Automatic door operator with compound epicyclic gear drive system

摘要: Door operator for commercial and domestic use with swing-mounted doors are disclosed. Each employs a variable-speed d.c. motor as prime mover, vertically oriented door-driving output shaft journalled in transmission having compact housing which includes shock mounts mounting of the within structure associated door. The provides speed reduction coupling drive to substantially right-angled relationship between their axes rotation. gear, is coupled by miter gear arrangement different types, coaxial relation but independently rotatable about it. Epicyclic sun-and-planet mechanism specialized design planet gears driven epicyclic movement axis shaft, providing shaft. Different possible spring arrangements, including rack-gear operated modules interchangeable character, used resiliently restorative force upon rotation thereof at least one direction.