Abstract: A method performed by a medical device, includes: providing a permanent magnetic field by a permanent magnet; operating an electromagnet to provide a first electromagnetic field with a first electromagnetic field value; and operating the electromagnet to provide a second electromagnetic field with a second electromagnetic field value; wherein the first electromagnetic field and the permanent magnetic field forms a first total magnetic field with a first total magnetic field value, and wherein the second electromagnetic field and the permanent magnetic field forms a second total magnetic field with a second total magnetic field value; wherein the first total magnetic is formed when an electric field in an accelerator or an energy level of a particle beam has a first value, and wherein the second total magnetic field is formed when the electric field in the accelerator or the energy level of the particle beam has a second value.

Abstract: Described herein is a device that will restrict the radiant heat from transferring all around a patio heater and instead will effectively focus, deflect and/or reflect radiant and convective heat from a patio heater toward a desired direction. By focusing the heat toward one direction, heat is not lost to the unoccupied direction where no persons are lounging. Rather, more of the heat is directed toward the people and thus the heater operates more efficiently.

Abstract: A wind-resistant umbrella including a canopy attached to an upper end of a pole member, flexible ribs, and multiple load sensitive connectors (LSCs) is provided. The flexible ribs flex inwardly at a wind speed of more than about 10 miles per hour (mph) to preclude wind from traveling under the canopy. The LSCs detachably couple an upper canopy section to a lower canopy section of the canopy. The upper canopy section partially overlaps the lower canopy section along the LSCs. Upon impact from a wind gust that exceeds a speed of more than about 20 mph, at least one of the LSCs detach to allow wind to flow freely through one or more vents created between the upper and lower canopy sections, while providing warnings to a user, and to preclude wind-induced tilting and lifting actions on the wind-resistant umbrella, thereby precluding dislodgment thereof from an anchoring location.

Abstract: A foldable hunting blind uses a hub assembly to easily expand into its final configuration with side supports used to stabilize the blind. Further, the foldable hunting blind includes apertures in each wall configured to hold and direct firearm muzzles away from hunters within the blind and a door through the front wall allowing a dog to easily enter and exit the blind.

Abstract: A sun tracking canopy structure having a canopy positionable to maintain a shaded area based on calculated solar elevation and azimuth.

Abstract: The invention is directed to an umbrella comprising a plurality of shingles attached to a webbed or mesh support. The umbrella includes a plurality of shingles attached in an overlapped orientation to a lower mesh layer. Each shingle is supported by a pair of grommets to prevent the shingles from moving and/or rotating in response to the wind. The shingles and mesh arrangement allow air to be vented through the umbrella canopy. As a result, the umbrella effectively resists wind and air gusts that commonly cause conventional umbrellas to be uprooted from the sand and/or damaged.

Abstract: A shape disrupter for a net support system may have a conical body and an elliptical shape in plan view. The shape disrupter may have low thermal signature and low weight. The shape disrupter may be stackable. The shape disrupter may have a protrusion on the shape disrupter for fixing each of the shape disrupters in place during stacking. The shape disrupter may have cutouts or openings to reduce the weight and thermal signature of the shape disrupter. The shape disrupter of the present disclosure may cooperate with support poles or nets to provide a support system for large nets or screens.

Abstract: A mister-equipped umbrella to shield a user from precipitation, to provide protection from harmful UV rays, and to allow the user to activate a mister having a variable mist head to cool the user on a hot, sunny day. The mister-equipped umbrella generally combines an umbrella assembly and a mister assembly. The umbrella assembly includes a tube, a runner, a plurality of stretchers, a plurality of ribs each terminating in a top, a cover having at least one UV coating, and a handle that has an inner volume for storing batteries and an outer surface that may be insulated for gripping. The mister assembly includes a fluid reservoir, a pump, and a variable mister head. In use, the user may manually adjust the variable mister head to configure a misting pattern and frequency of the mister.

Abstract: A safety sign system comprises one or more traffic or informational signs, an expandable pole, a detachable umbrella canopy assembly, and a safety finial assembly. The signs are removably attached to a sleeve that surrounds a portion of a pole and rests upon a sign support. The sleeve with the signs attached swivels about the pole. The umbrella canopy assembly is attached to an upper end of the pole and may include additional features including reflective tape, vents, drop-down flaps, reflective coating, and lights. The safety finial assembly is removably attached to the top of the umbrella canopy assembly and may include flag supports, removable flags, and a safety light assembly. The safety sign system optionally further comprises a collapsible seat, a beverage holder, a satellite tracking device, a communication device, a base, and a control panel for operating the safety light and other features.

