System For Accurately Weighing Solids and Control Mechanism For Same
First Claim
Patent Images
1. A system for accurately weighing a mass of material, comprising:
- a) a closed chamber including a chamber gas inlet and a gas outlet;
b) an inert gas supply under positive pressure connected to the gas inlet;
c) a scale disposed in the closed chamber; and
d) a vacuum powered pressure regulator operatively connected to the gas outlet to maintain a predetermined pressure level within the closed chamber and to substantially inhibit pressure fluctuations within the closed chamber.
3 Assignments
0 Petitions
Accused Products
Abstract
A system for accurately weighing a mass of material, including a closed chamber (20) having a gas inlet (22) and a gas outlet (24). A scale (30) is disposed in the closed chamber (20). An inert gas supply, under positive pressure, is connected to the gas inlet (22) and a vacuum powered pressure regulator (100) is connected to the gas outlet (24) to maintain a predetermined pressure level within the closed chamber (20) and to substantially inhibit pressure fluctuations within the chamber (20) that may affect accuracy of the scale (30).
-
Citations
18 Claims
-
1. A system for accurately weighing a mass of material, comprising:
-
a) a closed chamber including a chamber gas inlet and a gas outlet; b) an inert gas supply under positive pressure connected to the gas inlet; c) a scale disposed in the closed chamber; and d) a vacuum powered pressure regulator operatively connected to the gas outlet to maintain a predetermined pressure level within the closed chamber and to substantially inhibit pressure fluctuations within the closed chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A process for accurately weighing and dispensing a mass of material, comprising the steps of:
-
i) providing a closed chamber including a scale disposed therein and a receptacle operatively connected to the scale; ii) adding a mass of material to the receptacle from a material supply line that is disposed above and physically unconnected from the receptacle; iii) controlling pressure within the closed chamber through operation of a vacuum powered pressure regulator connected to the closed chamber; and iv) dispensing the mass of material from the receptacle via a dispensing conduit disposed below and physically unconnected from the receptacle. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A process for accurately weighing a mass of material, comprising the steps of:
-
i) providing a closed chamber including a scale disposed therein and a receptacle operatively connected to the scale; ii) continuously sweeping the closed chamber by introducing an inert gas under positive pressure into the closed chamber through a gas inlet; iii) continuously exhausting the inert gas from the closed chamber through a gas outlet; and iv) controlling a pressure level within the closed chamber, when continuously exhausting the inert gas, to within about 0.125 kPa. - View Dependent Claims (16, 17, 18)
-
Specification