Heating, ventilating and air-conditioning systems

Details Heating, ventilating and air-conditioning systems Heating, ventilating and air-conditioning systems

1993-03-22

1995-05-02

Joyce, Harold

Ventilation

Having inlet airway

Including specific air distributor

137601, 138 39, 251297, 403364, 411509, 411970, 411999, 454292, 454326, F24F 13062

Patent

active

054114381

ABSTRACT:
At an outlet of a heating, ventilating or air conditioning system air passes from the ducting through a plenum chamber, a damper provided with a set of blades which are movable between open and closed positions and a diffuser which directs the air in a desired direction. The plenum chamber is provided with internal vanes which act to guide a flow of air through the chamber between its inlet and outlet. The damper defines a plurality of predetermined blade positions between the open and closed positions and a resilient finger and teeth for retaining the blades in a selected one of said predetermined positions. The damper has a frame comprising a plurality of discrete frame elements interconnected at each corner joint of the frame by a friction fit pin passing through interdigitated projections on the frame elements. The diffuser is formed as a plurality of concentric portions which are each integrally formed with cooperating snap-fitting connections enabling the portions to be interconnected to form a complete diffuser. The blades for the damper have an integrally moulded body and a separate blade spindle received within a bore formed in the moulded body. The diffuser is mounted on a support connected to the plenum chamber by way of a fastening comprising an integrally formed head and shank which is threaded adjacent its free end, together with integrally formed resilient fingers for retaining the fastening in position on part of the diffuser whilst permitting rotation of the fastening.

REFERENCES:
patent: 2735352 (1956-02-01), Demuth
patent: 2928331 (1960-03-01), Averill
patent: 3107597 (1963-10-01), Person
patent: 3196895 (1965-07-01), Dayus
patent: 3495521 (1970-02-01), Foster
patent: 3812772 (1974-05-01), Kaiser
patent: 3836217 (1974-09-01), Shiina
patent: 4501193 (1985-02-01), Trigourea
patent: 4513655 (1985-04-01), Dayus
patent: 4665806 (1987-05-01), Martin, Sr.

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