Interlocking device for telescopic tow bar legs

Details Interlocking device for telescopic tow bar legs Interlocking device for telescopic tow bar legs

2005-09-20

2008-12-09

Morris, Lesley D (Department: 3611)

Land vehicles

Wheeled

Articulated vehicle

C280S479200, C280S491200

Reexamination Certificate

active

07461855

ABSTRACT:
One possible embodiment of the invention could comprise an interlocking device for the adjusting the length of at least one telescopic tow bar leg of a tow bar. The telescopic tow bar leg could comprise an inner bar and outer bar, the inner bar being generally movably received by the outer bar. Movement of an outer bar mounted pawl into engagement with inner bar may lock the inner bar in relationship to the outer bar. A pawl release mechanism may be used to either act directly upon the pawl or to rotate a cam that contacts the pawl. Either action generally causes the at least two surfaces of the pawl to move out of contact with the inner bar's pawl engagement area, thus substantially allowing the inner bar to move relative to the outer bar. This could allow a user to adjust the length of the telescopic leg.

REFERENCES:
patent: 3891237 (1975-06-01), Allen
patent: 4991865 (1991-02-01), Francisco
patent: 5580088 (1996-12-01), Griffith
patent: 5957477 (1999-09-01), Ensz et al.
patent: 6227305 (2001-05-01), Sayer
patent: 6357779 (2002-03-01), Mok et al.

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