and the device under test; and wherein each fluidic connection comprises a pneumatic valve controlled by the control valve. 5. The device of claim 1, wherein the compressed gas source comprises compressed air. 6. The device of claim 1, wherein the pressure gauge comprises a digital gauge powered by a non alternating-current power source. 7. The device of claim 1, wherein the pressure gauge comprises a non-powered analog gauge. 8. A method for detection of gas leakage, comprising: providing a device for detection of gas leakage, the device comprising: a compressed gas source;a venturi vacuum pump;a vacuum manifold fluidically connected separately to the compressed gas source, the venturi vacuum pump, and a device under test;a control valve for controlling fluid flow through the manifold from the device under test to either the compressed gas source or the venturi vacuum pump; anda differential pressure gauge for measuring the pressure differential between the manifold and the device under test as a function of time, wherein the differential pressure gauge comprises two sides in which one side is fluidically connected to the manifold and the other side is fluidically connected to the device under test;connecting the venturi vacuum pump to the device under test through the manifold with the control valve, thereby evacuating the device under test and the manifold to a low vacuum;disconnecting the venturi vacuum pump from the manifold;disconnecting the device under test from the manifold; andmeasuring the pressure differential between the manifold and the device under test with the differential pressure gauge as a function of time. 9. The method of claim 8, further comprising at least one evacuate-backfill step, each evacuate-backfill step comprising: connecting the manifold to the compressed gas source after the step of disconnecting the venturi vacuum pump from the manifold, thereby backfilling the manifold and the device under test with compressed gas from the compressed gas source;disconnecting the manifold from the compressed gas source;connecting the manifold to the venturi vacuum pump, thereby evacuating the device under test and the manifold to a low vacuum; anddisconnecting the venturi vacuum pump from the manifold. 10. The method of claim 8, wherein the low vacuum is an absolute pressure of less than approximately 10 Torr and greater than approximately 1 Torr. 11. The method of claim 8, further comprising determining the absolute leak rate of the device under test from the pressure differential as a function of time and the volume of the device under test. 12. The method of claim 11, wherein the device for detection of gas leakage further comprises a standard container with a known volume fluidically connected to the manifold for determining the volume of the device under test and the method further comprises determining the volume of the device under test using the known volume of the standard container. 13. The method of claim 8, wherein the device for detection of gas leakage further comprises an absolute pressure gauge for measuring the absolute pressure of the low vacuum in the manifold. 14. The method of claim 8, wherein the control valve comprises a multi-port pneumatic valve. 15. The method of claim 8, wherein the vacuum manifold comprises multiple apertures for making fluidic connections to the compressed gas source, the venturi vacuum pump, and the device under test; and wherein each fluidic connection comprises a pneumatic valve controlled by the control valve. 16. The method of claim 8, wherein the compressed gas source comprises compressed air. 17. The method of claim 8, wherein the pressure gauge comprises a digital gauge powered by a non alternating-current power source. 18. The method of claim 8, wherein the pressure gauge comprises a non-powered analog gauge.
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