A swivel trailer is described that can include a swivel hitch and swivel axle configuration which prevents a vehicle and trailer from jackknifing.

A weight distributing trailer hitch and associated method are described. The weight distributing trailer hitch can include a hitch portion for interfacing with a hitch receiver associated with a vehicle. The weight distributing trailer hitch can also include a ball portion to facilitate coupling with a tongue of a trailer. In one embodiment, the weight distributing trailer hitch can further include a spring bar vertically pivotal relative to the hitch portion, and an adjustment mechanism actuatable to selectively adjust a tilt angle of the spring bar relative to the hitch portion to vary preload on the spring bar and adjustably distribute weight of the trailer relative to the vehicle. In another embodiment, the weight distributing trailer hitch can further include a spring bar for distributing weight of the trailer relative to the vehicle, and a load measurement device to determine a magnitude of a downward force on the hitch ball.

A weight distributing hitch for towing a trailer includes a pair of deflection bars extending rearward from a ball mount head. A distal end of each deflection bar is supported by a deflection bar support connected to the frame by a height adjustable bracket assembly. A first resistance feature on the deflection bar support engages a second resistance feature associated with the deflection bar to restrain the deflection bar from sliding relative to the deflection bar support and thereby preventing swaying of the trailer relative to the towing vehicle. A longitudinal position of the second resistance feature relative to the deflection bar or a longitudinal position of the first resistance feature relative to said deflection bar supported by said deflection bar support is adjustable to position the second resistance feature in engagement with the first resistance feature when the deflection bar is supported on the deflection bar support.

A weight distribution system used with a hitch on a vehicle and a trailer, the weight distribution system comprising a moment bar with a forward end attached to the hitch so as to pivot about a generally vertical axis, the moment bar extending rearwardly along a center longitudinal plane of the trailer toward a rearward portion, the moment bar configured to exert a forward moment on the vehicle in response to an upward force on the rearward portion; a bracket attached to a trailer frame element, wherein the bracket is above the first rearward portion and further from the center longitudinal plane of the trailer than the rearward portion; and a tension member combined with a tension mechanism so as to increase and decrease a tensile force between the bracket and the rearward portion, to thereby increase and decrease the upward force on the rearward portion whereby sway of the trailer is reduced by biasing the system back to the centerline when the vehicle and trailer are out of alignment is disclosed.

A weight distributing trailer hitch and associated method are described. The weight distributing trailer hitch can include a hitch portion for interfacing with a hitch receiver associated with a vehicle. The weight distributing trailer hitch can also include a ball portion to facilitate coupling with a tongue of a trailer. In one embodiment, the weight distributing trailer hitch can further include a spring bar vertically pivotal relative to the hitch portion, and an adjustment mechanism actuatable to selectively adjust a tilt angle of the spring bar relative to the hitch portion to vary preload on the spring bar and adjustably distribute weight of the trailer relative to the vehicle. In another embodiment, the weight distributing trailer hitch can further include a spring bar for distributing weight of the trailer relative to the vehicle, and a load measurement device to determine a magnitude of a downward force on the hitch ball.

A weight distributing anti-sway trailer hitch has a pair of spring arms extending rearwardly from the head unit and a pair of hookup brackets for connecting a remote end of each spring arm to a trailer. The hookup brackets have a hookup plate and a hookup strap that sandwich a trailer frame therebetween to secure the bracket to the trailer, and further have a clamp that can be opened and closed to secure the remote end of the spring arm to the trailer frame during towing.

An automated guided vehicle includes a main frame (1) and a sub-frame (2); wherein, a driving wheel assembly (11) is mounted on the main frame (1), a driven wheel assembly (21) or a driving wheel (11) is mounted on the sub-frame (2), and the main frame (1) is hinged to the sub-frame (2).

An automated guided vehicle includes a main frame (1) and a sub-frame (2); wherein, a driving wheel assembly (11) is mounted on the main frame (1), a driven wheel assembly (21) or a driving wheel (11) is mounted on the sub-frame (2), and the main frame (1) is hinged to the sub-frame (2).

A weight distributing hitch for towing a trailer includes a pair of deflection bars extending rearward from a ball mount head. A distal end of each deflection bar is supported by a deflection bar support connected to the frame by a height adjustable bracket assembly. A first resistance feature on the deflection bar support engages a second resistance feature associated with the deflection bar to restrain the deflection bar from sliding relative to the deflection bar support and thereby preventing swaying of the trailer relative to the towing vehicle. A longitudinal position of the second resistance feature relative to the deflection bar or a longitudinal position of the first resistance feature relative to said deflection bar supported by said deflection bar support is adjustable to position the second resistance feature in engagement with the first resistance feature when the deflection bar is supported on the deflection bar support.

A clearance-measuring break-away pintle hitch includes a mount having a first end for coupling to a vehicle. A pintle body has a portion thereof aligned with and coupled to a second end of the mount by a shear pin. Gauge members are pivotally coupled along a common axis of rotation to the pintle body. Each gauge member is rigid and has a unique length measured from the common axis of rotation. Each gauge member is independently rotatable about the common axis of rotation.