发明名称 Apparatus for raising a spring arm on a trailer hitch
摘要 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.
申请公布号 US7934742(B2) 申请公布日期 2011.05.03
申请号 US20080181263 申请日期 2008.07.28
申请人 PROGRESS MFG., INC. 发明人 ANDERSON JED;SMITH FRED P.
分类号 B60D1/34 主分类号 B60D1/34
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