Tandem wheel unlocking assist device

Details Tandem wheel unlocking assist device Tandem wheel unlocking assist device

2005-02-22

2005-02-22

Bryant, David P. (Department: 3726)

Metal working

Method of mechanical manufacture

Disassembling

C029S244000, C029S270000, C280S149200, C280S433000, C294S019200

Reexamination Certificate

active

06857176

ABSTRACT:
A device for assisting in the release of a tandem wheel locking pin from a locking rail of a semi-trailer is disclosed. In a basic embodiment, the device consists of a gripping plate which engages the locking pin release rod of the tandem unit, a helical spring, and a hook plate which engages a frame member of the tandem unit such that tension is maintained on the spring. By locking the brakes of the tandem unit and rocking the trailer, friction between the locking rail and the locking pin is released, and the tension of the spring can pull the pin, at least partially, from the locking rail. An alternate embodiment of the device includes a positioning assist pin which may be placed into the locking rail at the point at which the tandem unit is to be moved to aid in aligning the locking pins at a new location.

REFERENCES:
patent: 5199732 (1993-04-01), Lands et al.
patent: 5232234 (1993-08-01), McCombs
patent: 5314201 (1994-05-01), Wessels
patent: 5480171 (1996-01-01), Cheffey
patent: 5716071 (1998-02-01), Stanley et al.
patent: 6322091 (2001-11-01), Lindley

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