Patent ID: 6530863
Filing Date: 2003-03-11
Classification: E05F,E05Y,E06B

Abstract:
An apparatus comprising a motor driven door operator unit for moving a door between open and closed positions, said operator unit comprising:a drive motor including a motor output shaft; a speed reduction drive mechanism including a housing, a gear drive mechanism supported in said housing and operably connected to said motor output shaft and to an operator output shaft, said drive motor being operable to drive said operator output shaft at a reduced speed in at least one direction of rotation, said gear drive mechanism including at least one gear operable to be non-rotatable with respect to said housing; a release member operably connected to said one gear and operable in a first position to lock said one gear against rotation with respect to said housing, said release member being movable to a second position to allow rotation of said one gear and said operator output shaft with respect to said housing; and an auxiliary drive shaft operably connected to said one gear and to said operator output shaft through said one gear when said release member is in said second position.