Door closer power adjusting device

摘要

A door closer power adjusting device for use with a door closer having a spindle driven by a compressed spring with a movable plate for adjusting an amount of compression of said spring, or with an adjusting screw for adjusting an amount of compression of said spring, between a first high level of compression and a second low level of compression. A powered unit is provided for moving the plate in a first direction to achieve the second low level of compression and in a second direction to achieve the first high level of compression. A user engageable switch is used to activate the powered unit in the first direction and a first switch is arranged to be engaged upon the spring being compressed to the second low level of compression to deactivate the powered unit. A timing circuit is used to activate the powered unit in a second direction after the passage of a predetermined amount of time. A second switch is arranged to be engaged upon the spring being compressed to the first high level of compression to deactivate the powered unit.