Abstract: An umbrella cover includes: a main umbrella cove provided with a vent; and a shading portion arranged at the vent and adapted to shade sunshine from the vent. When wind blows toward the umbrella cover, a part of the wind may blow through the vent and take away hot inside the umbrella, thus achieving the ventilation of the umbrella. In addition, since the main umbrella cover is provided with the vent, the area of the umbrella cover subjected to the wind force is reduced and the wind force subjected by the umbrella cover is reduced further, thus improving the stability of the umbrella, and thereby decreasing the risk of the umbrella blown down by the wind. Furthermore, since the umbrella cover is the umbrella cover of one layer constituted by the main umbrella cover and the shading portions, the hot inside the umbrella is easy to be dissipated.

Abstract: A privacy umbrella includes a canopy, and at least a portion of the canopy includes a section made of a one-way material that allows an individual under the canopy to see outward through the one-way material, but which prevents people outside the canopy from obtaining a good view through the one-way material into the interior of the canopy. The canopy could have only a single panel of one-way material, multiple panels of one-way material, or one or more windows of one-way material. Alternatively, the entire canopy could be formed of a one-way material. The one-way material could be formed from various different materials or layers such that the one-way functionality is obtained.

Abstract: An umbrella cover includes: a main umbrella cove provided with a vent; and a shading portion arranged at the vent and adapted to shade sunshine from the vent. When wind blows toward the umbrella cover, a part of the wind may blow through the vent and take away hot inside the umbrella, thus achieving the ventilation of the umbrella. In addition, since the main umbrella cover is provided with the vent, the area of the umbrella cover subjected to the wind force is reduced and the wind force subjected by the umbrella cover is reduced further, thus improving the stability of the umbrella, and thereby decreasing the risk of the umbrella blown down by the wind. Furthermore, since the umbrella cover is the umbrella cover of one layer constituted by the main umbrella cover and the shading portions, the hot inside the umbrella is easy to be dissipated.

Abstract: An air cooled sunshade constructed to provide cooling under the canopy of the sunshade. The foldable canopy of the sunshade includes a plurality of segments of elongated panels having embedded solar panels and a plurality of segments of pliable material to allow the canopy to easily stretch when in the open position and collapse in the closed position, typically arranged having one elongated panel connected on foldable material segment arranged around a center piece. In an embodiment disclosed herein, the pliable material is formed as a pipe having an upper layer and a lower layer, the lower layer having pores through which air can flow to the area under the canopy. The air can then flow from a fan or an air conditioner mounted on the center piece and allowing air to flow evenly under the canopy. The solar panels are connected to provide the necessary energy.

Abstract: The umbrella includes a shaft, a lower canopy having a central opening, and an upper canopy thereabove over the opening. A first supporting assembly includes ribs, stretchers, and a runner and is connected to the shaft and first and second canopies to operably move the canopies between closed and open positions, wherein an inner portion of the upper canopy moves with the ribs. A second supporting assembly is connected to the ribs of the first assembly within the opening and connected to an outer portion of the upper canopy for operably moving the outer portion of the upper canopy between concave and convex positions while the lower canopy and inner portion of the upper canopy are retained in the concave position, such that the outer portion of the upper canopy covers the opening when concave to restrict air passage and exposes the opening when convex to permit air passage.

Abstract: An umbrella that offers improved performance in windy conditions is disclosed that includes an umbrella cover that has a plurality of gills positioned throughout its surface to allow for the release of air pressure caused by wind that impacts the umbrella cover. A flap portion may be positioned over each of the gills so that the flap is raised when wind gusts blow into the umbrella in order to permit the release of air from the umbrella. This reduces the risk that the umbrella could blow inside out or reverse itself. The flap is also preferably positioned over the slit in order to prevent water from going through the umbrella and wetting the umbrella's handler.

Abstract: A portable sun and weather shelter is provided. The shelter comprises an umbrella foldable between open and closed positions. The umbrella has a center post, a canopy, and a frame to fold the canopy up and down. A pair of wings are attached to the perimeter edge of the canopy and can be extended outwardly beyond the canopy.

