A vehicle battery jump starter with air pump device includes a vehicle battery jump starter and an air pump disposed within a cover. An internal battery is also disposed within the cover and connected to the vehicle battery jump starter and the air pump. A port is provided so as to provide connection to the device from an external vehicle battery. The air pump is configured such that it is powered by the external battery in a first mode of operation.

A rotating machine includes a hub portion, wherein the hub portion comprises a forward face and an aft face. The rotating machine further includes a cooling channel formed on either the forward face or the aft face and configured to direct cooling air to a location on the rotating machine, wherein the cooling channel extends from a radially inner location along the face to a radially outer location along the face, and wherein the cooling channel is configured as a recess formed into an outer surface of the face.

There is provided an appliance including a base having a housing, a motor-fan assembly disposed in the housing, a working implement which is operated by the motor-fan assembly when energized, a pocket integrally formed in a sidewall of the housing configured for use as a carrying handle, and one or more apertures formed in the pocket configured to allow cooling air to enter the housing to cool the motor-fan assembly.

A propulsion system for an aircraft having an aft end is provided herein. The propulsion system can include an electric propulsion engine defining a central axis. The electric propulsion engine can include an electric motor, a fan rotatable about the central axis of the electric propulsion engine by the electric motor, a bearing supporting rotation of the fan, and a thermal management system. The thermal management system can include a lubrication oil circulation assembly for providing the bearing with lubrication oil. The lubrication oil circulation assembly can be driven independently of a shaft of the electric propulsion engine.

A control circuit for changing the angle of propeller blades includes a propeller control unit controlling a supply of oil to modify an angle of propeller blades, and a fixed-displacement pump providing the supply of oil from an engine oil return system to the propeller control unit. An oil cooling line extends between an outlet of the pump and the engine oil return system. The oil cooling line defines an oil leakage path leading to the engine oil return system for cooling the oil. A flow regulator between the pump and the propeller control unit is operable between an open position where oil is directed through the oil cooling line to the engine oil return system for cooling the oil, and a closed position blocking the oil cooling line and directing oil toward the propeller control unit to modify the angle of the propeller blades.

A component carrier includes a baseboard, two sidewalls, and an ejector. The two sidewalls extend from opposite sides of the baseboard. The ejector includes a side plate, a handle, and a tab. The side plate is positioned in proximity to a first sidewall of the two sidewalls of the component carrier. The handle extends from a first end of the side plate in a first direction that is generally perpendicular to the side plate. The tab is positioned in proximity to the baseboard, and extends from a second opposing end of the side plate in a second direction that is generally perpendicular to the side plate and opposite to the first direction, the tab coupled to a first connector extending from the baseboard. The baseboard includes a first opening such that a portion of the tab of the ejector is configured to directly contact the electronic component therethrough.

A component for a gas turbine engine includes a platform having an outer surface and an inner surface. A cover plate can be positioned adjacent to the outer surface of the platform. The outer surface of the platform can include a pocket and the cover plate is positioned relative to the pocket to establish a platform cooling channel therebetween.

A sealing system includes: a double mechanical seal having a pump-side sealing mechanism (10, 12) and an atmospheric-side sealing mechanism (11, 13); a pump mechanism (19) driven by a rotational shaft (1); a first medium circulation line (30) for circulating a fluid barrier-and-cooling medium between a first chamber (22a) and a second chamber (22b), the first medium circulation line (30) being coupled to the first chamber (22a) and the second chamber (22b), the fluid barrier-and-cooling medium being different from a fluid handled by the centrifugal pump; a heat exchanger (21) and a shut-off valve (28) attached to the first medium circulation line (30); a second medium circulation line (31) bypassing the shut-off valve (28); and a medium pressurizing pump (45) and an on-off valve (23) attached to the second medium circulation line (31).

The present disclosure provides a portable blowing device configured for being worn around a neck of a human body, the portable blowing device includes two parts and two first fans. Each first part defines an airflow channel therein and includes an inner side wall, an outer side wall, and a top side wall connected between the inner side wall and the outer side wall. Each fan is received in one corresponding part and configured for generating an airflow to flow through the airflow channel defined therein. At least a portion of each of the two top side walls includes an inclined surface. Each of the parts defines at least one first air inlet and at least one first air outlet communicated with the at least one first air inlet and the airflow channel, and each of the first air outlets is defined in one corresponding inclined surface.

Systems and methods for cooling a core flow-path of a compressor section of a gas turbine engine are provided. In various embodiments, a cooling system for a gas turbine engine may comprise a valve system located radially outward from an engine case, the valve system being coupled between an air duct and the engine case, the valve system having an actuation device configured to at least one of open or close a valve in response to a command from an electronic engine controller, wherein cooling air from the air duct can pass through the valve system and enter the engine case into a high pressure compressor plenum when the valve system is in an open position.