Patent ID: 8511364

Claim:
A spring motor, comprising: a housing; an output spool mounted in said housing for rotation in clockwise and counterclockwise directions about a first axis of rotation, said output spool defining a first hollow core extending through the first axis of rotation; a storage spool mounted in said housing for rotation in clockwise and counterclockwise directions about a second axis of rotation parallel to said first axis of rotation, said storage spool defining a second hollow core extending through the second axis of rotation; and a motor spring wound upon itself and upon the storage spool and having a first end and a second end, said motor spring being secured to said output spool at said first end; wherein said housing defines openings aligned with said first and second hollow cores, and further comprising first and second shafts extending completely through said housing and through said first and second hollow cores, respectively, wherein at least one of said first and second shafts is driven by said output spool, and the other of said first and second shafts rotates independently of said output spool.