Systems are provided for assisting in towing a trailer by a lead vehicle. A wheeled tow assist unit couples between the lead vehicle and the trailer. A drive unit onboard the tow assist unit drives the wheels in response to a force between the trailer and the tow assist unit. The tow assist unit bears at least a portion of the force required to tow the trailer.

A spring bar coupling device is described for coupling a spring bar of a weight distributing trailer hitch to a trailer frame. The spring bar coupling device can include a spring bar support operable to interface with and support a spring bar of a weight distributing trailer hitch. The spring bar support can have a vertical support arm having a first coupler opening, and a lower spring bar stop extending from the vertical support arm to provide a lower interface for the spring bar. The spring bar coupling device can also include a channel bracket having at least two opposing walls defining a vertically oriented channel operable to receive the vertical support arm, and a second coupler opening in at least one of the two walls. The first and second coupler openings can be configured to be aligned with one another at a first coupling location when the vertical support arm is located at least partially within the vertically oriented channel. In addition, the spring bar coupling device can include at least one coupler operable to extend into the first and second coupler openings to couple the spring bar support to the channel bracket.

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 distribution system is shown and described. The weight distribution system may include a spring arm configured to be operatively engaged between plate members of a ball mount, and a pin member inserted into the spring arm, the pin member configured to secure the spring arm with the ball mount. The weight distribution system may also include an attachment mechanism configured to selectively place the spring arm in mechanical communication with a towed vehicle.

A trailer force measurement system includes a tow hitch, a hitch mount connected to the tow hitch and a spring bar connected to the hitch mount. The trailer force measurement system also includes a trailer having a frame, where the spring bar is connected to the trailer frame via a bracket. A hitch coupler is then connected to the trailer frame and configured to releasably couple the trailer frame to the hitch mount. A force measurement device is then disposed on the bracket and configured to measure force exerted on the bracket by the spring bar.

An improved weight distribution hitch having a pair of improved torsion brackets that are configured for vertical dynamic adjustment of the torsion arms relative to the towed vehicle, or trailer, frame. Each torsion bracket has a frame bracket that mounts to the A frame of a trailer. The frame bracket fixedly mounts to the A frame of the trailer. A torsion arm bracket is connected to the frame bracket and configured for vertical movement within the frame bracket to adjust the relative position of the torsion arms to the frame bracket, and thus the A frame of the trailer. The actuator preferably is an actuator bolt that is positioned through the frame bracket, and configured to rotate. The actuator bolt is threadingly engaged with the torsion arm bracket such that rotation of the actuator bolt vertically moves the torsion arm bracket relative to the frame bracket.

A trailer hitch system for a vehicle such as a car, truck, or SUV, and trailer comprising an overcab portion substantially parallel to a roof of the truck. The overcab portion comprises a roof connector located generally equidistant from either lateral side of the roof and is aligned with a door pillar, and a hitch for connecting the trailer. The overcab portion further comprises a forward frame portion extending from the overcab portion with a forward frame connector and a rearward frame portion extending from the overcab portion with a rearward frame connector, both of which connect to the frame of the vehicle.

A trailer hitch is disclosed. A weight distribution hitch includes an attachment member with a forward end which attaches to a vehicle and a rearward end which pivotally connects to a trailer. The invention also includes a moment bar which attaches to the attachment member on one and tension mechanism on the other. The tension mechanism is mounted on a frame of the trailer and provides an upward force on the moment bar which imposes a moment on the attachment member. Center lines of the attachment member, moment bar, and the vehicle are all in a vertical plane. The invention may also include an aperture disposed in the moment bar through which the tension mechanism passes.

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.

A hitch is provided including a tongue, an insert, and a base. The tongue includes a C-shaped section having an internal spherical raceway and opposing walls, each extending from an opposite arm of the C-shaped section. The insert includes a spherical segment received within the internal spherical raceway and having a draw pin hole, and a projection extending rearward between the opposite arms of the C-shaped section and having a socket recess. The base being pivotally connected to the tongue through the opposing walls. The base includes a ball located in front of the pivotal connection, the ball being received within the socket recess of the insert, and a back end being adapted for connection to a towing implement.