Extension coupling for interconnecting trailer and tow hitch
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United States of America Patent
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May 11, 2010
Grant Date -
Feb 7, 2008
app pub date -
Jun 13, 2007
filing date -
Jun 13, 2006
priority date (Note) -
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Abstract
An extension coupling for interconnecting a trailer to a tow hitch carried on a tow vehicle includes a pin box assembly having a first end and a second end. The first end is pivotally connected to the trailer. A king pin is connected to the second end. The pin box assembly includes a locking wedge that engages the tow hitch to strictly limit pivoting movement of the pin box assembly relative to the tow hitch.
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