Automatic leveling system

In combination for use in a vehicle having a front, back and sides to level the vehicle relative to gravity,

• a plurality of vertical displacement means each disposed at an individual position relative to the vehicle and in displaced relationship to the other vertical displacement means for adjusting the vertical position of the vehicle relative to gravity in accordance with the operation of pairs of adjacent vertical displacement means,
• a plurality of switches supported relative to the vehicle and having open and closed states and constructed to become opened and closed in accordance with the tilting of the vehicle and with each of the switches being disposed to indicate the tilting of the vehicle relative to gravity from side to side and front to back,
• means responsive to the opening and closing of the different switches in the plurality in accordance with the tilting of the vehicle relative to gravity for operating at particular times pairs of adjacent vertical displacement means in a particular order to obtain an adjustment in the vertical position of the vehicle from side to side and front to back to obtain a resultant levelling of the vehicle relative to gravity, and
• the operation of two of the switches at the same time indicating the tilting of the vehicle toward one corner of the vehicle and with the means for operating pairs of vertical displacement means additionally operating an individual vertical displacement means to correct the tilting of the vehicle toward the one corner before the pairs of the vertical displacement means are operated to level the vehicle.

In combination for use in a vehicle having a front, a back and sides to level the vehicle relative to gravity,

• a plurality of jacks each disposed at an individual position relative to the vehicle and in displaced relationship to the other jacks for adjusting the vertical position of the vehicle relative to gravity in accordance with the operation of pairs of adjacent jacks,
• means disposed relative to the vehicle for sensing the tilting of the vehicle from a level disposition relative to gravity,
• means responsive to the sensing means for operating at particular times pairs of adjacent jacks in a particular order to obtain an adjustment in the vertical position of the vehicle from side to side and front to back to obtain a resultant leveling of the vehicle to gravity,
• the particular order of operating the jacks is first leveling of the vehicle side to side before leveling of the vehicle side to side before leveling of the vehicle front to back, and
• wherein if during operation of pairs of adjacent jacks to provide leveling of the vehicle front to back, the sensing means senses tilting of the vehicle side to side, the front to back leveling is discontinued and the side to side leveling is again initiated.