Goodrich Corporation

Paul Vanderpol

Roque Panza-Giosa

Paul J Lavigne

Paul Lavigne

A method of implementing a heat treatment process for enhancing strength of a part is provided. The method includes applying, by a controller, a gas quenching process to enable a controlled operation for cooling the part wherein the part comprises a steel material wherein the controlled operation for cooling the part is a subsequent action in the heat treatment process applied after the steel material of the part has been heated to a critical temperature. Also, controlling, by the controller, the cooling of the steel material of the part in the gas quenching process by affecting of changes in a cooling rate over one or more increments of time for the cooling of the part that results in at least an increase in value of an Ultimate Tensile Strength (UTS) of the steel material in correspondence with a decrease in the cooling rate by the controller.

Method for increasing the ultimate tensile stress (UTS) and yield strength (YS) of high-strength martensitic steels

A shock strut includes a relief device that reduces the internal pressure within a sealed chamber of the shock strut when a load condition that exceeds a maximum operating load condition is encountered. The reduced pressure permits a telescopically moving piston of the shock strut to be received into a corresponding cylinder to an amount that increases the structural capability of the shock strut, especially with respect to applied side loads that generate bending and shearing stresses in the shock strut. In one embodiment, the reduced pressure permits the piston to 'bottom out' relative to the cylinder, which is a condition not otherwise achievable without the relief device. This additional stroke achievable by the piston reduces or eliminates the need to reinforce and thus add weight to the shock strut because of higher load condition design requirements.

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Brampton, Canada

Paul Vanderpol