US Patent 7293667 Height adjustable shelf clamp

A modular shelf assembly has a vertical support having a channel in one face thereof and an adjustable bracket having a rear portion cooperatively configured and slidable in the channel. The bracket includes top and lower clamps each having a body portion with opposed clamping surfaces and depending leg portions. The leg portions are slidable relative to each other, and an adjusting screw is engaged with the upper clamp to effect relative movement between the clamping surfaces to clamp a shelf between the clamping surfaces. The bracket also has a positioning fastener seated in the lower clamp below the shelf and extending through the clamps to engage the support to secure the clamps to each other and to the support.