Lifting device for use at a manual work station
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United States of America Patent
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Nov 6, 2018
Grant Date -
Jul 21, 2016
app pub date -
Aug 26, 2014
filing date -
Aug 28, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A lifting device includes a framework (2) and a manipulator arm (8) pivotally connected to the framework. The manipulator arm includes a first end portion (19) and a second end portion (13) adapted to carry a tool (20). A balancing arrangement (7; 30, 39) includes a first part (7a; 30a; 39a) connected to the framework and a second part (7b; 30b; 39b) adapted to interact with the first end portion. At least one of the manipulator arm and the balancing arrangement includes a first balancing device (11; 31; 34), which is extendable to ensure that interaction between the second part and the first end portion is maintained. The first balancing device is adapted to generate a first balancing force which maintains a moment balance about the first joint. The manipulator arm has at least two rotational degrees of freedom in a first spherical coordinate system (17).
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