Invention Grant
US07934742B2 Apparatus for raising a spring arm on a trailer hitch 有权
用于在挂车挂钩上升起弹簧臂的装置

Apparatus for raising a spring arm on a trailer hitch
Abstract:
An apparatus for raising a spring arm of a trailer hitch. The apparatus may include a lift, such as a jack, for attaching to a tongue of a trailer. A link member may be pivotally attached to the lift. The link member may also be pivotally attached to a bracket which may be attached to the spring arm. A brace member may be attached to the link member on an end opposite the bracket. As the lift raises the link member, the link member may pivot about the brace member such that movement of the bracket may be amplified as compared to movement of the lift. Moreover, lifting of the spring arm can be easily accomplished.
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