Aerodynamic shape with improved lift characteristics

Details Aerodynamic shape with improved lift characteristics Aerodynamic shape with improved lift characteristics

1986-05-23

1987-04-07

Joyce, Harold

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

98116, 1375121, F24F 1315

Patent

active

046551220

ABSTRACT:
An improved aerodynamic shape comprises an essentially planar face portion and leading and trailing edges associated with opposing ends of the face portion to develop a cross-sectionally inverted, pan-shaped enclosure. In conjunction with a damper including a frame and one or more blades pivoted for rotation within the frame, blades provided with the aerodynamic shape of the invention develop increased lift when forced open by escaping air, permitting the blades to be constructed of relatively heavy gauge materials without comprising damper efficiency.

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Back Draft Damper Catalog Sheet (Prefco Products, Inc.).

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