Abstract: A maintenance and retrieval cart is provided for use with a push back storage rack having a plurality of nested trays riding on a pair of inclined rails. The maintenance and retrieval cart comprises a base with a safety rail secured thereto. The base is supported on an undercarriage which facilitates movement along the inclined rails. A drive mechanism is operatively connected to move the cart along the inclined rails.

Abstract: A bumper assembly for use at a loading dock comprises a resiliently compressible pad protected by a readily replaceable metal faceplate. The bumper assembly has certain metal components that move relative to each other as the bumper assembly is compressed by a vehicle backing into the dock. Those metal components are spaced apart from each other to avoid metal-to-metal frictional wear. In some cases, the compressible pad has internal cavities that help reduce the extent to which the core bulges under compression.

Abstract: A pit form comprising two substantially parallel side members having two ends and a substituting perpendicular rear member extending between proximate the same ends of the side members in use, each of the side members and the rear member having compatible male and female engaging portions to interconnect said members to form said pit form.

Abstract: A loading dock bumper comprising:(a) a first rigid part for fastening to said dock(b) a second rigid part engaged with said first rigid part by at least one connecting device, said second rigid part being moveable with respect to said first rigid part between a first and a second position, and said first and said second rigid parts when engaged defining a substantially enclosed hollow therebetween; and(c) a compressible resilient material dispersed between said first and second rigid parts within the hollow therebetween,wherein said second part is moveable with respect to the first part between the first position wherein the resilient material is not compressed and the second position wherein said resilient material is compressed, wherein any load applied to said bumper moves the second part towards the second position and compresses the resilient material to provide dampening of the load applied.

Abstract: A loading dock bumper comprising:(a) a first shell made of a substantially non-elastic material(b) a second shell made of a substantially non-elastic material, said first and said second shells being resiliently attached to each other, forming a housing, and(c) a predetermined effective amount of a particulate resilient material contained within said housing formed by said first and said second shell in a substantially compressed mode.