Abstract: A safety device for maintaining a load raised cylinder linkage in selected extended position. A combination cylinder engagement rod and locking sleeve with a piston rod engagement channel that will adjustably secure and extended piston rod from a cylinder assembly in a safe secure locked extended position. The cylinder safety stop of the invention is interposed between the cylinder sleeve and the piston end block by the incrementally adjustable engagement panel's positioning via removably positioned stop adjustment pin. An intermediate incrementally adjustable fitting provides for positioning between multiple aligned stop pin engagement apertures.

Abstract: There is disclosed an apparatus and method for moving with an excavator arm a trench box having a pair of adjacent spreader bars at a forward end. The apparatus has a bracket end for connecting to the excavator arm and a hooking fork. The hooking fork has a first surface that engages the first spreader bar of the trench box. The apparatus also includes a second surface for engaging the adjacent second spreader bar when used to lift the trench box from the trench or move the trench box along the trench floor.

Abstract: A lift rail system for industrial use combining modular universal rail units that are secured to one another to required length suspended from fully adjustable rail support posts that can be easily moved to needed locations. The rail units are formed from identical rail sections secured together in face to face relation by multiple fasteners forming both guide rails and interconnecting lift beam therebetween.

Abstract: Modular trench box sheeting panels for use in wall supporting during the excavation of trenches or the like. A rectangular support frame is formed by a pair of sheeting support members secured to one another by pairs of spreader members at oppositely disposed ends thereof. The box sheeting panels of the invention are formed of modular interdependent structural shapes that are assembled in a modular fabrication method to form interengageable adjustable wall sheeting panel members with reinforced pounding plates and ground engaging knife edges.

Abstract: A method and apparatus for constructing modular trench box sheeting panels for use in wall supporting during the excavation of trenches or the like. A rectangular support frame is formed by a pair of sheeting support members secured to one another by pairs of spreader members at oppositely disposed ends thereof. The box sheeting panels of the invention are formed of modular interdependent structural shapes that are assembled in a modular fabrication method to form interengageable adjustable wall sheeting panel members with reinforced pounding plates and ground engaging knife edges.