Abstract: A hydraulic retractable and extensible tandem wheel suspension for a food service concession trailer for lowering the trailer to a position adjacent the ground to position the serving area of the trailer at a position convenient to a customer, and for raising the trailer for transportation to a desired location.

Abstract: A wheel suspension system for special event trailers is constructed in two opposite side laterally narrow and compact units attached to the lower perimeter frame of the trailer body. The trailer body is elevated to a transport position and lowered to a stable ground level position convenient for customers by the operation of horizontally movable cam lift plates powered by horizontal axis hydraulic cylinders in cooperation with vertical axis carriage plates having cam followers. Longitudinal leaf springs rockably mounted on the carriage plates have lost motion connections with tandem wheel axles carried by crank arms pivotally attached to the lower perimeter frame.

Abstract: A heavy-duty picnic table folds into a compact form for shipment or storage. Two folding end frames which mount a table top and opposite side benches fold in unison when locking pins are removed from two cross braces which maintain the table securely in an erected state. Operational parts are tethered to prevent separation and loss. The table is characterized by strength and stability.

Abstract: A support base for merchandise display racks particularly of the revolving type knocks-down easily for compact shipment and storage without sacrifice of strength and durability when assembled for use. The parts fit together without the need for tools and only a single locking set screw requires tightening. A double telescoping sleeve arrangement imparts strength and stability to the support base. Manufacturing cost is minimal.