Magnetic carrying device
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United States of America Patent
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-
May 13, 2003
Grant Date -
May 23, 2002
app pub date -
Aug 27, 2001
filing date -
Aug 29, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drive member has a spiral magnetic coupling in its upper surface configured from a N pole spiral and a S pole spiral. A carrier can slidably move in the shaft direction to pass through a point that is a fixed distance from the upper surface of the drive member, and a magnetic coupling is provided at an interval the same as the interval between the N pole spiral and the S pole spiral of the spiral magnetic coupling. The carrier is moved directly by the rotational operation of the drive member. The arranged interval (d) of the drive member along a conveying path is a positive integer multiple of twice the interval (p) between the N pole spiral and S pole spiral of the spiral magnetic coupling. The carrier can be moved smoothly and without interruption, even though a transfer part divides the magnetic carrying path between successive chambers.
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