LEAD SCREW ASSEMBLY
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United States of America Patent
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Issued Date -
Mar 2, 2023
app pub date -
Aug 17, 2022
filing date -
Sep 2, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A leadscrew assembly includes a screw shaft along which is formed a first helical groove and a primary nut along which is form a second helical groove. The first helical groove and the second helical groove cooperate to define a track. The assembly also includes a secondary nut along which is formed a third helical groove. The first helical groove and the third helical groove cooperate to define a track with a nominal running clearance. A preload X is provided wherein when a load applied to the screw exceeds the predetermined preload, the secondary nut engages with the track such that load of the screw above preload X is transferred through the secondary nut and thus protecting the primary nut.
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