1033 results about "Lower wing" patented technology

An apparatus and method for replacing a cardiac valve includes an expandable support member having oppositely disposed first and second ends, a main body portion extending between the ends, and a prosthetic valve within the main body portion. The main body portion has an annular shape for expanding into position in the annulus of the valve. The first and second ends include a plurality of upper and lower wing members movable from a collapsed condition into an extended condition for respectively engaging a first section of cardiac tissue surrounding the valve and for engaging a portion of the native valve leaflets to pin the leaflets back against the annulus. The second end further includes at least two strut members spaced apart from each other. A respective one of the strut members is attached to at least one commissural section of the prosthetic valve to prevent prolapse of the valve leaflets.

An apparatus for replacing a cardiac valve having at least two native valve leaflets includes an expandable support member with oppositely disposed first and second ends and a main body portion extending between the ends. The first and second ends respectively include a plurality of upper and lower wing members respectively having first and second magnetic components. The wing members extend from the main body portion and are spaced circumferentially thereabout. Secured within the main body portion is a prosthetic valve having at least two valve leaflets. The second end further includes at least two strut members spaced apart from each other and attached to at least one commissural section of the prosthetic valve. The magnetic components are magnetically attracted to one another so that, when the apparatus is placed in the valve annulus, the wing members are pulled toward one another to secure the prosthetic valve in the annulus.

A robot mechanism adopts a dry cleaning method to clean the surface of live-line insulators without: using water and can perform cleaning and inspection of the surface of the live-line insulators while automatically moving along an insulator string. The robot mechanism includes a main unit having upper and lower wing frames connected with each other by a connecting bracket to surround the insulator string, a cleaning unit disposed between the upper and lower wing frames and including a base frame to perform dry cleaning with a rotational brush and a CM guide, a lift unit including a clamp and a ball-bearing screw to move the main unit up or down, and an inspection unit to electrically inspect the insulators; and a coupling unit to couple a pair of the main units to allow the pair of main units to move along a tension insulator string or a suspension insulator string.

A finned tube includes channels defined between adjacent fins on the tube body outer surface. Wings extend from side walls of the adjacent fins between the fin top and the fin base such that the wings form a barrier which splits the channel into an upper channel and a lower channel. A plurality of holes penetrate the barrier where the wings meet, so liquids and gases can pass into and out of the enclosed area defined by the lower channel. The wings can include alternating upper wings and lower wings, and there can be depressions formed in the fin top.

A wing tip device for fixing to the outboard end of a wing, the wing defining a wing plane, includes: an upper wing-like element projecting upwardly with respect to the wing plane and having a trailing edge; and a lower wing-like element fixed with respect to the upper wing-like element and having a root chord and a trailing edge, the lower wing-like element root chord intersecting with the upper wing-like element, and the lower wing-like element projecting downwardly from the intersection. The upper wing-like element is larger than the lower wing-like element and the trailing edge of the lower wing-like element is adjacent the trailing edge of the upper wing-like element at the intersection. An included angle between the upper and lower wing-like elements at the intersection is less than, or equal to, 160 degrees.

The invention relates to an aquaculture feeding system and belongs to the field of aquaculture. An industrial aquaculture automatic feeding system is characterized in that H-shaped steel tracks are erected above indoor fishponds, feeding devices are arranged on the tracks and comprise walking tackles arranged on the steel tracks, feed bins are hung below the walking tackles, and discharge mechanisms are arranged at the positions of feed bin outlets. Positioning identification plates are arranged below lower wing plates of the H-shaped steel tracks above each fishpond, distance sensors are arranged above the feed bins or below the walking tackles, the distances between the positioning identification plates and the distance sensors are different, and the walking tackles hang the feed bins through pulling pressure sensors. After the feed devices move along the tracks to arrive at identification points of the positioning identification plates, control boxes determine positions according to positioning points sent by the distance sensors, and feeding is controlled accurately according to feeding requirements of a corresponding fishpond at the position.

