A system for bleeding air from a core flow path of a gas turbine engine is disclosed. In various embodiments, the system includes a bleed valve having a bleed valve inlet configured to receive a bleed air from a first access point to the core flow path and a bleed valve outlet; and an air motor having a first air motor inlet configured to receive the bleed air from the bleed valve outlet and a first air motor outlet configured to exhaust the bleed air, the air motor configured to pump the bleed air from the core flow path of the gas turbine engine.

Multiple propulsion units mounted inside an enclosure near openings can be used to control the fluid flow in and out of the openings and also to determine the total fluid flow at any additional uncontrolled openings. By controlling the fluid flow, where such control is available, and by considering the resulting flow at any uncontrolled enclosure openings, it may be possible to achieve a desired thrust vector but have a more favorable weight/shape/efficiency than would be possible without the enclosure and use of coordinated control of fluid flow into or out of some openings. The designed geometry of the enclosure is an important consideration and will have an effect on the overall thrust magnitude and direction. A grouping of propulsion systems can be coordinated to achieve a more general thrust vector and associated moment on a vehicle.

Multiple propulsion units mounted inside an enclosure near openings can be used to control the fluid flow in and out of the openings and also to determine the total fluid flow at any additional uncontrolled openings. By controlling the fluid flow, where such control is available, and by considering the resulting flow at any uncontrolled enclosure openings, it may be possible to achieve a desired thrust vector but have a more favorable weight/shape/efficiency than would be possible without the enclosure and use of coordinated control of fluid flow into or out of some openings. The designed geometry of the enclosure is an important consideration and will have an effect on the overall thrust magnitude and direction. A grouping of propulsion systems can be coordinated to achieve a more general thrust vector and associated moment on a vehicle.

Example implementations involve a system involving a portable container package that includes a first air compressor and a second air compressor disposed therein in a side-by-side configuration and oriented in opposing directions. The first air compressor and the second air compressor each have a corresponding electric motor, and a split cooler disposed on opposite ends of the portable container package. Air vents are supplied on opposite sides of the portable container package so that air flow can be received through the air vents to a corresponding air compressor.

Example implementations involve a system involving a portable container package that includes a first air compressor and a second air compressor disposed therein in a side-by-side configuration and oriented in opposing directions. The first air compressor and the second air compressor each have a corresponding electric motor, and a split cooler disposed on opposite ends of the portable container package. Air vents are supplied on opposite sides of the portable container package so that air flow can be received through the air vents to a corresponding air compressor.

A backpack tool apparatus including a backpack assembly and at least one tool. The backpack assembly includes a casing and at least one battery pack received in the casing. The at least one tool is connected to the casing and electrically connected to the battery pack. The backpack tool apparatus may be provided with multiple tools to simultaneously realize different operations and functions. Moreover, the tools may be configured to be detachably connected to the backpack assembly, and may be replaced with different tools to realize different operations and functions according to needs.

A backpack tool apparatus including a backpack assembly and at least one tool. The backpack assembly includes a casing and at least one battery pack received in the casing. The at least one tool is connected to the casing and electrically connected to the battery pack. The backpack tool apparatus may be provided with multiple tools to simultaneously realize different operations and functions. Moreover, the tools may be configured to be detachably connected to the backpack assembly, and may be replaced with different tools to realize different operations and functions according to needs.

A ceiling fan is designed with enhanced structural strength and prolonged service life. The ceiling fan includes a stator, a loading plate, a rotor and a plurality of blades is disclosed. The stator includes a shaft. The loading plate includes a sleeve and a radial extending portion. The radial extending portion radially extends outwards in radial directions of the shaft. The sleeve receives a bearing coupled with an outer periphery of the shaft. The rotor includes a hub coupled with the loading plate. The plurality of blades is coupled with the radial extending portion.

Combining at least one centrifugal compression stage and at least one positive displacement compression stage in an integrally geared compressor to allow for different types of compression based on a temperature or a volume of gas to be compressed by the integrally geared compressor.

The present invention provides an air purifier including a plurality of bi-directional fans, which are arranged to be misaligned in a vertical direction such that the discharge directions of discharge ports are different from each other.