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Fault tolerant linear actuator

United States Patent

September 14, 2004
View the Complete Patent at the US Patent & Trademark Office
In varying embodiments, the fault tolerant linear actuator of the present invention is a new and improved linear actuator with fault tolerance and positional control that may incorporate velocity summing, force summing, or a combination of the two. In one embodiment, the invention offers a velocity summing arrangement with a differential gear between two prime movers driving a cage, which then drives a linear spindle screw transmission. Other embodiments feature two prime movers driving separate linear spindle screw transmissions, one internal and one external, in a totally concentric and compact integrated module.
Tesar; Delbert (Austin, TX)
Board of Regents The University of Texas System (Austin, TX)
10/ 455,779
June 5, 2003
The U.S. Government may own certain rights in this invention pursuant to the terms of the U.S. Department of Energy grant number DE-FG04-94EW37966.