Abstract: The disclosure relates to a mobile dental delivery system designed for enhanced serviceability and maintenance. The system features a housing defining an upper service chamber, a middle service chamber, and a lower service chamber, each having an access panel, door, or the like configured to selectively reveal the associated chamber for servicing the components therein as desired. The system further includes a compressor service assembly removably disposed within the lower service chamber and connected via tubing/wires to components within the housing. The tubing/wiring between the compressor service assembly and the other components of the mobile dental delivery system are of a sufficient length to allow the complete removal of the compressor service assembly from the housing, while maintaining the tubing connection to the other components, to facilitate 360-degree access to the elements of the compressor service assembly such as a compressor or a pressure switch.

Abstract: A fastener for releasably securing a first substrate to an apertured second substrate includes a base member and a locking member mounted for rotation relative to the base member. The locking member is rotatable between an insertion position for insertion of the base member and locking member through the aperture formed in the second substrate and a locking position for releasably securing the first and second substrates together. A resilient member is provided to bias the locking member toward the base member when the resilient member is compressed. The locking member includes at least one protrusion and the base member includes at least one detent. The detent and protrusion are configured to releasably engage each other in the insertion position of the locking member and disengage from each other upon rotation of the locking member toward the locking position.