Patents Assigned to ECM Motor Company
  • Power opener with manual override
    Patent number: 4137796
    Abstract: A mechanism which normally is driven by a motor, but which can be safely manually driven by a hand crank or the like in case of a power shortage or other emergency. The mechanism has a power-driven drive gear and a driven assembly which preferably includes a gear-like member, such as a worm, and a crank-receiving member, such as an internally splined hub. A disconnecting assembly which is responsive to engagement of the hand crank in the crank-receiving member is provided to disconnect the driven assembly from the power-driven drive gear.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: February 6, 1979
    Assignee: ECM Motor Company
    Inventor: Harry H. Bostrom