DIFFERENTIAL PRESSURE FILLING SYSTEM AND METHOD FOR A DOSING VESSEL
First Claim
1. A dosing vessel comprising:
- a. a reservoir having an inlet and an outlet, said reservoir configured to contain a supply of a cryogenic liquid with a headspace above and said outlet configured to be connected to a dosing arm having a dosing head;
b. a low pressure sensor configured to detect a vapor pressure in the headspace of the reservoir;
c. a high pressure sensor configured to detect a pressure in a bottom portion of the reservoir;
d. an inlet valve in fluid communication with the inlet of the reservoir and configured to be placed in communication with a source of cryogenic liquid; and
e. a controller in communication with the high and low pressure sensors and the inlet valve, said controller configured to store a preset liquid level or a preset differential pressure corresponding to the preset liquid level and to determine a measured differential pressure based on data from the high and low pressure sensors and to control the inlet valve based on the measured differential pressure and the preset liquid level or the preset differential pressure so that a liquid level of a cryogenic liquid stored in the reservoir is generally maintained at the preset liquid level.
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Accused Products
Abstract
A dosing vessel includes a reservoir having an inlet and an outlet and is configured to contain a supply of a cryogenic liquid with a headspace above. The outlet is configured to be connected to a dosing arm having a dosing head. A low pressure sensor is configured to detect a vapor pressure in the headspace. A high pressure sensor is configured to detect a pressure in a bottom portion of the reservoir. An inlet valve is in fluid communication with the inlet of the reservoir and is placed in communication with a source of cryogenic liquid. A controller is in communication with the high and low pressure sensors and the inlet valve and is configured to store a preset liquid level or a preset differential pressure corresponding to the preset liquid level, to determine a measured differential pressure based on data from the high and low pressure sensors and to control the inlet valve based on the measured differential pressure and the preset liquid level or the preset differential pressure so that a liquid level of a cryogenic liquid stored in the reservoir is generally maintained at the preset liquid level.
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Citations
20 Claims
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1. A dosing vessel comprising:
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a. a reservoir having an inlet and an outlet, said reservoir configured to contain a supply of a cryogenic liquid with a headspace above and said outlet configured to be connected to a dosing arm having a dosing head; b. a low pressure sensor configured to detect a vapor pressure in the headspace of the reservoir; c. a high pressure sensor configured to detect a pressure in a bottom portion of the reservoir; d. an inlet valve in fluid communication with the inlet of the reservoir and configured to be placed in communication with a source of cryogenic liquid; and e. a controller in communication with the high and low pressure sensors and the inlet valve, said controller configured to store a preset liquid level or a preset differential pressure corresponding to the preset liquid level and to determine a measured differential pressure based on data from the high and low pressure sensors and to control the inlet valve based on the measured differential pressure and the preset liquid level or the preset differential pressure so that a liquid level of a cryogenic liquid stored in the reservoir is generally maintained at the preset liquid level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for controlling filling of a vessel with a cryogenic liquid comprising:
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a. a low pressure sensor configured to detect a vapor pressure in a headspace of the vessel; b. a high pressure sensor configured to detect a pressure in a bottom portion of the vessel; c. an inlet valve configured for fluid communication between the vessel and a source of cryogenic liquid; and d. a controller in communication with the high and low pressure sensors and the inlet valve, said controller configured to store a preset liquid level or a preset differential pressure corresponding to the preset liquid level and to determine a measured differential pressure based on data from the high and low pressure sensors and to control the inlet valve based on a the measured differential pressure and the preset liquid level or the preset differential pressure so that a liquid level of a cryogenic liquid stored in the vessel is generally maintained at the preset liquid level. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for controlling filling of vessel using an inlet valve that is in fluid communication with a source of cryogenic liquid comprising the steps of:
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a. storing a preset liquid level or a preset differential pressure corresponding to the preset liquid level b. measuring a low pressure in a headspace of the vessel; c. measuring a high pressure in a bottom portion of the vessel; d. subtracting the low pressure from the high pressure to determine a measured differential pressure; and e. controlling the inlet valve based on the measured differential pressure and the preset liquid level or the preset differential pressure so that a liquid level of a cryogenic liquid stored in the vessel is generally maintained at the preset liquid level. - View Dependent Claims (18, 19, 20)
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Specification