Abstract: An umbrella is disclosed. In one embodiment, the umbrella includes an extensible, collapsible handle adapted to interchangeably secure the umbrella to a surface to allow for hands-free operation while a user is beneath the umbrella in order to remain dry and shaded. In at least one embodiment, the umbrella includes a retractable, magnetic attachment device in the handle. The umbrella includes a multiplicity of angle, pivot, and rotation configurations for use. The umbrella is adapted to pivot and bend in various locations. The umbrella provides for hands-free use when mounted. It at least one embodiment, the umbrella includes one or more of a shaft light and a frame light to provide illumination.

Abstract: An umbrella is provided that comprises a canopy and a support structure upon which the canopy is supported. The canopy can comprise a first panel and a second panel. The support structure can comprise a spacer configured to provide a gap separating the first and second panels to permit air to be vented through the canopy.

Abstract: An umbrella having a central shaft, a spindle slidably disposed on the shaft, a first plurality of radially extending ribs hingedly attached to the shaft, a second plurality of radially extending ribs secured at first ends thereof to the spindle and secured at second ends thereof to respective ones of the first plurality of ribs and an umbrella canopy supported by the first plurality of ribs, the canopy secured to the first ends of the first plurality of ribs adjacent to the second end of the central shaft and secured to the second ends of the second plurality of ribs at an outer perimeter of the canopy, wherein the canopy includes one or more single-canopy umbrella panels, and one or more double-canopy umbrella panels and wherein the double-canopy umbrella panels includes an upper canopy and a lower canopy, and wherein only the lower canopy is secured directly to the ribs.

Abstract: A windproof umbrella includes a center post (10) including an upper grommet (11), an intermediate fixed ring (12), and a lower sliding runner (13); ribs (20) each having one end (21) pivotably secured to the grommet (11) and the open other end (22); main joints (51) each formed at a portion of the rib (20); stretchers (30) each having one end (31) pivotably secured to the ring (12) and the other end (32) moveably secured to the main joint (51); auxiliary joints (61) each formed at a portion of the stretcher (30); and struts (40) each having one end (41) pivotably secured to the runner (13) and the other end (42) moveably secured to the auxiliary joint (61); a lower canopy (70) secured in covering relation on the ribs (20); and an upper canopy (80) having a peripheral edge positioned over a portion of the lower canopy (70).

Abstract: A system such as a foldable and unfoldable umbrella, sunshade, or parasol for protection against bad weather, includes: a pole (31), at least two bushes (12), two frames, two series of wind evacuation openings (8, 9), three mutually overlapping coverings (7, 10, 22) maintained by series of adjusters having a resilient core (20), and two safety springs (3, 4). At least two wind passages are defined by the second and third covering from a predetermined speed.

Abstract: A portable sun and weather shelter is provided. The shelter comprises an umbrella foldable between open and closed positions. The umbrella has a center post, a canopy, and a frame to fold the canopy up and down. A pair of wings are attached to the perimeter edge of the canopy and can be extended outwardly beyond the canopy.

Abstract: Generally speaking, an umbrella having a frame formed by a plurality of rod members joined together by a plurality of hinges, is disclosed. The frame forms a periphery of a shape, such as a circle, square, hexagon, etc., and the frame is capable of movement between a folded configuration and an unfolded configuration. A canopy is attached to the frame, and may be detachable there from, and is also capable of movement with the frame between the folded configuration and the unfolded configuration. A stem having a first end attached to the frame along the periphery and extending there from allows the user to position the umbrella to achieve ideal coverage during use. The stem may include a handle formed at a second end opposite the first end, for improved gripping and control of the umbrella.

Abstract: A beach umbrella with improved sturdiness, durability and ability to keep the shading size maximized, but weight of the structure to the minimum is disclosed. The umbrella may include a poll member, an upper ring member at substantially the top of the poll member, a slider member which is movable along the poll member, a interior rod frame stretching member to pivot with respect to the upper ring member, a support rod frame member to pivot with respect to the slider member and a transfer rod frame member to pivot with respect to the support rod frame member.

Abstract: A wind-resistant umbrella is disclosed. The wind-resistant umbrella includes a canopy having one or more cutout sections. Each cutout section is covered by a flap. The flap is attached to the canopy at an upper edge. The flap is held in place by a limiting element such as an elastic strip. Ideally, the flaps cover and overlap the cutouts. Thus, when wind blows, air flow can take place through the cutout sections from the underside of the canopy. The flaps will be displaced by the air flow. Once the air flow dips below a threshold level, the flaps return to their closed position. Thus, the umbrella functions to provide shade or rain protection, but will not be damaged or blown about with a gust of wind as the cutout sections allow air to flow through the canopy.

