Abstract: A seal assembly for use between an inner shaft and an outer shaft rotatable about a common axis within a turbine engine includes a pair of end rings and a plurality of seal elements coupled between the pair of end rings. Each end ring includes a flange extending in an axial direction, and each seal element includes a pair of shoulders extending in opposing axial directions. The seal assembly also includes a pair of retaining rings. Each retaining ring is positioned between one shoulder of the pair of shoulders and a corresponding one end ring flange of the pair of end ring flanges.

Abstract: One embodiment describes a bearing damper including a housing; a damper with an annular gap and an internal spring, in which the annular gap is formed between an inner rim and an outer rim of the damper, the internal spring circumferentially bounds the annular gap, the outer rim is coupled to the housing, and the annular gap is configured to be filled with fluid used to dampen vibrations produced on a drive shaft; and an external spring coupled to the housing and to the inner rim, in which the external includes an axial stiffness engineered to externally offset axial forces exerted on the inner rim of the and a radial stiffness engineered to externally offset a first portion of radial forces exerted on the inner rim and to permit a second portion of the radial forces to propagate the vibrations from the drive shaft to the inner rim.

Abstract: Adhesive compositions and patches, and associated systems, kits, and methods, are generally described. Certain of the adhesive compositions and patches can be used to treat tissues (e.g., in hemostatic or other tissue treatment applications), according to certain embodiments.

Abstract: An electrical device including a structure having a plurality of dielectric layers, the structure further having a plurality of vertical electrical connections extending from a top layer of the dielectric layers to a bottom layer of the dielectric layers, a first vertical electrical connection of the plurality of vertical electrical connections including a first capacitive structure that extends in a plane perpendicular to a vertical dimension of the vertical electrical connection, wherein the first capacitive structure is disposed on a first dielectric layer of the plurality of dielectric layers, wherein the first dielectric layer is below the top layer, and a second vertical electrical connection of the plurality of vertical electrical connections including a second capacitive structure extending in the plane and disposed on the first dielectric layer.

Abstract: A protective case for a portable computing device in accordance with one example includes a cavity in the case to be a plurality of electronic devices. The cavity includes a first recess to receive a first electronic device and a second recess to receive a second electronic device. The case also includes a cover removably coupled to the cavity.

Abstract: A gas turbine engine is provided defining a radial direction. The gas turbine engine generally includes a compressor section and a turbine section, the compressor section and turbine section together defining a core air flowpath. The gas turbine engine also includes a sump positioned inward of the core air flowpath along the radial direction. An air pump is positioned inward of the core air flowpath along the radial direction for providing a flow of air from the sump to lower an internal pressure of the sump and reduce a likelihood of lubrication leaking from the sump.

Abstract: A gas turbine engine having a core engine. The core engine includes an inlet, a compressor section, a combustion section, a turbine section, and an exhaust. The gas turbine engine also includes a bearing sump arranged in the core engine for containing lubrication, the bearing sump and lubrication having an operational range between at least about 0° F. and about 550° F.

Abstract: A system for managing thermal transfer in at least one of an aircraft or a gas turbine engine includes a first engine system utilizing an oil for heat transfer. The oil of the first system has a temperature limit of at least about 500° F. The system additionally includes a fuel system having a deoxygenation unit for deoxygenating fuel in the fuel system, as well as a fuel-oil heat exchanger located downstream of the deoxygenation unit. The fuel-oil heat exchanger is in thermal communication with the oil in the first engine system and the fuel in the fuel system for transferring heat from the oil in the first engine system to the fuel in the fuel system.

Abstract: A system for managing thermal transfer in at least one of an aircraft or a gas turbine engine includes a first engine system utilizing an oil for heat transfer. The oil of the first system has a temperature limit of at least about 500° F. The system additionally includes a fuel system having a deoxygenation unit for deoxygenating fuel in the fuel system, as well as a fuel-oil heat exchanger located downstream of the deoxygenation unit. The fuel-oil heat exchanger is in thermal communication with the oil in the first engine system and the fuel in the fuel system for transferring heat from the oil in the first engine system to the fuel in the fuel system.

