High aspect ratio threadform
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United States of America Patent
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Oct 26, 2010
Issued Date -
N/A
app pub date -
Aug 6, 2007
filing date -
Aug 4, 2006
priority date (Note) -
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Abstract
A threadform for a gate valve has a set of threads on a stem that engage a threaded receptacle of the gate. When the stem is rotated, the gate moves. The threads have a thread height to thread base thickness ratio that is at least the inverse of 0.7 times e raised to 0.388 divided by a nominal thread diameter of the threads. That ratio is at least 1.1.
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