Transfer apparatus
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United States of America Patent
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Sep 6, 2011
Grant Date -
Feb 5, 2009
app pub date -
Jul 25, 2008
filing date -
Jul 27, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A transfer apparatus includes a stationary base, a lift base, a lifting mechanism for vertically moving the lift base, a rotary base mounted to the lift base, a rotating mechanism for rotating the rotary base about a vertical rotation axis, a linear moving mechanism supported by the rotary base, and a work hand supported by the linear moving mechanism. The lifting mechanism includes a slide guide mechanism for vertical movement of the lift base, and first and second screw-feeding mechanisms. Each screw-feeding mechanism includes a rotatable vertical screw shaft, and a nut member provided on the lift base and screwed onto the screw shaft. The first and the second screw-feeding mechanisms are spaced from each other, with the rotation axis of the rotary base being located between the first and the second screw-feeding mechanisms.
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