Invention Grant
US07481440B2 Biasing means adjustment mechanism and method 失效
偏差是调节机制和方法

Biasing means adjustment mechanism and method
Abstract:
The device of this invention includes a frame assembly, a support bracket with an opening connected to the frame assembly, a first spring pivotably connected to the frame assembly, and a control mechanism. The control mechanism can be positioned into a first condition where an end of the spring is engaged to the opening in the support bracket and a second condition where the end of the spring is disengaged from the opening.
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