The invention provides astress island assembled type hollow floor, comprising a column, a main beam, an assembled type hollow plate, a stress island, an upper wing plate of the assembled type hollow floor, and a joint seam, wherein the assembled type hollow plate consists of a longitudinal rib, a bidirectional loading-formed regeneration rib, a hollow hole forming member, a lower wing plate, a rib or local stirrup exposure of the rib and a stress island reserved corner; the longitudinal rib of the assembled type hollow plate is provided with two exposed ends; the stress island is arranged in such a manner that, in the fabrication of the assembled type hollow plate, a space larger than 0.18mm<2> for the stress island reserved corner is assembled at the periphery of an outer edge of the column, a column rib, a main beam rib, an upper wing plate rib and a rib in the space for the stress island reserved corner form stress island ribs, and concrete is cast to form the stress island; the joint seam is formed in a lower surface of the stress island assembled type hollow floor, and is in an intermittent state, and the joint seam is only part of thickness of the hollow floor.

The purpose of the invention is a structure element, particularly an lower wing element of an aircraft, manufactured from a rolled, extruded or forged product made of an alloy with composition (% by weight): Cu=4.6-5.3, Mg=0.10-0.50, Mn=0.15-0.45, Si <0.10, Fe<0.15, Zn<0.20, Cr<0.10, other elements <0.05 each and <0.15 total, the remainder being Al treated by solution heat treating, quenching, controlled tension to more than 1.5% permanent deformation and aging.

A truss-type corrugated steel web composite beam with an open bottom chord belongs to a bridge support member. The bottom chord opened and truss-type corrugated steel web composite beam comprises an upper wing edge concrete slab, a corrugated steel web and a bottom chord opened truss-type rectanglar steel tube concrete member. Compared with steel truss-type web composite corss section, the invention adopts the corrugated steel web with rather high shear strength to replace a steel web member, so as to guarantee quite high shear bearing capacity. The opened truss-type bottom chord is composed of two parallel-arranged rectanglar steel tubes arranged in parallel and internally cast concrete, as well as horizontal braces and batter braces between the rectanglar steel tubes. Moreover, the bottom chord adopts the steel tube concrete member to overcome the problem of rather high work volume that, in traditional composite cross section of corrugated steel web box beams and steel truss-type webs, such execution measures as scaffolding, formwork-support, concrete casting and etc. should be taken for lower wing edge concrete slabs. Meanwhie, the invention can effectively improve structure crack resistance, avoid crackage exposure and etc, and considerably increase structure durability. The bottom chord is a brace-connected open-type structure with advantages of simple structure and fast, smooth and convenient execution.

The invention is a variable section conversion node for profiled steel concrete framework-steel support structure, interconnecting in-pillar profiled steel, in-beam profiled steel, steel support, in-pillar reinforced concrete and in-beam reinforced concrete and pouring then into an organic whole, where the steel support is orthogonally connected with in-pillar an in-beam profiled steel flange plates by section conversion, the web of the in-beam profiled steel in the node connection position is converted into heightening variable section web and the top surface of the heightening variable section web is welded with widening variable section upper wing plate, the bottom surface of the heightening variable section web is welded with widening variable section lower wing plate; the shape of the steel support in the node connecting position is converted into structure of variable section node conversion region and two flange plates of the steel support in variable section conversion region are orthogonally connected with the in-pillar and in-beam profiled steel respectively. And the invention intensifies fore bearing performance of node regions of the profiled steel concrete framework-steel support structure and ability of cooperating of profiled steel and reinforced concrete.

The invention provides a three-hole probe type pressure measurement tail rake for a wind tunnel test. A plurality of connecting rods are distributed at the top end of a support platform; a three-hole probe is fixed on each connecting rod; a total pressure hole is arranged at the conical top end of each three-hole probe, and two static pressure holes symmetrically distributed on the conical surface of the three-hole probe, and the central line of the total pressure hole and the central lines of the two static pressure holes are in the same horizontal plane. According to the three-hole probe type pressure measurement tail rake, the actual total pressure, static pressure and airflow drift angle at each probe can be obtained through one total pressure hole and two static pressure holes on each probe; then, two velocity components u and v at each probe in the axial direction of a tunnel and in the horizontal plane of the height center of the tunnel can be obtained in combination with measurement of fluid density; according to the obtained static pressure distribution and the distribution of the two velocity components u and v at each three-hole probes, the resistance of a wing section can be obtained on the basis of the momentum theory, so that the two-dimensional velocity and speed drift angles of all points of wake flow can be captured at the same time. The three-hole probe type pressure measurement tail rake for the wind tunnel test is suitable for the situation that the lift force is large and the wake flow inclines to a lower wing face greatly.

