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Door actuator

  • US 9,574,385 B2
  • Filed: 01/27/2015
  • Issued: 02/21/2017
  • Est. Priority Date: 02/22/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • attaching a power boost assembly to an existing door closer device comprising a housing, a pinion extending out of the housing, and a spring seated within the housing and engaged with the pinion, wherein the power boost assembly comprises a driver, an energy storage device, a first actuation member, and a second actuation member, and wherein attaching the power boost assembly to the door closer device includes coupling the driver to a portion of the pinion located outside the housing;

    moving a door to compress the spring of the door closer device;

    rotating the pinion as a result of moving the door;

    conveying an energy to the energy storage device during a first motion of the door via the first actuation member; and

    delivering a torque provided by the energy in the energy storage device through the second actuation member to the pinion as a result of a second motion of the door in a direction different than that of the first motion.

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