Abstract: A heavy duty excavator bucket is constructed with an exoskeletal structure comprising coupled cast components including a lip member, opposed wing members, junction members locatable between floor and side walls and side and rear walls and a cap rail structure extending between opposed wing members about the upper periphery of the bucket to form an integral structure. Steel plate floor, side wall and rear wall members extend between adjacent exoskeletal regions. The bucket may include a cast arch member extending between opposed wing members and a cast reinforcing member extending between opposed junction members adjacent said rear wall.

Abstract: A stand 18 is maintained under a stored posture when the stand 18 is pivoted toward the stored posture side in association with a dumping actin of a bucket 13 and a lock mechanism 25 is switched to a locking state. The stand is switched to an in-use posture when the lock mechanism 25 is switched to a releasing state while the stand 18 is maintained under the stored posture by the lock mechanism 25.

Abstract: An equalizer assembly for a mining machine includes a single piece cast equalizer having a first end and a second, opposite end. The assembly also includes a first end cap configured to be coupled to a dipper of the mining machine, the first end cap including a first bushing configured to receive the first end of the equalizer. The assembly also includes a second end cap configured to be coupled to the dipper of the mining machine, the second end cap including a second bushing configured to receive the second end of the equalizer.

Abstract: A scraper having a frame with a first removable sidewall removably coupled to the frame, a second removable sidewall removably coupled to the frame, a rear bucket pivotally coupled to the frame and having a dump position and a carry position, the rear bucket comprising a first rear sidewall positioned on a first side of the rear bucket and a second rear sidewall positioned on a second side of the rear bucket. Wherein, the first removable sidewall is positioned adjacent to the first rear sidewall and the second removable sidewall is positioned adjacent to the second rear sidewall. Further wherein, as the rear bucket transitions between the carry position and the dump position, the first and second removable sidewalls move relative to the surface of the corresponding first and second rear sidewalls.

Abstract: A system for uncovering a trench. The system comprises several subsystems, including a work machine and a frame for providing a seal with the surface to be trenched with a saw blade contained therein. The blade is supported on a hub which is slidably movable relative to the frame by operation of a linear actuator, which may be a hydraulic cylinder or the like. The vertical location of the blade within the frame is continuously adjustable to create a deeper or shallower trench. A monitoring system is provided to monitor the vertical location from an operator station.

Abstract: A cabin includes: a panel disposed on a side of an operator seat, the panel including: a plurality of cross members extending in a first direction; and a plurality of transverse members intersecting with the plurality of cross members each other and extending in a second direction; a glass panel disposed on a side of the panel; a window frame disposed on the glass panel; a window panel disposed on the window frame, the window panel being configured to move in the first direction or in the second direction; a projecting member disposed on a side of the window panel, the side being an identical side to the operator seat, the projecting member being configured to move together with the window panel; and a guide portion configured to accept insertion of the projecting member and to limit a moving distance of the window panel.

Abstract: A shovel includes a turning hydraulic motor, a hydraulic cylinder, a pilot circuit, a hydraulic control valve, a variable throttle, and a controller. The turning hydraulic motor is driven with hydraulic oil supplied from the hydraulic pump to drive a turning body of the shovel to turn. The hydraulic cylinder is driven with the hydraulic oil supplied from the hydraulic pump. The pilot circuit controls a pilot pressure in accordance with the operation of an operation lever. The hydraulic control valve controls the hydraulic oil supplied from the hydraulic pump to the hydraulic cylinder in accordance with the pilot pressure supplied from the pilot circuit. The opening of the variable throttle varies in accordance with the operating state of the operation lever. The controller changes the opening of the variable throttle.

