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US 4,960,168 AGranted
Heat exchanger
OwnerRaymond L. Andersoninventor
Life of this patent
Estimating the term…
Abstract
A heat exchanger fan having a hollow central shaft. Hollow blades are formed on the central shaft and a peripheral flange is attached to the distal ends of the hollow blades. The interior of the shaft communicates with the interior of the blades, and openings at the distal ends of the blades extend through the peripheral flange.
Claims14
A heat exchanger fan comprising:
- a hollow central shaft;
- a plurality of hollow blades formed on the central shaft;
- a peripheral flange attached to the distal ends of the hollow blades;
- means communicating the interior of the shaft with the interior of the blades;
- opening at the distal ends of the blades extending through the peripheral flange;
- and
- at least one ancillary fan on the hollow central shaft, able to move from a first position, where it is locked on the shaft to be driven with the shaft, to a second position where it is not driven by the shaft.
4 more elements
A heat exchanger fan comprising:
- a hollow central shaft;
- a plurality of hollow blades formed on the central shaft;
- baffles within the hollow blades to direct air flow;
- a peripheral flange attached to the distal ends of the hollow blades;
- means communicating the interior of the shaft with the interior of the blades;
- and
- openings at the distal ends of the blades extending through the peripheral flange.
4 more elements
Dependencies are inferred from the claim text.