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18398 results about "Propeller" patented technology

A propeller is a type of fan that transmits power by converting rotational motion into thrust. A pressure difference is produced between the forward and rear surfaces of the airfoil-shaped blades, and a fluid (such as air or water) is accelerated by the pressure difference. Propeller dynamics, like those of aircraft wings, can be modelled by Bernoulli's principle and Newton's third law. Most marine propellers are screw propellers with helical blades rotating around an approximately horizontal axis or propeller shaft.

Tower fan assembly with telescopic support column

A vertical axis tower fan apparatus having an adjustable support column. The tower fan apparatus is comprised of a support base, a telescopic support column adjustable between fixed, retracted and extended positions, a vertical axis propeller encased within a housing, and a motor. The vertical axis propeller is contained within the cylindrical housing, wherein the housing is rotatably coupled to one end of the support column. The fan is rotatably connected to the top of the support column and is adapted to rotate freely thereon, when activated. The opposing end of the column is insertable into the support base. The telescopic column is comprised of a hollow pillar and an extendable member removably inserted within the hollow pillar. The column is manually adjustable to a variety of heights to provide cooling air to different target heights via the use of an adjustable locking sleeve. The sleeve may be loosened, to allow the extendable member to be extracted from within the hollow pillar and raised until the fan reaches a desirable height. Conversely, the extendable member may be retracted until the fan reaches another target height. When the desired height is reached, the sleeve is tightened thereby preventing the member from moving within the pillar. A keypad located in the housing cover, or a remote control unit allows the user to program the fan, via the use of a microcontroller within the fan housing, to achieve a variety of speeds and wind patterns, as well as activating an oscillation mode and a timer.

Remote-control flying copter and method

A hovering remote-control flying craft having a molded frame assembly includes a plurality of arms extending from a center body with an electric motor and corresponding propeller on each arm. In various embodiments, the motor and propeller are mounted downward-facing at a distal portion of each arm with a motor cover over the motor. The center body can be formed of a two-piece molded structure that sandwiches a circuit board to provide structural support for the frame. The circuit board can include a plurality of tabs that facilitate mounting of wire connectors, and can also provide antennas and emitters for both IR and RF communications. In some embodiments, a removable safety ring protects the propellers from lateral contact.

Wave wheel of washing machine

The invention discloses a wave wheel of a washing machine, comprising a base and a plurality of blades arranged on the base, wherein the blades are provided with veins and water propelling surfaces with slopes at two sides. The wave wheel is characterized in that a cone-shaped platform is arranged at the middle part of the base; raised propelling ribs of which the quantity is same as the quantity of the blades are arranged on the vertical face of the cone-shaped platform and smoothly connected to the corresponding veins; water propelling surfaces of each blade have different slopes; concave surfaces and convex surfaces are arranged on the water propelling surfaces; the veins are S-shaped for corresponding to the curve surface changes of the concave surfaces and convex surfaces of the water propelling surfaces; moreover, side-looking lines of the veins are continuous curves firstly concave and then convex outwards from the center of the base. According to the invention, the blades show a streamline shape like a propeller and the water propelling surfaces are smooth and temperate, but the motive power is strong and the washing ability is outstanding; meanwhile, water flow raised in the middle can be generated to ensure that clothes rotated to the central position of a wash bucket are scattered and effectively prevented from being intertwisted; in addition, the destroy of backward rotation to water flow trend is decreased to ensure that the anti-intertwist ability is further increased.

Helicoil interference fixation system for attaching a graft ligament to a bone

A helicoil interference fixation system comprising:a helicoil comprising a helical body comprising a plurality of turns separated by spaces therebetween, the helical body terminating in a proximal end and a distal end, and at least one internal strut extending between at least two turns of the helical body; andan inserter for turning the helicoil, the inserter comprising at least one groove for receiving the at least one strut;the helicoil being mounted on the inserter such that the at least one strut of the helicoil is mounted in the at least one groove of the inserter, such that rotation of the inserter causes rotation of the helicoil.
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