Patent ID: 8087445
Filing Date: 2012-01-03
Classification: E06B,F03G

Abstract:
1. A lift motor comprising: at least one motor unit comprising a first output drum and a first drum gear operatively connected to said first output drum rotatable about a first axis and a storage drum operatively connected to a second drum gear rotatable about a second axis that is parallel to the first axis wherein the first drum gear and the second drum gear engage one another, and a spring which is operatively connected between said output drum and said storage drum such that as said spring is transferred from the storage drum to the output drum by rotation of the output drum the spring creates a resisting force which causes the rewinding of said spring on said storage drum; said first output drum, said first drum gear, said storage drum, said second drum gear and said spring being supported in a motor unit housing; a spool unit comprising a spool for winding a cord thereon rotatable about a third axis that is parallel to the first axis and a first gear operatively connected to said spool, said spool and said first gear being supported in a spool unit housing where said spool unit housing is separate from said motor unit housing; at least one of said first output drum and said storage drum operatively connected to a second gear; and a quick-connect coupler for releasably connecting said motor unit housing to said spool unit housing such that said second gear engages said first gear when said motor unit housing is connected to the spool unit housing and rotation of said at least one of said first output drum and said storage drum rotates the spool.