US Patent 10330240 Mounting assembly

A mounting apparatus including a base with a perimeter edge having at least one depression formed therein. A mounting plate can be detachably coupled with the base and have a corresponding perimeter edge with at least one displaceable protrusion formed thereon. The displaceable protrusion can have a biasing element configured to bias the displaceable protrusion away from the corresponding perimeter. At least a portion of the base perimeter edge is configured to compress the biasing element during rotation of the mounting plate relative to the base, thereby displacing the displaceable protrusion and wherein the displaceable protrusion is configured to engage the at least one depression.