Invention Grant
- Patent Title: Apparatus for raising a spring arm on a trailer hitch
- Patent Title (中): 用于在挂车挂钩上升起弹簧臂的装置
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Application No.: US12181263Application Date: 2008-07-28
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Publication No.: US07934742B2Publication Date: 2011-05-03
- Inventor: Jed Anderson , Fred P. Smith
- Applicant: Jed Anderson , Fred P. Smith
- Applicant Address: US UT Provo
- Assignee: Progress Mfg., Inc.
- Current Assignee: Progress Mfg., Inc.
- Current Assignee Address: US UT Provo
- Agency: Clayton, Howarth & Cannon, P.C.
- Main IPC: B60D1/34
- IPC: B60D1/34

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.
Public/Granted literature
- US20080277903A1 APPARATUS FOR RAISING A SPRING ARM ON A TRAILER HITCH Public/Granted day:2008-11-13
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