(under the class definition) Device provided with powered means (other than a mere spring) to move the closure and with a manipulatable mechanical means to move the closure or means to disconnect the motor drive to closure, the means or motor being used interchangeably and at the choice of the user.
SEE OR SEARCH THIS CLASS, SUBCLASS:
26+, for a motorized closure operator having means responsive to an obstruction to release the drive; e.g., to permit manual arrestation or reversal of closure movement.
98+, for closures interconnected for concurrent movement and having means permitting independent movement.
SEE OR SEARCH CLASS
74, Machine Element or Mechanism,
625+, for alternate manual and power operators for devices of that class. 91, Motors: Expansible Chamber Type,
391, for a motor of that class and alternate manual means for moving the load.
475, Planetary Gear Transmission Systems or Components,
