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US 4,098,008 AGranted
Dry kiln having bidirectional air flow with unidirectional fan rotation
AssigneeWellons, Inc.
InventorsHenry W. Schuette, Martin N. Nye
Life of this patent
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Abstract
In a dry kiln, a plurality of in-tandem air control compartments and a fan between each pair of adjacent compartments. The fans are rotated in one direction only. The compartments have lateral air flow ports in which air valves are mounted. The fans are of opposite pitch and the valves are so alternately operated that although the fans blow the air unidirectionally, the air can be controlled to flow in one direction through the drying chamber of the kiln, or optionally in the opposite direction, for uniform drying purposes.
Claims5
In a dry kiln having a drying chamber,
- means defining plural, in-tandem, air control compartments for controlling the flow of air to said drying chamber,
- a fan mounted between each pair of compartments,
- means for rotating said fans in one direction only,
- adjacent fans having blades of opposite pitch so that the fans drive air from certain compartments into adjacent compartments,
- said compartments each having a pair of air flow ports for ingress and egress of air,
- a valve for each port,
- and control means for opening the valves of one of a pair of flow ports while closing the other, and vice versa to achieve directional control of the air entering and leaving said compartments.
4 more elements
Dependencies are inferred from the claim text.