An aircraft comprises at least one wing comprising a trailing edge flap that is selectively moveable between a stowed position and an extended position. The aircraft also includes a fuselage comprising a first gear door on a side of the fuselage and a second gear door on a bottom of the fuselage. The first gear door is moveable in a gear door envelope between a closed position and an open position. The wing is coupled to the fuselage in a low-wing configuration. A landing gear assembly is coupled to the fuselage and is selectively moveable between a retracted position and a deployed position. The trailing edge flap may be extended simultaneously with, before, or after deployment of the landing gear assembly and opening of the first gear door.

The invention relates to a manufacturing method for making an unwrought semi-finished product having at mid thickness a density of micropores of size greater than 90 μm less than 50% and preferably less than 20% of the density of micropores of size greater than 90 μm obtained by a method according to prior art. The method according to the invention comprises in particular an ultrasound treatment step for the molten metal bath in a furnace and/or a vessel using an immersed device comprising at least one ultrasound transmitter. The semi-finished products obtained according to the method of the invention are particularly advantageous for manufacturing by rolling sheets designed for the aircraft industry to produce spars, ribs, upper and lower wing skins and for manufacturing by extrusion sections designed for the aircraft industry to produce stiffeners.

The invention provides a vaginal dilator with double side wings, comprising an upper wing, a pressing handle, a lower wing, and a handle; the upper wing and the lower wing are connected through a pin; the pressing handle and the handle are meshed with each other through a first dilation fixing structure; the vaginal dilator further comprises an arc flexible locating sleeve rotatably connected with the upper wing; both ends of the sleeve are respectively provided with a mounting base; the base is provided with a mounting hole for holding the side wings capable of being held between the upper and the lower wings; the rear part of the side wings is provided with a second dilation fixing device meshed with the upper part of the rear end of the upper wing; and a passage can be installed in the side wing. Compared with the prior art, the vaginal dilator with double side wings has the advantages of wider field range, simple structure and easy manufacturing.

A vertical or short takeoff and landing (V/STOL) airplane is described having a vertical form factor. Making the airplane tall has many advantages when operating in hover mode close to the ground. Several variations of the design are described. The preferred embodiment consists of two tall fuselage² structures having an airfoil shape in plan view. As high above the ground as practical a “lift wing” spans the space between these fuselages. This wing may be equipped with lift augmentation systems to facilitate V/STOL flight. In the center of the span on the leading edge of the lift wing is placed a turboprop engine. Alternatively, the wing and attached engine can be made to tilt about a horizontal axis. For takeoff the wing will be tilted skyward. A second wing slightly below and behind the lift wing has a pusher engine located on the trailing edge. This lower wing and engine is also able to tilt about a horizontal axis parallel to the lift wing. During takeoff this lower engine is pointed downward toward the ground. This lower wing contains aerodynamic control surfaces to provide attitude and position control. Subsequent to liftoff the wings and engines tilt into a horizontal position to provide cruise lift and thrust. At the end of the flight the wings and attached engines are tilted back to provide vertical lift for hover, maneuvering, and soft landing.

² “Fuselage” is used here even though it substantially differs from the conventional fuselage (and its French origins meaning, “spindle shaped”) since in plan view it is an airfoil shape of large thickness. It will be used here for lack of a better word. Think of fuselage as meaning “where the pilot, passengers and cargo are located”.

The invention relates to a steel column and beam structure used in the building and a welding device thereof, particularly discloses a steel column and beam structure with a corrugated steel web and a special welding device thereof. The steel column and beam structure comprises an upper wing plate, a lower wing plate and a web plate arranged between the upper wing plate and the lower wing plate, wherein the upper wing plate and the lower wing plate are made of plates with the thickness of 4-30mm, the web plate is a corrugated steel web plate with the thickness of 4-10mm, and the surfaces of the upper wing plate, the lower wing plate and the web plate are prepared with 50-500Mu m of roughness; the welding device of the steel column and beam structure with the corrugated steel web comprises a welding tractor and a welding gun arranged on the welding tractor, wherein tool sliding bars which are symmetrical are arranged on the welding tractor, a magnetic adsorption piece is arranged at the bottom of the welding tractor, four driving wheels are symmetrically arranged at two sides of the magnetic adsorption piece, and a track positioning retainer is arranged in a bracket at the middle part of the welding tractor. The middle web plate adopts the corrugated steel web plate, the steel beam and column with the corrugated steel web is welded by using the special welding device, therefore, the invention has the advantages of light weight and strong earthquake resistance.