Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Diana L. Hamman0
Gary L. Hamman0
Date of Patent
May 1, 2018
0Patent Application Number
152712900
Date Filed
September 21, 2016
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A device to apply a rotational force to a spring of a rollup or overhead garage door counterbalancing mechanism. The device has a rotatable driven member mounted in a housing. The housing and the driven member have slots with an open end adapted to receive the shaft of the overhead garage door counterbalancing mechanism. A coupling member is configured to mount to the driven member and connect the driven member to the winding cone of a garage door spring to apply rotational force to the spring. The housing with the driven member may be connected to the body of an existing power tool in place of the original tool head, or, the housing may be permanently combined with a motor and transmission to provide a special purpose tool.
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