Abstract: A sports training device for pitching and throwing has a ball core and a cover material. The core member defines a passageway extending through the ball core and also defines an anchor recess into a surface of the ball core. The anchor recess is aligned with and communicates with the passageway. A cloth member has a geometric shape with at least one corner and defining an attachment portion and a body portion extending away from the attachment portion. The attachment portion extends through the passageway and is attached to an anchor member sized to be received in the anchor recess. A cover material is installed over the ball core with the body portion of the cloth member extending through a cover opening and out from the ball core.

Abstract: A self-contained lubrication fluid circulation system for use with a gas turbine engine defining a core air flowpath includes a sump configured to collect lubrication fluid and a heat source coupled in fluid communication with the sump and configured to transfer heat to the lubrication fluid. The system also includes a heat sink positioned within the sump and coupled in fluid communication with the heat source. A lubrication fluid conduit of the system is configured to channel the lubrication fluid between the heat source and the heat sink, wherein the lubrication fluid conduit is positioned entirely within the sump.

Abstract: A bearing apparatus includes: a bearing including a first race rotatable relative to a second race, wherein the first race includes one or more drain passages extending therethrough; and a squeeze film damper connected to the first race, the squeeze film damper including first and second squeeze film spaces separated by an oil drain path which communicates with the one or more drain passages of the first race.

Abstract: Apparatus and methods for cooling a mixture of hot gas and liquid received from a compressor and simultaneously separating the gas from the liquid, the apparatus comprising a receiving inlet, a header unit, a collector, and a plurality of conduits comprising turbulators which creates turbulence and heat-exchange surfaces to simultaneously separate the liquid from the gas and cooling both the liquid and the gas, and the method comprising receiving the mixture from the compressor through a receiving inlet; directing the mixture into a plurality of conduits; and in each of the plurality of conduits, simultaneously separating the liquid from the gas and cooling both the gas and the liquid.

Abstract: Techniques and apparatus for controlling the distribution of power (e.g., current) and the temperature to individually accessible compartments enclosing subsystems of a personal communication structure (PCS) is described. The PCS includes a power distribution and temperature controller subsystem, including thermal sensors adapted to generate and transmit temperature measurement data to the temperature controller, which controls fans/blowers. The power distribution subsystem senses and controls the current delivered to the individually accessible compartments.

Abstract: Techniques and apparatus for controlling access to a personal communication structure (PCS) are described. The PCS may include independently accessible compartments at least partially enclosing respective subsystems of the PCS. The independently accessible compartments include an electronics compartment, a communications compartment, and a display compartment. The electronics, communications, and display compartments at least partially enclose a power distribution subsystem, a communications subsystem, and a display subsystem, respectively. The PCS also includes an access controller operable to provide access independently to respective interiors of at least a subset of the compartments to authorized users.

Abstract: A sports training device for pitching and throwing has a ball core and a cover material. The core member defines a passageway extending through the ball core and also defines an anchor recess into a surface of the ball core. The anchor recess is aligned with and communicates with the passageway. A cloth member has a geometric shape with at least one corner and defining an attachment portion and a body portion extending away from the attachment portion. The attachment portion extends through the passageway and is attached to an anchor member sized to be received in the anchor recess. A cover material is installed over the ball core with the body portion of the cloth member extending through a cover opening and out from the ball core.

Abstract: In one aspect, the present disclosure is directed to a bearing compartment sealing system including a bearing for supporting a shaft. A housing encloses the bearing and defines a compartment for holding lubricant therein. At least two seals are located between the shaft and the housing. The at least two seals, the housing, and the shaft collectively enclose the compartment. Only one of the at least two seals is a hydrodynamic seal.

Abstract: Adhesive compositions and patches, and associated systems, kits, and methods, are generally described. Certain of the adhesive compositions and patches can be used to treat tissues (e.g., in hemostatic or other tissue treatment applications), according to certain embodiments.

Abstract: Adhesive compositions and patches, and associated systems, kits, and methods, are generally described. Certain of the adhesive compositions and patches can be used to treat tissues (e.g., in hemostatic or other tissue treatment applications), according to certain embodiments.

Abstract: A gas turbine engine is provided defining a radial direction. The gas turbine engine generally includes a compressor section and a turbine section, the compressor section and turbine section together defining a core air flowpath. The gas turbine engine also includes a sump positioned inward of the core air flowpath along the radial direction. An air pump is positioned inward of the core air flowpath along the radial direction for providing a flow of air from the sump to lower an internal pressure of the sump and reduce a likelihood of lubrication leaking from the sump.