Operating system for locking pins for sliding undercarriages

A semitrailer locking pin operating system adapted to be used with a trailer having a pair of rails having locking holes that are selectively slidably carried by a suspension frame, the system comprising:

• a source of air pressure;
• a main supply line in fluid communication with said source of air pressure;
• a first valve in fluid communication with said main supply line, said first valve movable between open and closed positions;
• at least two locking pins;
• a return spring associated with each of said locking pins, each of said return springs continuously forcing one of said locking pins into an engaged position;
• a locking pin driver assembly connected to each of said locking pins whereby each driver pin assembly includes:
• a hollow fixed bracket;
• a cylinder carried by said bracket;
• a piston engaging said cylinder, said piston connected to said locking pin;
• said return spring being disposed within said cylinder, said return spring engaging said piston;
• said piston disposed within said cylinder and said hollow fixed bracket.

A semitrailer locking pin operating system adapted to be used with a trailer having a pair of rails having locking holes that are selectively slidably carried by a suspension frame, the system comprising:

• a source of air pressure;
• a main supply line in fluid communication with said source of air pressure;
• a first valve in fluid communication with said main supply line, said first valve movable between open and closed positions;
• at least two locking pins adapted to be carried by the suspension frame;
• a return spring associated with each of said locking pins, each of said return springs continuously forcing one of said locking pins into an engaged position;
• and
• a locking pin driver assembly connected to each of said locking pins, each of said locking pin driver assemblies having a piston and a shaft with the piston mounted on said shaft, said locking pin formed with a cylinder therein whereby at least a portion of the piston is disposed within the cylinder.

A semitrailer locking pin operating system adapted to be used with a trailer having a pair of rails having locking holes that are selectively slidably carried by a suspension frame, the system comprising:

• a source of air pressure;
• a main supply line in fluid communication with said source of air pressure;
• a first valve in fluid communication with said main supply line, said first valve movable between open and closed positions;
• at least two locking pins;
• a return spring associated with each of said locking pins, each of said return springs continuously forcing one of said locking pins into an engaged position;
• and
• a locking pin driver assembly connected to each of said locking pins, each of said driver assemblies having a service chamber in fluid communication with said first valve;
• said service chamber having an output shaft;
• and lever means connecting said output shaft to said locking pin for moving said locking pin to said disengaged position when said shaft is extended from said service chamber.