Method and apparatus for operating a movable barrier operator

摘要

METHOD AND APPARATUS FOR OPERATING A MOVABLE BARRIER Abstract of the Disclosure The movable barrier operator (10) is a shaft-mounted movable barrier operator that operates a garage door (20). Such an operator includes a motor (22) operably connected to shaft (26) such that motor (22) may move door (20) between the open and closed position. Shaft (26) may include axle (36) and wheels (38). The movable barrier (10) further includes a rotational drive unit (46) with a sun gear (52) having an open center (49) into which the axle (36) extends. Further, the rotational drive unit may have an annularly shaped portion (47) and a removable portion (48) such that the operator (10) may be installed onto a previously mounted garage door. The movable barrier operator may also include protection plates or a finger guard (90). 38 e,20 F--42 94 53a 53b 45 52 49 50 47 46 94 . 54a-. 54b