System for accurately weighing solids and control mechanism for same
AssigneeE. I. Du Pont de Nemours and Company
InventorChristopher William Newton
Life of this patent
Estimating the term…
Abstract
A system, including a closed chamber (20) having a gas inlet (22) and a gas outlet (24) is shown and described. An inert gas supply under positive pressure is connected to the gas inlet, and a bubbler is connected to the gas outlet. The bubbler includes a compartment that is partially filled with liquid so as to define a head space, an inlet operatively connected to the gas outlet, a vent, and a vacuum line in fluid communication with the head space so that the head space has a negative pressure.
Claims16
An apparatus for regulating pressure in a closed system, comprising:
- a) a compartment partially filled with a liquid so as to define a head space above the liquid;
- b) a vacuum port in fluid communication with the head space, so that an environmental pressure of the head space is negative;
- c) a vent line for regulating pressure in the head space, the vent line adjustably extending into the liquid;
- d) a process line including a first end connected to the closed system, and an opposing second end adjustably extending into the liquid.
A system, comprising:
- b) an inert gas supply under positive pressure connected to a gas inlet;
- and c) a bubbler connected to a gas outlet, the bubbler including a compartment that is partially filled with liquid so as to define a head space, an inlet operatively connected to the gas outlet, a vent, and a vacuum line in fluid communication with the head space so that the head space has a negative pressure.
A process for regulating the pressure in a closed system by use of a regulating device, the device comprising:
- i) a compartment partially filled with a liquid so as to define a head space above the liquid;
- ii) a vacuum supply line in fluid communication with the head space;
- iii) a vent line including an end that adjustably extends into the liquid for regulating pressure within the head space;
- and second end adjustably extending into the liquid;
- the process comprising the steps of:
- a) applying a vacuum to the head space via the vacuum supply line;
- b) establishing a pressure in the head space by adjusting position of the vent line end disposed in the liquid;
- and c) establishing a pressure in the closed system by adjusting position of the process line second end disposed in the liquid;
- wherein the level of vacuum applied to the head space is sufficient to cause bubbles to form at the vent line end disposed in the liquid.
Dependencies are inferred from the claim text.