IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0024161
(2001-12-18)
|
발명자
/ 주소 |
|
대리인 / 주소 |
Weins, Michael J.Semprebon, Jeffrey E.
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
6 |
초록
▼
The volume measuring device has a reservoir of known volume attached to a measuring tube. The measuring tube is also attached to a container mount configured to sealably engage a container. Liquid partially fills the measuring tube and the volume of liquid contained therein can be measured by measur
The volume measuring device has a reservoir of known volume attached to a measuring tube. The measuring tube is also attached to a container mount configured to sealably engage a container. Liquid partially fills the measuring tube and the volume of liquid contained therein can be measured by measuring its height. The measuring tube pivots between two measuring orientations. In the first measuring orientation, the volume of liquid in the measuring tube equals the total volume of liquid minus the volume of the reservoir. In the second measuring orientation, the volume of liquid in the measuring tube equals the total volume minus the volume of the container. Thus, the difference in the volume of liquid contained in the measuring tube in the two orientations equals the difference between the known volume of the reservoir and the unknown volume of the container, and the volume of the container can be calculated.
대표청구항
▼
The volume measuring device has a reservoir of known volume attached to a measuring tube. The measuring tube is also attached to a container mount configured to sealably engage a container. Liquid partially fills the measuring tube and the volume of liquid contained therein can be measured by measur
The volume measuring device has a reservoir of known volume attached to a measuring tube. The measuring tube is also attached to a container mount configured to sealably engage a container. Liquid partially fills the measuring tube and the volume of liquid contained therein can be measured by measuring its height. The measuring tube pivots between two measuring orientations. In the first measuring orientation, the volume of liquid in the measuring tube equals the total volume of liquid minus the volume of the reservoir. In the second measuring orientation, the volume of liquid in the measuring tube equals the total volume minus the volume of the container. Thus, the difference in the volume of liquid contained in the measuring tube in the two orientations equals the difference between the known volume of the reservoir and the unknown volume of the container, and the volume of the container can be calculated. flow path and exit the gas outlet so long as sample gas flows into the sample gas inlet at said elevated pressure, said first and second sample gas flow paths each including a restricted orifice sized to prevent a build up of excessive pressure in the scrubber when the valve is in the second position. 7. An instrument for analyzing a gas that is at a variable pressure elevated above atmospheric pressure, said gas flowing through the instrument to exit the instrument via a gas outlet at atmospheric pressure, said instrument comprising a block having a sample gas inlet including an orifice and a calibration gas inlet including an orifice, a detection cell mounted to the block past which the gas being analyzed flows, a valve mounted to the block, said valve having a closed position, a sample gas position, and a calibration gas position, a scrubber attached to the block that removes unwanted substances from the sample gas, a first passageway extending from the calibration gas inlet orifice through the valve and past the detection cell to the gas outlet, circumventing the scrubber, a second passageway extending from the sample gas inlet orifice through the scrubber and the valve and past the detection cell to the gas outlet, a third passageway in communication with the second passageway at a junction between the scrubber and the sample gas inlet orifice, said third passageway extending from said junction to the gas outlet, circumventing the scrubber, valve and cell and enabling at least a portion of the sample gas to flow through the third passageway and exit the gas outlet so long as sample gas flows into the sample gas inlet orifice at said elevated pressure, a bypass orifice positioned along the third passageway, said sample gas orifice and bypass orifice being sized to maintain the pressure within the scrubber when the valve is in the closed position or the calibration gas position at a reduced pressure substantially below the elevated pressure of the gas being analyzed. 8. The instrument of claim 7 where the gas introduced through either the sample gas inlet orifice or the calibration gas orifice is within the range from 1 to 100 pounds per square inch gage, and the orifices are sized so that the flow rate of gas through the instrument is within a predetermined range from 0.5 to 7 standard cubic feet per hour. 9. The instrument of claim 8 where the orifices have an area from 0.00001 to 0.0005 square inch. 10. The instrument of claim 7 where the bypass orifice has a predetermined size that is substantially greater than the predetermined size of the sample gas inlet orifice. 