A stabilizing jack includes a base securable to a vehicle frame with a drive screw rotatably mounted to the base and a screw follower threadingly secured to the drive screw. A length adjustable lift leg is pivotally connected at an upper end to the screw follower. A stabilizing member is pivotally connected at a first end to the base inward from the screw follower. The lift leg is pivotally connected at an outer end to the stabilizing member. Downward extension of the lift leg through outward advancement of the screw follower on the screw and downward pivoting of the lift leg by the stabilizing member advances the foot into the ground to raise the vehicle frame relative to the suspension. The extended lift leg and stabilizing member form a triangle with the base providing resistance to lateral movement of the vehicle frame relative to the wheels and suspension.

A stabilizing jack includes a base securable to a vehicle frame with a drive screw rotatably mounted to the base and a screw follower threadingly secured to the drive screw. A length adjustable lift leg is pivotally connected at an upper end to the screw follower. A stabilizing member is pivotally connected at a first end to the base inward from the screw follower. The lift leg is pivotally connected at an outer end to the stabilizing member. Downward extension of the lift leg through outward advancement of the screw follower on the screw and downward pivoting of the lift leg by the stabilizing member advances the foot into the ground to raise the vehicle frame relative to the suspension. The extended lift leg and stabilizing member form a triangle with the base providing resistance to lateral movement of the vehicle frame relative to the wheels and suspension.

The present invention is a universal adapter attachable to the landing gear shaft of a semi-truck trailer to replace the use of manual hand crank handle and facilitate automation of raising and lowering the landing gear. The automation may be electric powered using an electric impact wrench or pneumatic using an air powered impact wrench. The universal adapter significantly eliminates the issues using the existing hand-cranks handle such as back, shoulder, knee and hand injuries and reduce the operation time for raising and lowering a landing gear.

The present invention is a universal adapter attachable to the landing gear shaft of a semi-truck trailer to replace the use of manual hand crank handle and facilitate automation of raising and lowering the landing gear. The automation may be electric powered using an electric impact wrench or pneumatic using an air powered impact wrench. The universal adapter significantly eliminates the issues using the existing hand-cranks handle such as back, shoulder, knee and hand injuries and reduce the operation time for raising and lowering a landing gear.

A motorized lifting system for use on a semi-trailer. The lifting system may comprise a lifting unit capable of mounting to a jack on the semi-trailer, allowing the lifting unit to raise and lower the dolly legs of the jack. The lifting unit may comprise a motor and a series of sprockets and chains connecting the motor to a drive shaft that mounts to a rod of the jack, such that turning the rod raises or lowers the dolly legs.

A motorized lifting system for use on a semi-trailer. The lifting system may comprise a lifting unit capable of mounting to a jack on the semi-trailer, allowing the lifting unit to raise and lower the dolly legs of the jack. The lifting unit may comprise a motor and a series of sprockets and chains connecting the motor to a drive shaft that mounts to a rod of the jack, such that turning the rod raises or lowers the dolly legs.

Aspects herein relate to using a three or more points to control the angular orientation of a structure via three or more jacks, and then stabilizing the structure via one or more stabilizers. In some aspects, the foregoing structure may include, for example, a motor home, recreational vehicle, travel trailer or fifth wheel trailer.

Aspects herein relate to using a three or more points to control the angular orientation of a structure via three or more jacks, and then stabilizing the structure via one or more stabilizers. In some aspects, the foregoing structure may include, for example, a motor home, recreational vehicle, travel trailer or fifth wheel trailer.

A motorized lifting system for use on a semi-trailer. The lifting system may comprise a lifting unit capable of mounting to a jack on the semi-trailer, allowing the lifting unit to raise and lower the dolly legs of the jack. The lifting unit may comprise a motor and a series of sprockets and chains connecting the motor to a drive shaft that mounts to a rod of the jack, such that turning the rod raises or lowers the dolly legs.

A motorized lifting system for use on a semi-trailer. The lifting system may comprise a lifting unit capable of mounting to a jack on the semi-trailer, allowing the lifting unit to raise and lower the dolly legs of the jack. The lifting unit may comprise a motor and a series of sprockets and chains connecting the motor to a drive shaft that mounts to a rod of the jack, such that turning the rod raises or lowers the dolly legs.