Atmospheric door closure
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United States of America Patent
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-
Dec 25, 1990
Issued Date -
N/A
app pub date -
Oct 18, 1989
filing date -
Dec 5, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Atmospheric door closure for sealing of the orifice of a process tube. A quartz end plate positions at the end of a plurality of spring loaded quartz rods to seal against the orifice of the process tube. The quartz rods slide against spring pressure behind Teflon sleeves contained in horizontal tubes. Springs in the horizontal tubes provide pressure against the quartz end plate when the quartz plate engages a process tube. A clamp and adjusting assembly secures to the paddle support shaft, and provides for alignment of the quartz rods and plate with respect to the paddle support shaft and the orifice of the process tube.
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