Lau Industries, Inc.

Itt Automotive Electrical Systems, Inc.

Lau Holdings, LLC

Michael Brendel

John R Savage

Michael J Neely

James L E Meats

Mark Allen Gerken

Timothy Schrand

Michael Joseph Neely

A fan assembly includes a first fan, a second fan, and a controller. The controller is configured to determine that an air movement demand corresponds to operation of the first fan and the second fan at a resonance speed, instruct the first fan to operate at a first speed which is less than the resonance speed, and instruct the second fan to operate at a second speed which is greater than the resonance speed.

Multi-fan assembly control

A blower wheel comprising a centerdisk comprising a conical portion (), a planar portion () for receiving a hub (), and an arcuate portion () intermediate the conical portion and an outer portion (), a plurality of blades () connected to the outer portion, the blades further connected to a ring (), and a hub connected to the planar portion, the hub comprising a fastener () for attaching the centerdisk to a shaft ().

Blower wheel

A forward swept centrifugal fan wheel comprising a first endring (), a second endring (), a plurality of blades () connected between the first endring and the second endring, each blade having a substantially continuous arcuate form extending along an axis parallel to an axis of rotation (A-A), and each blade having a substantially continuous arcuate cross-section taken with respect to a plane which extends normally from the axis of rotation (A-A).

Forward swept centrifugal fan wheel

This centrifugal blower fan wheel has extruded-aluminum airfoil blades. The preferred blades have two hollow regions, separated by an angled mid-load support beam, inside the blade. The nose section of the blade (at the leading edge) and the tail section of the blade (at the trailing edge) have open semi-circular grooves which face the adjacent hollow sections and are designed to accept thread cutting or thread forming screws for attachment of the blade to a ring-shroud and back-plate.

Airfoil blade and method for its manufacture

A blade for a vehicle engine-cooling fan assembly. The blade combines a particular distribution of four, key, blade-design parameters--planform sweep, airfoil chord, maximum airfoil camber, and airfoil pitch angle--to achieve a fan assembly having high pumping, high efficiency, and low noise. Specifically, the blade has a planform with a forward sweep angle continuously increasing in absolute value along the span from the root to a maximum absolute value not exceeding about 15 degrees at the tip. The airfoil of the blade has a chord that continuously increases from the root to the tip, a maximum camber that continuously decreases from a value not greater than about 12% of chord at the root to a value not less than about 5% of chord at the tip, and a solidity not greater than about 1.1 at the root and not less than about 0.5 at the tip. The pitch angle of the airfoil of the blade defines three, separate regions: (a) a first region in which the pitch angle continuously decreases from the root, where the pitch angle has a value not exceeding about 120% of the tip pitch angle, to about the 1/2-span location; (b) a second region in which the pitch angle continuously increases from about the 1/2-span location, where the pitch angle has a value not less than about 80% of the tip pitch angle, to about the 7/8-span location; and (c) a third region in which the pitch angle continuously decreases from about the 7/8-span location, where the pitch angle has a value not exceeding about 105% of the tip pitch angle, to the tip.

High-pumping, high-efficiency fan with forward-swept blades

A vehicle engine-cooling fan assembly for circulating air to cool an engine. The fan assembly has a central hub with a plurality of blades extending radially outward from the central hub. Each blade has a root joined to the central hub, a tip, and a span formed between the root and the tip. The blades are spaced circumferentially from each other, by unequal spacing angles, around the central hub. The unequal spacing angles minimize noise produced by the fan assembly. The blades are positioned at a radial location along a blade span by unequal setting angles which increase the efficiency of the fan assembly. The blades can have either a straight or a curved planform. Mechanical energy is imparted to the fan assembly from an electric motor, a hydraulic motor, or some other source. Also disclosed is a process for designing a vehicle fan assembly combining unequal fan blade spacing angles and unequal fan blade setting angles.

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Centerville, OH, United States of America

Michael Brendel