David Lee Dunn

US Patent:

55535216, Sep 10, 1996

Filed:

Jul 13, 1994

Appl. No.:

8/274223

Inventors:

David S. Dunn - Arcadia CA

International Classification:

B25B 3300

US Classification:

81484

Abstract:

A device for adjusting the spring tension in a door closer in situ comprises body having a front side and back side surface. Mounting screw openings are disposed within the body and are positioned at locations corresponding to locations of selected locking screws in the closer used to secure a spring cover. Mounting screws are disposed within respective mounting screw openings. A centrally positioned cavity is disposed within the body and accommodates rotatable placement of an adjustment shaft therein. The adjustment shaft comprises a hexagonal head extending outwardly from the front side surface, and is attached to an adjustment assembly comprising a drive disk extending outwardly from the back side surface of the device. Adjustment pins extend outwardly from the drive disk and are numbered and configured to correspond to adjustment holes in the spring cover. In situ adjustment of the closer is effected by removing selected locking screws, lowering the device into place against the closer and effecting engagement of the mounting screws and adjustment pins with exposed locking screw openings and adjustment holes, respectively, tightening the mounting screws to snugly fit against the closer, loosening the remaining locking screws, rotating the spring cover by rotating the hexagonal head to provide desired degree of spring tension, tightening the remaining locking screws, untightening the mounting screws, removing the device from the closer, and replacing and tightening the removed locking screws.