Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ping Liu0
Date of Patent
October 23, 2007
0Patent Application Number
114942480
Date Filed
July 27, 2006
0Patent Citations Received
Patent Primary Examiner
Patent abstract
Each of a plurality of weights has a central hole and a slot extending through the central hole. A shaft has a grip handle. A rotatable spindle extends through the grip handle with a plurality of cam plates adjacent to each end of the spindle and an adjustment knob at each end of the spindle. The cam plates each have an outer diameter adapted to fit the central hole of a weight. The weights include a set of weights positioned adjacent to each end of the rotatable spindle and adjacent to the cam plates. A holder is cooperable with the shaft with protrusion blocks adapted to cooperate with the shaft to form a self-locking mechanism.
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