Walking-beam conveyor
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United States of America Patent
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Mar 22, 2011
Grant Date -
Jul 10, 2008
app pub date -
Dec 12, 2007
filing date -
Jan 8, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A walking-beam conveyor has a pair of longitudinally extending, parallel, and transversely spaced fixed support rails, at least one walking beam between and generally parallel to the rails, and at least two lifters underneath the walking beam and operable to raise the walking beam from a return position generally below the rails to a conveying position generally above the rails. In accordance with the invention a first longitudinally extensible hydraulic actuator has opposite longitudinal ends one of which is secured relative to the rails. A second longitudinally extensible hydraulic actuator has opposite longitudinal one of which is secured to the other end of the first actuator and the other of which is secured to the walking beam.
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