Abstract: The ball clamp coupler includes a coupler housing wherein a coupler socket is defined, with the coupler socket having a bottom socket opening to allow insertion of a hitch ball. A rear wall is also defined within the coupler housing interior adjacent the coupler socket. A ball clamp moves within the interior of the coupler housing between an open (uncoupled) state wherein the ball clamp is substantially removed from the coupler socket, and a closed (coupled) state wherein the ball clamp is substantially inserted within the coupler socket. During such motion, the ball clamp is guided against the rear wall, whereby engagement of the hitch ball will situate the ball clamp between the hitch ball and the rear wall. The ball clamp is driven by a clamp driving member which extends from the interior of the coupler housing to its exterior.

Abstract: An adjustable gooseneck coupler for connecting a trailer to a towing vehicle. The trailer includes a front overhang from which the gooseneck coupler depends. The towing vehicle includes a bed having a ball selectively received within a ball housing of the coupler. The gooseneck coupler includes telescopingly adjustable inner and outer tubes to adjust the length of the gooseneck and therefore the height of the trailer overhang relative to the truck bed. The adjustable inner and outer tubes are locked against relative movement by clamping screws. The clamping screws are arranged on the outer tube in longitudinal pairs at a triangular orientation to maximize the clamping force.

Abstract: A ball clamp trailer coupler for engaging a standard vehicle hitch ball includes a coupler housing wherein a forward coupler socket is defined, and a ball clamp which is movably situated within the coupler housing rearwardly of the coupler socket. The clamp has a clamping face which faces the coupler socket, and the clamping face slopes downwardly as it extends forwardly to conclude at a frontwardly-protruding lower clamping face edge. The clamp also includes a ramp face which slopes downwardly and rearwardly from the lower clamping face edge. When the coupler is lowered onto a hitch ball with the coupler located too far forwardly, i.e., so that the hitch ball is situated beneath the clamp, the hitch ball will contact the ramp face to push the clamp rearwardly out of the coupler socket rather than into the coupler socket (as will occur where the ramp face is not present).

Abstract: This document describes a drop foot jack, also known as a vehicle landing gear or landing gear jack. A drop foot is telescopically borne within an inner sleeve, which is in turn telescopically borne within an outer sleeve. A rotatable screw is situated within the outer sleeve, and it engages the top surface of the inner sleeve so that rotation of the screw will move the outer sleeve and inner sleeve with respect to each other. The drop foot, inner sleeve, and outer sleeve preferably each have a circumference having multiple discrete sides, e.g., each may have a polygonal cross-section. Apertures are spaced along the lengths of the drop foot and the inner sleeve, and a latch plate having a generally planar configuration which can be selectively moved into aligned apertures in the inner sleeve and the drop foot to thereby engage the drop foot with respect to the inner sleeve.