Honeywell International Inc.

Alliedsignal Inc.

Lowell W Pearson

John J Stanko

This invention overcome the disadvantage of the prior systems and produces a high velocity specially formed and constituted pressure aerodynamic stream for efficiently and effectively removing ice from an aircraft. The specially formed stream includes a stream within a stream, wherein a deicing fluid such a glycol is entrained within and encased by a surrounding jacket of entraining fluid such air. This deicing is now known as coaxial stream/stream within a stream deicing. The special nozzle allows the stream to maintain fluid separation over its flight path so that aircraft contact is made by to be known as coaxial stream/stream within a stream deicing. The coaxial stream/stream within a stream deicing is further enhanced by pressurizing the stream to deliver the stream as a high pressure high velocity stream to improved the aerodynamic sweeping action of the airstream.

Hybrid deicing system and method of operation

A hybrid deicing system for deicing ice or snow covered surfaces comprises a source of pressurized air and a source of pressurized deicing fluid. A nozzle assembly receives the pressurized air and the pressurized deicing fluid at a forward position, a middle position or a rearward position of the nozzle assembly. The nozzle assembly discharges the pressurized deicing fluid and pressurized air as a first independent stream within a second independent stream.

This invention overcomes the disadvantage of the prior systems and produces a high velocity specially formed and constituted pressure aerodynamic stream system for efficiently and effectively removing ice from an aircraft. The specially formed stream system includes a stream within a stream, wherein a deicing fluid such a glycol is entrained within and encased by a surrounding jacket of entraining fluid such as air. This deicing is now known as coaxial stream/stream within a stream deicing. The special nozzle allows the stream to maintain fluid separation over its flight path so that aircraft contact is made by to be known as coaxial stream/stream within a stream deicing. The coaxial stream/stream within a stream deicing is further enhanced by pressurizing the stream to deliver the stream as a high pressure, high velocity stream to improve the aerodynamic sweeping action of the airstream.

A cover is affixed to a turbine housing on the downstream side of a turbine wheel rotating assembly to reduce a pumping loss inherently caused by a pressure gradient created by the turbine wheel blades when the turbine wheel rotates. A portion of an annular area on the exit face of the turbine wheel is left open for gas flow out of the blades being fed by the turbine nozzle or nozzles, with the remaining annular portion being covered with a close axial clearance with the turbine wheel rotating assembly to reduce the pumping loss.

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Hermosa Beach, CA, United States of America

Lowell W Pearson