HIGH TORQUE LIMITED ANGLE COMPACT AND LIGHTWEIGHT ACTUATOR
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United States of America Patent
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Issued Date -
Jul 21, 2011
app pub date -
Apr 29, 2009
filing date -
Apr 30, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A high torque limited angle compact and lightweight actuator that comprises a driven pulley (11), a flexible tie-member (6), which is wound about the driven pulley (11), a linear actuator (7) and an inversion mechanism (8). In particular, the linear actuator (7), which is located with respect to the driven pulley (11) such that the direction is substantially tangent to it, comprises a movable element (10) that carries out a linear movement along a line according to two opposite directions (10'), (10''). The inversion mechanism is such that when an input portion (8') moves along a line (first straight line), tangential to the driven pulley, of a certain an amount a output portion (8'') moves along another line (second straight line), which is also tangential to the driven pulley, for a same movement amount, such that the total length of the tie-member (6) is unchanged. (FIG. 2)
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