NASA NTRS · 19920000103
Quick-Fit Trailer Coupling For A Grader
Abstract
Ripper attachment on grading tractor adapted to lift tongue of trailer tow bar hydraulically. Unnecessary for tractor operator to use jack or fork, lift to raise tongue. Enables tractor operator, acting alone, to hitch trailer to tractor, without expense and complication of dedicated hydraulic lifting mechanism for trailer hitch.
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Soper, Terry A., Moulton, Calvin T.. 1992-02-01. Quick-Fit Trailer Coupling For A Grader. https://ntrs.nasa.gov/citations/19920000103
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