Abstract: A portable sun and weather shelter is provided. The shelter comprises an umbrella foldable between open and closed positions. The umbrella has a center post, a canopy, and a frame to fold the canopy up and down. A pair of wings are attached to the perimeter edge of the canopy and can be extended outwardly beyond the canopy so as to increase the coverage area of the shelter so as to protect two or more people from the sun and rain.

Abstract: The invention adds one or more vertically-deployable sun shades to an umbrella for selectively providing shade for one or more users of an umbrella. More specifically, the sun shade resembles a conventional shade or set of blinds for covering a window. The size, shape, materials, and arrangement of the sun shade can vary according to user preferences or the intended manner or place of use.

Abstract: A portable sun and weather shelter is provided. The shelter comprises an umbrella foldable between open and closed positions. The umbrella has a center post, a canopy, and a frame to fold the canopy up and down. A pair of wings are attached to the perimeter edge of the canopy and can be extended outwardly beyond the canopy so as to increase the coverage area of the shelter so as to protect two or more people from the sun and rain.

Abstract: An umbrella having a central shaft, a spindle slidably disposed on the shaft, a first plurality of radially extending ribs hingedly attached to the shaft, a second plurality of radially extending ribs secured at first ends thereof to the spindle and secured at second ends thereof to respective ones of the first plurality of ribs and an umbrella canopy supported by the first plurality of ribs, the canopy secured to the first ends of the first plurality of ribs adjacent to the second end of the central shaft and secured to the second ends of the second plurality of ribs at an outer perimeter of the canopy, wherein the canopy includes one or more single-canopy umbrella panels, and one or more double-canopy umbrella panels and wherein the double-canopy umbrella panels includes an upper canopy and a lower canopy, and wherein only the lower canopy is secured directly to the ribs.

Abstract: A kind of rib structure in an umbrella with two layers of umbrella cover mainly uses a thinner metal bar to be bent and formed the sleeve rings and paralleled long and short skeletons, and circular rings are wrapped in the end of the long and short skeletons. The sleeve ring is used to be sleeve-set directly on the position close to the mounting seat of the last folded rib with rounded bar shape in the umbrella rib. A front edge of the upper layer umbrella cover is fix-mounted on the upper rib-mounting nest of umbrella, and its lower edge is mounted on the circular ring of the long skeleton by the silk wire. The front edge in the lower layer of umbrella cover is mounted on the circular ring of the short skeleton by the silk wire, and its lower edge is mounted on the ball tail of the last folded rib by the silk wire. The upper and lower layers of umbrella cover can be linked by this independent sleeve-set method without the need of change in original elements of the umbrella rib.

Abstract: A ventilated umbrella includes a foldable frame, upper canopy and lower canopy. An upper and lower stopping rings with certain interval there between are disposed under the upper notched ring of the main shaft while a notched ring for string is slidable between the two stopping rings and a compression spring is between the notched ring for string and the lower stopping ring. A plurality of radial vertical slots with larger inner slots and smaller outer slots are disposed evenly on the notched ring for string so that one end of a plurality of strings is set into the vertical slot and restrained by a ring while the other end is connected to upper circumference of the lower canopy. And the connection point is located under a horizontal line formed by joints between the main ribs and the stretchers. Thereby a plurality of strings is easy to attach on the notched ring for string.

Abstract: An umbrella is provided that comprises a canopy and a support structure upon which the canopy is supported. The canopy can comprise a first panel and a second panel. The support structure can comprise a spacer configured to provide a gap separating the first and second panels to permit air to be vented through the canopy. A method of venting an umbrella is also provided wherein the method comprises providing a plurality of gaps in the canopy extending substantially horizontally, when the umbrella is open, between at least one pair of adjacent ribs and located along the at least one pair of adjacent ribs, and providing a plurality of spacers mounted on the at least one pair of adjacent ribs to open the gaps when the umbrella is on use.

Abstract: The invention relates to a rib structure of a two-layer cover umbrella, which mainly includes an elastic rib having an inner folded end. A connector of a related primary rib of the umbrella is provided with an aperture, for that the inner folded end of the elastic rib is penetrated into the aperture and connected with a lateral rod of the connector. The elastic rib will be then extended outward alone the upper surface of the primary rib smoothly for connecting the upper cover and providing a utilized umbrella with two covers.