11. The instrument of claim 10 where the bypass orifice and sample gas inlet orifice each have a predetermined area, and the area of the bypass orifice is at least two times greater than the area of the sample gas orifice. 12. The instrument of claim 7 where the bypass orifice has a predetermined size that is substantially less than the predetermined size of the sample gas inlet orifice. 13. The instrument of claim 12 the valve is sealed and mounted within a cavity in the side of the block, said valve having a rotary member that is manually rotated between a closed position, a sample gas position, and a calibration gas position. 14. The instrument of claim 7 where the scrubber is detachably connected to the block upstream of the detection cell and down stream of the sample gas inlet orifice and comprises a see-through container holding a removable scrubber material that removes unwanted substances and changes color to indicate that said scrubber material is exhausted and needs replacement. 15. The instrument of claim 7 including a filter between the valve and the scrubber. 16. The instrument of claim 7 including a flow meter through which gas flows. 17. The instrument of claim 7 including a heater mounted to the block. 18. The instrument of claim 17 including a thermistor mounted to the block that is a component of a control circuit for compensating for the variation in cell output with temperature. 19. An instrument for analyzing a gas including a block having a sample gas inlet, a calibration gas inlet, and a gas outlet, a detection cell mounted to the block past which the gas being analyzed flows, a valve mounted to the block, said valve having a closed position, a sample gas position, and a calibration gas position, a first passageway in the block extending from the calibration gas inlet through the valve and past the detection cell to the gas outlet, a second passageway in the block extending from the sample gas inlet through the valve and past the detection cell to the gas outlet, a calibration gas orifice along the first passageway upstream of the valve and detection cell, a sample gas orifice along the second passageway upstream of the valve, said sample gas orifice having a predetermined size, and a third passageway in the block, including a bypass orifice downstream of the sample gas orifice, said third passageway in communication with the gas outlet while sample gas is being introduced through the sample gas inlet when the valve is in the sample gas position, enabling at least a portion of the sample gas to flow through the third passageway and exit the gas outlet, said bypass orifice having a predetermined size that is substantially greater than the predetermined size of the sample gas orifice. 20. The instrument of claim 19 where the bypass orifice and sample gas orifice each have a predetermined area, and the area of the bypass orifice is at least two times greater than the area of the sample gas orifice. 21. The instrument of claim 19 including a scrubber attached to the block that removes from the sample gas unwanted substances. 22. The instrument of claim 21 where the scrubber is upstream of the detection cell and down stream of the sample gas orifice and comprises a see-through container holding scrubber material that removes gas unwanted substances and changes color to indicate that said scrubber material is exhausted and needs replacement. 23. The instrument of claim 22 where the container is mounted to be detached from the block to provide access to the scrubber material to replace exhausted scrubber material. 24. The instrument of claim 19 including a flow meter through which gas flows. 25. The instrument of claim 19 including a filter between the valve and the scrubber. 26. The instrument of claim 19 including a heater mounted to the block. 27. The instrument of claim 26 including a thermistor mounted to the block that is a component of a control circuit that compensates for the variation in cell output with temperature. 28. An instrument for analyzing a gas including a block having a sample gas inlet, a calibration gas inlet, and a gas outlet, a detection cell seated within a cavity in the block past which the gas being analyzed flows, a scrubber detachably connected to the block including a see-through container adapted to hold scrubber material that removes unwanted substances, said scrubber material changing colors to indicate replacement of exhausted scrubber material, a valve mounted to the block, said valve having a closed position, a sample gas position, and a calibration gas position, a first passageway in the block that bypasses the scrubber and extends from the calibration gas inlet through the valve and the detection cell to the gas outlet, a second passageway in the block having a first branch extending from the sample gas inlet through the block to a first outlet and a second branch in the block extending from a first inlet through the valve and the detection cell to the gas outlet, said scrubber being connected between the first outlet and the first inlet to enable the sample gas to flow through the scrubber prior to flowing through the valve and past the detection cell, a sample gas orifice along the first branch of the second passageway upstream of the first outlet, a third passageway placing sampl
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