Anti-jackknifing apparatus for a semitrailer rig

Details Anti-jackknifing apparatus for a semitrailer rig Anti-jackknifing apparatus for a semitrailer rig

1987-02-25

1988-01-19

Mitchell, David M.

Land vehicles

Wheeled

Articulated vehicle

280426, B62D 5308

Patent

active

047201185

ABSTRACT:
In an anti-jackknifing apparatus for a semitrailer rig, upon coupling of a semitrailer to a tractor by insertion of a king pin and a wedge on the trailer into a fifth wheel of the tractor, a pin connected to the wedge traverses a guideway to execute therealong a movement limited and attenuated by double-action hydraulic cylinders connected to hydraulic valve group in turn electrically tied to a control unit. At the guideway, limit switches are provided for setting for each direction of angular motion a predetermined maximum jackknifing angle dependent on vehicle construction. The attenuation of rotary movement between the tractor and the semitrailer is implemented by throttle valves as a function of vehicle speed as measured by a speedometer and as a function of brake pressure as measured by two pressure switches.

REFERENCES:
patent: 3250547 (1966-05-01), Myers
patent: 3722918 (1973-03-01), Conner
patent: 4015859 (1977-04-01), Hegel et al.
patent: 4109929 (1978-08-01), Koroknay et al.
patent: 4204700 (1980-05-01), Haines, Sr.
patent: 4313616 (1982-02-01), Howard
patent: 4438943 (1984-03-01), Hebert

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