Patent ID: 9574385
Date: 2017-02-21
CPC Classifications: E05F,E05Y,Y10T

Claim:
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.