65results about How to "Small frontal area" patented technology

A medical device for use in the interior of a body lumen includes a balloon catheter and a radially expandable stent. The stent includes a plurality of zig-zags of a low memory metal formed into a hollow, open-ended cylindrical shape. The individual zig-zags have a curved portion forming a reversing bend which allows the zig-zags to expand and deform as the balloon radially expands the stent. The curved portions of the zig-zags are aligned along the length of the stent in a spaced-apart arrangement with some curved portions attached and others unattached to adjacent zig-zags. The resulting stent is longitudinally flexible throughout its length when unexpanded and is also capable of conforming to a bend in the body lumen when expanded.

The flaps (101) are fastened to the bottom of the boat, with hinges (122) and are extended under the moving boat to generate lift or cause drag. The area of the flaps (101) can be increased with extensions (102). Slots (104) are present on the flaps (101) to relieve vortexes and some drag. Lift amount can be regulated by the amount of flap presentation and by use of the extensions (102). Flaps are individually controllable or can be moved in unison. Increased drag will result from extreme extension of the flaps. The number of flaps, fastened to the boat forward of the stern, can be two, four or more if desired. Complete retraction of the flaps will result in a smooth bottom

A multi-piece projectile for a small arms cartridge includes a metal cup that has a bore, a plastic sheath having a through hole and a high-density core. The cup is a cylindrical metal structure having a bore. The sheath is a cylindrical end and a conical end and a through hole. The core is a cylindrical structure having conical end and a blunt end. The projectile is assembled by placing the core in the through hole of the sheath and then pressing the sheath into the bore of the cup. The assembled projectile is attached to the cartridge by crimping the cup to the orifice in the end of the cartridge casing after it is filled with the propellant. When the projectile is fired all of the components remain coupled together but break apart upon impact with a target. Because the core has a higher mass than the other components the components separate very easily, the majority of the kinetic energy remains in the core. Once separated from the other components, the core is able to penetrate through various protective materials.

The invention is an improvement to an active paintball loader used to feed a supply of paintballs to the breech of a paintball marker wherein the loader is located remote from the marker breech to reduce the target profile of the paintball game player. The loader includes a conventional reservoir for storing a quantity of paintballs, a drive mechanism for moving individual paintballs out of the loader reservoir and into a feed tube where they are forced to the breech inlet of the marker. Locating the loader on the compressed gas storage cylinder reduces the frontal area of the marker/loader combination thereby reducing the target area of a competitor using the LRL during a paintball competition. The location also improves the balance of the combination marker, loader, gas cylinder apparatus making it easier for the player to handle during evasive maneuvers during paintball game play. The improved location of the loader relative to the breech inlet also allows use of a substantially straight feed tube which reduces the propensity for paintball rupture which reduces the chance that a paintball game player will be taken out of competition due to a paintball feed jam.

A wind driven energy source is providing utilizing a turbine wheel comprising a peripheral rim attached to a central hub via a series of spokes. A plurality of airfoil blades are assembled to the wheel, each blade being secured to a pair of spokes and positioned proximate an interior edge of the rim and extend only partially down the length of the spoke. This provides a central opening allowing airflow through the innermost region of the wheel. The blades are pivotally assembled to the spokes and can include an incident angle adjusting mechanism as well as a breakaway feature.

The invention discloses an expansive soil slope and a construction method. The slope toe angle of the slope is increased to steepen the slope, so that the slope surface water is mainly runoff when rain falls or water flows through to reduce seepage, and the moisture content in the expansive soil of the slope is controlled to be within a lower range to prevent the loss of stability due to expansion of the expansive soil after water absorption of the slope. According to the slope and the method, the varying slope of the expansive soil slope is 45-60 degrees to quicken the surface runoff of the rainwater; the surface of the slope is covered by a clay layer with thickness of 10 cm; fiber reinforcements with length of 20-25 cm are uniformly implanted into the surface of the slope and are exposed out of the clay layer for 3-5 cm; turfs of which roots develop well in the transverse direction but develop poorly in the longitudinal direction are planted on the clay layer.

A device includes a u-channel shaped member and a printed circuit board including a plurality of capacitors. Each of the plurality of capacitors has a mounting surface mounted to the printed circuit board and an opposing heat transfer surface thermally coupled to the u-channel shaped member. The device also includes an output cable coupled to the printed circuit board and a return cable coupled to the printed circuit board. The device further includes a control transistor disposed inside the u-channel shaped member and a current sensing resistor disposed inside the u-channel shaped member.

