Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and gear
Reexamination Certificate
2007-06-26
2007-06-26
Sandy, Robert J. (Department: 3677)
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Closers
Spring and gear
C016S071000, C049S334000
Reexamination Certificate
active
10890570
ABSTRACT:
A door closer power adjusting device for a door closer having a spindle driven by a compressed spring with a movable plate for adjusting spring compression, or with a screw for adjusting spring compression, between a high and low level of compression. A powered unit moves the plate in a first direction to achieve the low level of compression and in a second direction to achieve the high level of compression. A switch activates the powered unit in the first direction and a first switch is engaged when the spring is compressed to the low level of compression to deactivate the powered unit. A timing circuit activates the powered unit in a second direction after passage of a predetermined time. A second switch is engaged when the spring is compressed to the high level of compression to deactivate the powered unit.
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Brown Peter Edward
Toledo George
Greer Burns & Crain Ltd
Jackson Andre′ L.
Jackson Corporation
Sandy Robert J.
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