Abstract: An umbrella includes an umbrella support, a plurality of umbrella ribs that are installed on an upper portion of the umbrella support and that are capable of being folded, a plurality of support ribs respectively supporting the umbrella ribs, a slider to which an end of each of the support ribs is hingedly coupled and which slides along the umbrella support to fold or unfold the umbrella ribs and the support ribs, and a canopy giving a user shelter from rays of the sun, rain, or snow. The canopy is divided into an upper canopy installed on upper portions of the umbrella ribs and a lower canopy installed on lower portions of the umbrella ribs. A space is formed between the upper and low canopies when the umbrella is unfolded.

Abstract: An advertisement umbrella includes a central post, a runner, a crown, ribs and associated stretchers, a top sphere and a canopy. The canopy has a multiple layer structure including an outer layer and an inner layer between which an illuminant is installed. The central post includes a tubular member in which batteries are accommodated to supply electricity to the illuminant, allowing light from the illuminant to transmit through the canopy and present colorful advertisement frames consisting of different characters and patterns on the umbrella canopy.

Abstract: An umbrella canopy having one or more single-canopy panels and one or more double-canopy panels. An umbrella having a central shaft, a spindle slidably disposed on the shaft and movable between a first position and a second position, a first plurality of radially extending ribs hingedly attached at first ends thereof to the shaft and terminating at second ends, a second plurality of radially extending ribs secured at first ends thereof hingedly to the spindle and secured at second ends thereof to respective ones of the first plurality of ribs and an umbrella canopy supported by the first plurality of ribs, wherein the canopy includes one or more single-canopy umbrella panels, and one or more double-canopy umbrella panels.

Abstract: Disclosed herein is a reinforced structure for collapsible and wind resistible umbrella comprising a telescoping backbone, an upper and a lower nests, a plurality of multi-sectionalized main umbrella ribs and auxiliary ribs, a first and a second umbrella covers, and a plurality of resilient bands. An elaborately designed jointing technique is applied to joint these main and auxiliary ribs so as to substantially reinforce the mechanical strength of the umbrella to withstand the wind force. The last section of each main rib divided into parallelly laid, shorter first subsection and longer second subsection makes it possible to lay two umbrella covers in a manner leaving a fissure therebetween so as to release the wind flowing out. Furthermore a resilient band is provided between each first subsection of the main rib and the second umbrella cover that contributes to keeping a definite separation between the first and second subsections of the main rib so as to prevent the umbrella from overturning.

Abstract: An umbrella assembly providing a dihedral shelter atop a pole which can be deployed to different dihedral angles and retracted to a compact configuration. It further includes a vent port in a cavity which is overhung by a positively positioned vent port cover.

Abstract: Garden and beach umbrella, usually used for protection from sun, as we need to cover a relatively large area to be used by several persons the umbrella should be large enough to achieve this task, therefore the intensive wind currents usually have bad effects on the stability of this kind of umbrellas due to its relatively large covering area. Creating gaps or holes through the umbrellas surface can reduce or minimize the bad effects of the wind against the umbrella while it still capable to protect users against direct sun. The present invention relates to a “See Through Umbrella”, which is an umbrella with a surface consists of several concentric polygons of fabric stripes of well designed width and fixed distance separating each adjacent two stripes to allow wind currents to pass through the surface easily leading to high degree of stability against blowing wind. This kind of umbrellas can be of two main different patterns either completely (as in FIG. 1) or partially (as in FIGS.

Abstract: The invention relates to a rib structure of a two-layer cover umbrella, which mainly includes an elastic rib having an inner folded end. A connector of a related primary rib of the umbrella is provided with an aperture, for that the inner folded end of the elastic rib is penetrated into the aperture and connected with a lateral rod of the connector. The elastic rib will be then extended outward alone the upper surface of the primary rib smoothly for connecting the upper cover and providing a utilized umbrella with two covers.

Abstract: The structure of the umbrella comprises improved ribs for engaging with the strip portions of the cover. Each rib includes a metal structural shape or component (32) and a plurality of saw-tooth components (34) engaged with said structural shape/component and capable of fixing strip portions (18) of the cover thereto.

Abstract: An umbrella assembly providing a dihedral shelter atop a pole which can be deployed to different dihedral angles and retracted to a compact configuration. It further includes a vent port in a cavity which is overhung by a positively positioned vent port cover.