A steering and suspension mechanism for a motorbike, scooter, bicycle, skateboard or other two wheeled, in-line, vehicle, incorporating a steering axis rake that is inclined to the vertical, in a direction that is upwards and forwards from the ground in the normal direction of travel, together with a trailing radial arm suspension, in combination. Steering may be effected via a push rod attached to the handlebars, which in turn pivot on the main chassis. A brake calliper may be pivoted on the wheel axle, with a link to the steering head assembly to prevent rotation of the calliper with the brake disc under braking. This link may be parallel or nearly parallel to the radial arm. The exact angle can be chosen to control ‘dive’ due to weight shift under braking.

A skeleton for the body of a shock vehicle is composed of bottom skeleton with integral protecting plate, front skeleton, top skeleton with a circular hole for installing a multipurpose rotary platform, and back skeleton. It uses the truss structure made of uniform-section tubes and has 6 rings for airborne and 4 lifting points.

The invention relates to a variable incidence scramjet engine outboard cowl, which comprises side walls and a fixed lower wall surface; two sides of the fixed lower wall surface are provided with the side walls; a turning axle arranged on a lip of the fixed lower wall surface is hinged with an adjustable lower wall surface under the fixed lower wall surface; and the adjustable lower wall surface deflects around the turning axle by the driving of a drive mechanism, and the deflection position of the adjustable lower wall surface is limited by a limiting and locking mechanism. In the variable incidence scramjet engine outboard cowl, the adjustable lower wall surface deflecting around the lip of the fixed lower wall surface is arranged under the fixed lower wall surface, and the change of aeroperformance of an aerocraft is realized by adjusting the incidence of the adjustable lower wall surface, so that the aerocraft obtains the optimal aeroperformance under different flight regimes.

The invention discloses a throwing material for lightening interception difficulty and protecting dikes of rivers. The throwing material is a cylindrical line throwing material, the throwing material is provided with a lateral punched hole, rough ribs are arranged at the outer side of the cylinder, the incident flow end of the solid cylindrical line throwing material is provided with a streamline conical head, and the incident flow end of the hollow cylindrical line throwing material is provided with a thin-wall sharp edge. After the cylindrical line throwing material is thrown along the flow from the dike head at the difficult interception section of a cofferdam, the throwing material rolls around a shaft to the bottom of a slope; the throwing material reaches the deep groove part of a closure gap more easily compared with other bulk materials for intercepting the flow by means of sliding; the material has strong underwater impact resistance and low loss, can protect the dike from collapsing, and has the effect of obviously reducing the interception difficulty; and the throwing material can also be used for dike protection of rivers and slope protection and dike protection of reservoir earth and rockfill dams.

The invention discloses a cross-medium aircraft based on a common rotor and a cycloidal propeller. The aircraft comprises an aircraft body, a horizontal support frame and a cross-medium propeller. Anend part of the horizontal support frame is connected with the cross-medium propeller through a propeller tilting device, and the propeller tilting device is used for driving the cross-medium propeller to rotate in a vertical plane around an axis of the horizontal support frame; and the cross-medium propeller is provided with a plurality of blades evenly distributed around the axis of the cross-medium propeller, and the cross-medium propeller is connected with the roots of the blades through a blade turnover device. According to a deformation propeller considering performance characteristics of an aerial fluid and a underwater fluid, one set of propeller can be used for achieving omnidirectional maneuvering navigation and fixed-point hovering in the air and under the water, and a underwater slamming force and a storage space are reduced through composite deformation.

A wave rotor apparatus is provided. In another aspect of the present invention, a radial wave rotor includes fluid passageways oriented in a direction offset from its rotational axis. A further aspect of the present invention employs stacked layers of generally radial channels in a wave rotor. Moreover, turbomachinery is located internal to a wave rotor in yet another aspect of the present invention. In yet another aspect of the present invention, a radial wave rotor has an igniter and fuel injector. Correctional passages are employed in still another aspect of the present invention wave rotor.

The invention discloses a low pressure drop holding grid which comprises a plurality of inner strips and outer strips, wherein the plurality of inner strips are intersected with one another to form a net-shaped grid structure and are formed into a plurality of hollow grid units; the outer strips are arranged at the periphery of the grid structure in an enclosure manner and are fixed with the inner strips; a plurality of first guide wings which are arranged at intervals are formed on the upper edges of the outer strips; a plurality of second guide wings and third guide wings which are arranged alternatively are formed on the lower edges of the outer strips; each third guide wing is positioned between two adjacent second guide wings; the interval between each second guide wing and each third guide wing is smaller than the width of each first guide wing; the first guide wings, the second guide wings and the third guide wings all extend into the grid structure in an inclined and convex manner. By adopting the low pressure drop holding grid disclosed by the invention, hooking in hoisting is effectively prevented, and moreover through cooperation of three guide wings, the amplitude that the guide wings extend into the grid structure in the inclined and convex manner can be very small, so that the incident flow area is small, and the pressure loss of a coolant is small.