Patent · US Active

Apparatus for raising a spring arm on a trailer hitch

US7934742B2 · kind B2 · utility

9Cited by

7References

59Claims

0Family size

Assignee

Progress Mfg. Inc. · US

Inventors

Jed K. Anderson · Lindon, US
Fred P. Smith · Alpine, US

Key dates

Filing date	Jul 28, 2008
Grant date	May 3, 2011
Priority date	—
Expiry date	Jul 28, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60D1/30
WIPO fieldTransport
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.