Patent ID: 11892190
Assignee: DUST FREE, LP
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 3:
4. The heating, ventilation and air conditioning air conveyance apparatus of claim 3, wherein each first quadrilateral panel right-angle flange further comprises a right-angle flange screw receptive pilot hole defined through the first quadrilateral panel right-angle flange, the right-angle flange screw respective pilot hole spaced to align with the screw receptive pilot hole defined through the projecting lip when the first quadrilateral panel right-angle flange is received in the hemmed cleat slot defined by the projecting lip, and the right-angle flange screw respective pilot hole sized to threadably receive the fastener to form the heating, ventilation and air conditioning air conveyance apparatus.