Triple gate valve assembly
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United States of America Patent
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Dec 31, 1985
Grant Date -
N/A
app pub date -
Oct 26, 1984
filing date -
Oct 26, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve assembly including three separate gate valves aligned serially with one another and a mechanical linkage for operating the three separate gates in coordination with one another to permit small pieces of lumpy or granular and particulate solid materials to flow under influence of gravity through the three valves from a low pressure zone into a high pressure zone, without reverse flow of material from the high pressure zone to the low pressure zone. Each gate is biased to a closed condition and provides a substantially airtight seal when it is closed to prevent reverse flow from the high pressure zone to the low pressure zone. A mechanical linkage opens the first and last gates simultaneously and alternatingly opens the middle gate when the first and last gates are closed.
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