Jam tolerant linear actuator

A jam tolerant linear ballscrew actuator having a ballscrew actuator output over a preset range of travel, said ballscrew actuator driven through a differential via plural power paths therein, said ballscrew actuator comprising:

• a ballnut drivingly coupled to a first power path of said differential to rotate as power is provided through said differential;
• a splined hub drivingly coupled to a second power path of said differential to rotate as power is provided through said differential;
• a dual ballscrew having a first ballscrew portion driven through said ballnut to reciprocate as said ballnut rotates;
• said dual ballscrew coupled to a fixed splined shaft on which said dual ballscrew can only reciprocate as said dual ballscrew is driven through said ballnut as said ballnut rotates;
• a splined sleeve driven through said splined hub, said splined sleeve mounted in said splined hub for reciprocating movement as said splined sleeve rotates integrally with said splined hub, said splined sleeve coupled via a splined sleeve ballnut to a second ballscrew portion of said dual ballscrew to reciprocate with said dual ballscrew as said dual ballscrew reciprocates through said ballnut as said ballnut rotates;
• and
• an actuator output member coupled to said splined sleeve to provide said ballscrew actuator output over said range of travel as said dual ballscrew reciprocates through said ballnut as said ballnut rotates and as said splined sleeve reciprocates through said splined hub as said splined sleeve rotates integrally with said splined hub.