Locking system for a semitrailer sliding undercarriage with air

Details Locking system for a semitrailer sliding undercarriage with air Locking system for a semitrailer sliding undercarriage with air

1996-05-01

1997-04-15

Dickson, Paul N.

Land vehicles

Wheeled

Running gear

B62D 5306

Patent

active

056201958

ABSTRACT:
A locking system with air pressure protection valve mounted on a sliding undercarriage of a semitrailer, the semitrailer pulled by a tractor. The locking system is used for securing and releasing the sliding undercarriage from a pair of parallel rails mounted on an underside of the semitrailer. The locking system may be a pneumatic system or electro-pneumatic system and includes at least one air cylinder with piston. The air cylinder is mounted on the sliding undercarriage and disposed next to the parallel rails. A locking pin is attached to the piston with a portion of the locking pin inserted into selected locking pin hole in a locked position in the parallel rails. An air valve directs pressurized air to the air cylinder for retracting and extending the piston. The air pressure protection valve is attached between a pressurized air source and the air valve and prevents the operation of the air valve if the air pressure in the pressurized air source drops below a predetermined amount of air pressure. The locking system with air pressure protection valve may also include a plurality of air cylinders with pistons attached to locking pins for retracting and extending the pins in locking pin holes in the parallel rails.

REFERENCES:
patent: 3993361 (1976-11-01), Stelzer
patent: 4353565 (1982-10-01), Smith et al.
patent: 4586755 (1986-05-01), Worbois

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