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Door closer power adjusting device

  • US 20050011040A1
  • Filed: 07/14/2004
  • Published: 01/20/2005
  • Est. Priority Date: 07/18/2003
  • Status: Active Grant
First Claim
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1. A door closer power adjusting device for use with a door closer having a spring driven spindle with an adjusting screw for adjusting an amount of compression of said spring, comprising:

  • a shaft connected to said adjusting screw, a reversible motor for rotatably driving said shaft, 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, a timing circuit to activate said motor in a second direction after the passage of a predetermined amount of time, 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.

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