Locking mechanism for self steering semi-trailer

Details Locking mechanism for self steering semi-trailer Locking mechanism for self steering semi-trailer

1988-05-27

1990-02-27

Marmor, Charles A.

Land vehicles

Wheeled

Articulated vehicle

280442, B26D 1302

Patent

active

049039768

ABSTRACT:
A tractor-trailer unit with a self steering semi-trailer characterized by a steerable bogie assembly includes elongated cables connected to the bogie assembly by way of a rotatable pulley, the cables being moved in response to a cam and lever arrangement, and a pair of opposed locking levers which are responsive to slack in one or the other of the cables to engage the pulley to prevent further turning movement of the bogie assembly in the direction of the slack cable. The pulley includes a set of circumferentially spaced apart pins which engage the respective locking members in an escapement action to allow the steerable bogie to be turned back toward a centered or aligned position with the trailer frame if one or both cable traces become slack.

REFERENCES:
patent: 4702488 (1987-10-01), Baillie
patent: 4759563 (1988-07-01), Nash

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