Abstract: An umbrella includes an umbrella support, a plurality of umbrella ribs that are installed on an upper portion of the umbrella support and that are capable of being folded, a plurality of support ribs respectively supporting the umbrella ribs, a slider to which an end of each of the support ribs is hingedly coupled and which slides along the umbrella support to fold or unfold the umbrella ribs and the support ribs, and a canopy giving a user shelter from rays of the sun, rain, or snow. The canopy is divided into an upper canopy installed on upper portions of the umbrella ribs and a lower canopy installed on lower portions of the umbrella ribs. A space is formed between the upper and low canopies when the umbrella is unfolded.

Abstract: An umbrella includes a shaft with a runner movably mounted thereto and a first cap and a second cap are respectively connected to a top end of the shaft. The first cap is located closer than the second cap to the second end of the shaft. A plurality of first ribs pivotably connected to the second end cap and a main panel is mounted to the first ribs. The main panel has a hole with a center at the shaft. Each first rib has a join connected thereto and each joint having a first passage through which the first rib extends and a second passage through which one of second ribs extends. Each second rib has a first end thereof pivotably connected to the first cap and a section of the second end of each of the second ribs is overlapped on the main panel. A sub-panel is attached to the second ribs and covers the hole in the main panel. A plurality of stretchers are pivotably connected between the runner and the joints.

Abstract: A ventilator for a covering for a boat or other object includes a dome for covering air venting openings. The air vents are provided in a pair of oppositely disposed ventilator plates. The boat or other covering is firmly clamped between the ventilator plates by means of a nut that can be tightened by hand. The venting openings are disposed one above the other with no obstructions therebetween in order to allow for direct air transfer between the inside and the outside of the cover while preventing weather elements from entering the cover.

Abstract: Disclosed herein is an new structure of a two tiered vented canopy wind resistant umbrella. The front portion of each umbrella rib is divided into parallel, but different lengthed first and second rib sections on which two mutually overlapped umbrella covers are laid on forming a fissure therebetween so as to release the wind force. Moreover, several spring elements are intercalated in the fissure between the two umbrella covers so as to protect the first rib sections form over flexing or even breaking due to strong wind force.

Abstract: An umbrella for releasing wind includes a few dozens of holes on the top of cloth and a few dozens of sleeve-shaped channels affixed over each hole. The diameter sizes of the holes are different. The sleeve-shaped wind-release channel is a hollow cylinder. It has a bigger and a small end. The big end of the sleeve is directly attached to the hole on the top of surface. The small end of the sleeve has curved finish. When the wind blows into the channel from inside of umbrella, the sleeve-shaped channel becomes erect so the wind is discharged through the hole, the channel and the small side of the sleeve.

Abstract: A windproof umbrella resistant to inversion from the wind and effective in ventilation is disclosed. A frame of the umbrella comprises a hub and upper and lower rings on the shank. A canopy of the umbrella comprises lower, intermediate, and upper canopies all being concentric and in a partial covering relation between any two adjacent ones. Ropes are interconnected between centers at sectors of an upper peripheral edge of the lower canopy and through holes of the upper ring by looping. Hence, lower and upper openings between the overlapped areas of the canopies are formed for air escape when wind caught beneath the canopy assembly applies pressure to an inner surface of the canopy assembly.

Abstract: An umbrella facet connecting mechanism which mainly comprises the umbrella facet connection, there is a bending position on said umbrella facet connection, and there settles a connecting portion on two ends portion and the bending portion respectively; the connecting portion on one end of the umbrella facet connection is fixed and connected with the second umbrella facet, whereas another end portion and the connecting portion on bending being fixed and connected with the first umbrella facet so that the peripheral of the first umbrella facet overlaps and connects with that of the second umbrella facet and there keeps a space so when the umbrella facet is on the accepting wind facet said stream could be vent from the space between the overlap position of the first and the second umbrella facet to avoid the flip-out of the major bone of the umbrella to achieve the purpose of anti-winds as well as elonger the usage lifetime of the umbrella.

Abstract: A double-story umbrella includes an upper umbrella formed by an upper umbrella cloth; a lower umbrella having a shaft and a rib assembly pivotally secured to the shaft for securing a lower umbrella cloth on the rib assembly; a plurality of detachable restorable buckling devices each coupling the upper umbrella cloth with the lower umbrella cloth; and a supporting device adjustably detachably secured on a lower portion of the shaft and operatively anchored on or under a ground for stably erecting the shaft and the double-story umbrella.