Abstract: A sprocket fits over a portion of or is fixedly coupled to a tarp shaft around which a trailer tarp is rolled. The sprocket includes a transverse bore for receiving an end of a crank rod, which is spring-biased to engage pins through the crank rod end with one of two sets of grooves in the sprocket surface surrounding the transverse bore. The crank can therefore be moved between a deployed position for use and a stowed position for travel. The opposite end of the sprocket includes projecting locking teeth for engaging with a locking mechanism preventing rotation of the sprocket and tarp shaft. Optionally, pawls may operate with the locking teeth to provide bidirectional ratcheting.

Abstract: A ball hitch coupler includes a body having a socket therein, the socket sized for receiving a ball on a ball hitch. The body includes an opening through an upper surface of the body into the socket. A latch release is pivotably mounted on the upper surface of the body, and may include a drain hole or trough forming a catch for tips of the latch release when in the open position. A latch rod extends through the opening through the upper surface of the body and connected at a first end that is external to the body to the latch release. A latch is secured to a second end of the latch rod inside the socket, the latch including a tab projecting from a rear surface of the latch and received by a slot within the body to guide movement of the latch.