Fluent material handling – with receiver or receiver coacting mea – Processes – Battery grid pasting
Patent
1993-09-03
1995-04-11
Cusick, Ernest G.
Fluent material handling, with receiver or receiver coacting mea
Processes
Battery grid pasting
141 5, 141198, 141 35, 220 412, 137576, B65B 304
Patent
active
054049180
ABSTRACT:
The storage tank consists of a main tank and ullage tank connected by a relatively small passage having a flow rate capacity up to 30% of the main fill line. To fill the tank, liquid cryogen is delivered to the main tank by either a top or bottom fill. Because the fill line is significantly larger than the passage, the main tank will become liquid full while the ullage tank remains substantially empty. When the tank becomes liquid full a dramatic drop in the flow rate will result that can be detected by a relatively insensitive, and inexpensive, flow monitoring device thereby to stop the filling operation. The ullage tank will retain trapped gas and gradually allow the liquid from the main tank to enter the ullage tank through the passage until the liquid level in the tanks are equal. Once the liquid levels in the tanks equalize, a vapor space is created above the liquid to accommodate vaporizing cryogen and provide long hold times.
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patent: 4142562 (1979-03-01), Murray
patent: 4823829 (1989-04-01), Woods
Cusick Ernest G.
Minnesota Valley Engineering, Inc.
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