Embodiments of an adjustable panel assembly are disclosed. According to one embodiment, at least one adjustable articulating arm assembly connects a support elements having a plurality of equal sized side apertures to adjustable panel ends, providing an adjustable panel assembly with pivot hinges to rotate the adjustable panel about a common longitudinal axis for paired pivot hinges. Fixed top and side panels may be provided for each pair of corresponding support elements. Adjustable modular lighting and heating elements may be adapted between corresponding support elements to provide light or heat to a surface area below or within the panel assembly. The adjustable panel assembly components can be disassembled and/or collapsed into substantially flat shipping containers for ease of distribution and portability.

A food shield has shield panels that are location adjustable and angularly adjustable in respect of support structures (posts) that are coupled to a mounting surface, such as a surface of a buffet table or cart. For location adjustment of a shield panel along length of a post, a bracket assembly includes outer and inner collar portions, a grip element positioned between the outer and inner collar portions, and a tightening element that tightens the connection of the assembled collar against support posts. For angular adjustment, each bracket assembly includes an indexing base, a rotatable arm assembly with an indexing hub, and a removable or retractable coupling element. Side panels are mounted to the same posts as the shield panels with removable clamps that engage exterior surfaces of the posts. The removable clamps have multiple parts that are variously inverted for joining the clamps to posts at different orientations.

An adjustable breath guard includes a frame, a shield, and a hinge assembly. The hinge assembly includes a base fixedly coupled to the frame and a hinge body coupled to the shield. The hinge body is pivotally coupled to the base. The base is configured to engage the hinge body to prevent translation of the hinge body relative to the frame. The hinge assembly is reconfigurable between (a) an engaged configuration in which the hinge assembly limits downward movement of the shield and permits upward movement of the shield and (b) a disengaged configuration in which the shield permits both downward movement of the shield and upward movement of the shield. The hinge assembly is configured to change from the engaged configuration to the disengaged configuration in response to the shield moving upward.

The present system is directed to a modular apparatus that may be assembled and disassembled repeatedly without the use of tools. The modular system includes connectors that may be fixed to the underside of a plank and then engaged with leg portions. The connectors further include channels to accommodate retention members of additional attachments, such as covers, guards, signage, or racks that may be added onto the modular apparatus to increase its utility. The retention members mate with the connectors to connect and securely hold the attachment and can be removed from the connectors all without the need for tools.