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US 11,396,931 B2Granted
Twisted string transmission
AssigneeBioservo Technologies Aktiebolag
InventorMartin Oskar Gustaf Ewaldsson
Life of this patent
Estimating the term…
Abstract
A twisted string transmission for converting a rotational motion to a linear motion is provided, comprising a motor (1) and a string (2) to be connectable to a load (3). The string (2) has a variable diameter along its length.
Claims19
A twisted string actuator that converts rotational motion to linear motion, comprising:
- a motor that generates the rotational motion;
- and
- a string having threads that are substantially parallel and twist about each other between the motor and a load, the string having different thread diameters at different portions of the string along its length between the motor and the load, wherein the string connects to the motor at a first end thereof and the load at a second end thereof, and the actuator is without a split between the motor and the load that engages the threads and separates the threads in a direction transverse to a longitudinal axis of the string.
A twisted string actuator for converting rotational motion to linear motion, comprising:
- a motor that generates the rotational motion;
- and
- a string that comprises three looped sections, including a first section adjacent the motor, a second section adjacent a load, and a third section between the first and second sections, and wherein each of the first section and the second section comprise more than one loop of threads, respectively.
A twisted string actuator that converts rotational motion to linear motion for moving a load, comprising:
- a motor that generates the rotational motion;
- a split;
- and
- a string having threads that are substantially parallel and twist around each other between the motor and the split, the split located between the threads of the string and precludes twisting of the threads around each other between the split and the load, and wherein the string has different thread diameters at different portions of the string along its length between the motor and the split.
1 more element
Dependencies are inferred from the claim text.