Hamilton Sundstrand Corporation

Hamilton Sundstrand Coporation

George Kan

Donald E Army

Michael Zager

Charles J McColgan

Nigel Palmer

John M Dehais

Peter J Dowd

Kurt L Stephens

Joshua Kamp

Michael Spineti

Donald E Army Jr

Jr Donald E Army

Mccolgan Charles J J

A method of extending the lifetime of brazed primary hot inlet wavy fin structures of aircraft heat exchangers includes inserting slots in the fins. The slots increase the mechanical compliance of the fins as well as act as crack arrestors should a thermally induced fracture occur. In an embodiment, the slots are inserted by EDM.

Heat exchanger fin with crack arrestor

A plate fin heat exchanger is configured to receive hot flow from a hot source and cool flow from a cool source. The plate fin heat exchanger includes a plurality of plates arranged in parallel to define a plurality of flow passages there between, and a set of closure bars arranged at a first side of the plurality of plates to seal a first set of the flow passages against ingress of the hot flow, thereby directing the hot flow into a second set of the flow passages. Each respective closure bar includes an inner core formed of a first material having a first coefficient of thermal expansion and an outer cladding arranged about the inner core, the outer cladding formed of a second material having a second coefficient of thermal expansion. The first coefficient of thermal expansion is less than the second coefficient of thermal expansion.

Reduced thermal expansion closure bars for a heat exchanger

A plate fin heat exchanger includes a plate fin core having a plurality of plates defining a set of hot air passages extending from a hot air inlet region of the plate fin core to a hot air outlet region of the plate fin core and a set of cool air passages extending from a cool air inlet region of the plate fin core to a cool air outlet region of the plate fin core. The plate fin heat exchanger further includes a mounting flange circumscribing the cool air outlet region. At least a portion of the mounting flange has a plurality of heat transfer structures that extend into a flow path of cooling air exiting the cool air outlet region of the plate fin core.

Heat exchanger thermal fatigue stress reduction

A check valve housing is provided and includes a base having opposite sides which are configured to form linear contact surfaces with check valve flappers pivotably disposed on either side of the base, respectively, and an additional structural member having opposite sides which are configured to form additional contact surfaces with each of the check valve flappers, respectively.

High opening velocity check valve

A check valve () includes a valve housing () having at least one valve opening (). At least one petal () is located in the valve housing () and is configured to substantially cover the at least one valve opening () when the at least one petal () is in a closed position. The at least one petal () is rotable about a hinge axis () toward an open position thereby allowing fluid to flow through the at least one valve opening (). The check valve () includes at least one compliant petal stop (), () to prevent rotation of the at least one petal () beyond the open position.

Compliant check valve stop

Growing community of inventors

West Hartford, CT, United States of America

George Kan