A machine includes a frame and an oscillating hitch. A first cylinder couples to a first side of the oscillating hitch and a first side of the frame. A second cylinder couples to a second side of the oscillating hitch and a second side of the frame. A first isolating mechanism couples to the first cylinder and rotates in response to a first rotation of the first cylinder relative to the frame or the oscillating hitch. A first angle sensor senses a first angular displacement of the first isolating mechanism about a first rotational axis. A second isolating mechanism couples to the second cylinder and rotates in response to a second rotation of the second cylinder relative to the frame or the oscillating hitch. A second angle sensor senses a second angular displacement of the second isolating mechanism about a second rotational axis.

An auxiliary dolly attachable to the rear of a primary trailer includes a first portion attachable to the primary trailer, a second portion comprising one or more axles with wheels, and a pivot point at which the first portion is coupled to and movable relative to the second portion, and further includes one or more cylinders configured to adjust the first and second portions relative to each other and apportion weight between the primary trailer and the auxiliary dolly.

A work vehicle includes a first ground-engaging implement and a second ground-engaging implement connected to a chassis. The first ground-engaging implement moves within a first movement envelope with respect to the chassis, and the second ground-engaging implement moves within a second movement envelope with respect to the chassis. A lift arm is connected to the chassis and positioned between the first and second ground-engaging implements. The lift arm moves along a range of movement between a raised position and a lowered position. The lift arm is entirely positioned outside both of the first movement envelope and the second movement envelope within the entire range of movement between the raised position and the lowered position, such that the lift arm is permitted to move along the entire range of movement between the raised position and the lowered position without abutting the first movement envelope or the second movement envelope.

In order, in the case of a trailer hitch, comprising a ball neck, which is movable between a working position and a rest position and has a pivot bearing body arranged at a first end and a coupling ball arranged at a second end, a pivot bearing unit, which is arranged fixed to a vehicle and by means of which the pivot bearing body is received such that it is pivotal for the purpose of performing a pivotal movement about a pivot axis between the working position and the rest position, and a rotation-blocking device that is active between the pivot bearing unit and the pivot bearing body, to achieve fixing of the rotation-blocking device in the release position in the simplest possible manner, it is proposed that there run between receptacles in the rotation-blocking device blocking faces against which the rotation-blocking bodies of the rotation-blocking device are configured to abut and from which the receptacles extend, that rotation-blocking units of the rotation-blocking device and the receptacles are arranged at angular spacings from one another around the pivot axis such that, in all the pivotal positions of the pivot bearing body that are provided, including the rest position and with the exception of the working position, the rotation-blocking body of at least one of the rotation blocking units lies opposite one of the blocking faces, and thus this blocking face blocks movement of the actuation body in the actuation direction.

In order to improve a trailer hitch, comprising a ball neck, which is movable between a working position and a rest position and has a pivot bearing body arranged at a first end and a coupling ball arranged at a second end, a pivot bearing unit, which is arranged fixed to a vehicle and by means of which the pivot bearing body is received such that it is pivotal for the purpose of performing a pivotal movement about a pivot axis between the working position and the rest position, and a rotation-blocking device that is active between the pivot bearing unit and the pivot bearing body, it is proposed that there run between the working position receptacles and the rest position receptacles of the rotation-blocking device blocking faces against which rotation-blocking bodies of the rotation-blocking device are configured to abut, that rotation-blocking units of the rotation-blocking device and the working position receptacles and the rest position receptacles are arranged at angular spacings from one another around the pivot axis such that, in all the pivotal positions of the pivot bearing body that are provided, with the exception of the working position and the rest position, the rotation-blocking body of at least one of the rotation-blocking units lies opposite one of the blocking faces, and thus this blocking face blocks movement of the actuation body in the actuation direction.

A trailer jack device is provided. The device may include: a gearbox for actuating a trailer; and a mount connected to the gearbox via a tube. The mount may be configured to couple the trailer to the gearbox. Further, the gearbox may have a gear reduction ratio for a power drill to perform at peak efficiency while minimizing motor burnout.

A trailer coupler assembly facilitates the automatic coupling and decoupling of a trailer. A trailer coupler assembly can include a main body with a frontward-facing opening for receiving a rearwardly oriented trailer ball. A locking assembly can be integrated with the main body and can allow the rearwardly oriented trailer ball to insert into the frontward-facing opening to automatically secure a trailer to a vehicle. A release assembly can interface with the locking assembly to enable the rearwardly oriented trailer ball to be decoupled from the main body.

A vehicle hauling apparatus for hauling a second vehicle with a first vehicle includes: a hitch bar for attaching the apparatus to a hitch receiver; a first rail mounted and arranged vertically to the hitch bar; a second rail mounted and arranged to slide vertically along the first rail; a jacking mechanism connecting the first rail to the second rail so as to lift and lower the second rail; a first element of a pivot attached to the second rail; a wheel cradle in which a tire of the second vehicle may be seated; and a second element of the pivot attached to the wheel cradle; whereby the tire of the second vehicle may be rolled along a ground surface into the wheel cradle while the wheel cradle rests on the ground surface and then be raised into a position for hauling by the jacking mechanism. A vehicle hitch jacking accessory, includes: a hitch bar for attaching the vehicle hitch jacking accessory to a hitch receiver of a vehicle; a first rail mounted and arranged vertically to the hitch bar; a second rail mounted and arranged to slide vertically along the first rail; a jacking mechanism connecting the first rail to the second rail so as to lift and lower the second rail; and a secondary hitch receiver attached to the second rail, whereby a second accessory having a hitch bar may be attached to the vehicle hitch jacking accessory.

A system and method of raising and lowering a ball coupler for coupling to a ball hitch is provided. A combination of hydraulic pump and hydraulic piston are employed to raise and lower the ball coupler of a gooseneck trailer. Both custom and off the shelf parts combine to create a user friendly system to couple and uncouple a gooseneck trailer to the truck. The system described herein replaces the need to raise and lower a gooseneck trailer's coupling system by hand crank and gear box and even the need to climb into the back of the truck bed. Varying trailer frame configurations and ball coupler sizes can be employed with the present invention. Also described and shown in this provisional is a non-rotating free end hydraulic piston device and method. Also described and shown is a coupling bushing device and method for securing a conventional coupler to piston rod.

The steerable coupling linkage (106) is provided between a primary unit (100) and a secondary unit (102) arranged in tandem to form an articulated vehicle (104). The steerable coupling linkage (106) includes a steering actuator mechanism (200) having a transversally disposed actuator (202). The steerable coupling linkage (106) is particularly well adapted when the articulated vehicle (104) must travel on difficult and rugged terrains. It is very compact and lightweight, and the units (100, 102) can be attached or detached very quickly even when they are not in alignment with one another.