Patent ID: 7234201
Filing Date: 2007-06-26
Classification: E05F,E05Y,Y10T

Abstract:
1. A door closer power adjusting device for use with a door closer having a door engaging spindle rotatably driven by a spring with an adjusting screw for adjusting an amount of compression of said spring, comprising: a shaft connected to said adjusting screw to rotatably drive said adjusting screw, a reversible motor connected to said shaft to rotatably drive said shaft without rotatably driving said spindle, a power supply for said motor, a switch to activate said motor in a first direction, a first switch arranged to be engaged upon said shaft rotating a sufficient number of times to adjust said compression of said spring to a predetermined level and to deactivate said motor when said compression of said spring reaches the predetermined level, a timing circuit to activate said motor in a second direction after the passage of a predetermined amount of time following said deactivation of said motor by said first switch, a second switch arranged to be engaged upon said shaft rotating a sufficient number of times to return said compression of said spring to its original level and to deactivate said motor when said compression of said spring reaches the original level.