Abstract: A bed liner for pick-up trucks incorporating the features of multi-component construction, releasable connection with the side-walls, and an integral, nonintrusive cargo restraint capability. Specifically, the bed liner is composed of a durable, resilient material with individual panels for each longitudinal side-wall, floor, front wall and tail gate of the pick-up truck bed. The bed liner panels are secured to the pick-up truck bed by a releasable system, such as VELCRO, which is a registered trademark for a hook and loop fastener system. Each interior surface of the bed liner panel is provided with a series of regularly spaced, vertically oriented grooves. Cargo restraint is achieved by selectively inserting a planar retaining member, such as a predetermined number of stacked 2.times.4's, into opposing grooves on opposite sides of the bed. This may be either longitudinal between the front wall and the tailgate, or transverse between the side-walls.

Abstract: In a central hydraulic system for marine deck machinery, fixed displacement hydraulic motors are utilized to drive anchor winches and standard mooring winches, and variable displacement hydraulic motors are utilized to drive automatic mooring winches. This permits individual regulation of the line pull or tension of the mooring line of each automatic mooring winch. Variable displacement pressure compensated over center pumps are utilized to supply hydraulic fluid for operating the hydraulic motors by means of a closed loop circuit, and charging pumps are utilized to supply hydraulic fluid at charging pressure.Infinitely variable volume pressure compensated pilot operated four-way directional valves are used to regulate the flow of hydraulic fluid from the variable displacement pressure compensated over center pumps to the hydraulic motors, thereby regulating the speed of operation of each hydraulic motor and the marine deck winch driven thereby.