US 12,135,072 B1
Expanding force electric linear actuator
Blake Sessions, Boston, MA (US); and Toomas Sepp, Somerville, MA (US)
Assigned to Liftwave, Inc., Somerville, MA (US)
Filed by Liftwave, Inc., Somerville, MA (US)
Filed on Feb. 8, 2024, as Appl. No. 18/436,624.
Int. Cl. F16H 19/06 (2006.01); F16H 55/36 (2006.01); F16H 63/06 (2006.01)
CPC F16H 19/0628 (2020.05) [F16H 55/36 (2013.01); F16H 63/062 (2013.01); F16H 2019/0668 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pulley system comprising:
a plurality of fixed sheaves arranged to at least partially encircle an output shaft;
a plurality of traveling sheaves coupled to the output shaft, the output shaft configured to pass through the fixed sheaves and translate along an axis of travel, wherein the plurality of traveling sheaves are arranged such that a geometric average of belt tension created by spans of belt between the plurality of traveling sheaves and the plurality of fixed sheaves is approximately coincident with a centerline of the output shaft; and
a belt extending between and around the plurality of fixed sheaves and the plurality of traveling sheaves such that the belt flexes toward a single surface of the belt.