Abstract: A pressure compensation unit includes: a control valve controlling hydraulic fluid supply and discharge to and from an actuator, the control valve including a pump port, a pair of relay and supply/discharge ports, and a tank port; a pressure compensation valve connected to the relay ports by an upstream and downstream-side relay lines, the pressure compensation valve moving in accordance with a pressure difference between upstream-side relay line and signal pressure; a load pressure detection line branching from the downstream-side relay line; a relief line connected to the downstream-side relay line and having a relief valve; and a switching valve leading: a maximum load pressure to the pressure compensation valve as the signal pressure when the hydraulic fluid does not flow through the relief line; and a pump pressure to the pressure compensation valve as the signal pressure when the hydraulic fluid flows through the relief line.

Abstract: A boom is attached to a body. A boom pin supports the boom while being swingable with respect to the body. A through-hole is made in the body. The through-hole is made such that a member (for example, the boom pin or a boom angle detector) that recognizes a position of the boom pin can be observed through the through-hole from a side of a hydraulic excavator.

Abstract: A modular apparatus for water production from atmospheric air includes: a first parallelepiped module having an inlet opening, an outlet opening, a ventilator, to force an air flow to cross an internal volume of the first module, a condensation unit, located internally of the first module that intercepts the air flow, and a collecting tub for collecting the condensation water; and a second parallelepiped module containing a refrigerating unit including a portion of a refrigerating circuit in which a refrigerating fluid circulates and an evaporator to cool the air flow inside the condensation unit; the first module and the second module are reciprocally fixed at a respective interconnecting face. The second module having an interconnecting face having a width equal to twice a width of an interconnecting face side of the first module.

Abstract: An assembly for a shower system having first and second shower members and connectable to a water supply with a supply pipe having a pipe outlet. The assembly includes an adjustable supply assembly and a diverter valve. The adjustable supply assembly includes an adapter coupleable to the pipe outlet, a supply member having a supply outlet and coupled to the adapter for movement along the axis, and a seal positioned to provide a sealed connection in adjusted positions. The diverter valve includes a valve inlet in fluid communication with the supply outlet, and first and second valve outlets in fluid communication with the first and second shower members, respectively. The shower system is mounted in an enclosure having a wall. The adapter connects to the pipe outlet on one side of the wall, and the diverter valve is located on another side of the wall.

Abstract: A drain assembly for a sink has an abutment surface (14) for abutting an underside of the sink around the drain aperture, and a first wall portion (16) circumscribing an upper drain volume (18). A down-flow conduit (20) and an up-flow conduit (24) are delineated by a second and third wall portions (22, 26), one of which has an edge defining a lip (28) between the down-flow conduit (20) and up-flow conduit (24). An outlet (30) is connected to up-flow conduit (24). A removable lower cover (32) attaches to the wall portions so as to complete a flow path from the down-flow conduit (20) to the up-flow conduit (24) so as to form a trap. At least the first, second and third wall portions (16, 22, 26) and the outlet (30) are integrally formed as a unitary body, most preferably by an injection molding process.

Abstract: An undermount sink and countertop combination for use with a sink cabinet. The sink cabinet includes a sink-receiving opening and a sink cabinet width and depth. The sink includes a basin that is sized and shaped to be received within the sink-receiving opening. The basin includes side wall portions, an upper outer perimeter surrounding the side wall portions, and a bottom portion. A mounting flange extends from the upper outer perimeter of the basin. The mounting flange is shaped to rest atop the cabinet and underneath the countertop and is sized with a mounting flange width and depth substantially equal to the sink cabinet width and depth.

Abstract: The present invention relates to a stabilizer support 10 and a method of using the stabilizer support 10 to support a laterally unsupported surface 100. The stabilizer support 10 has a longitudinally extending rigid beam 20, a clip 30, and a foot plate 40. The beam 20 has a longitudinal length 21, a longitudinal first end 22, and a longitudinal second end 23. The beam 20 is marked at graded intervals 50 along its longitudinal length 21. The clip 30 is configured and arranged to engage the first longitudinal end 22 of the beam 20 and the foot plate 30 is configured and arranged to engage the second longitudinal end 23 of the beam 20.

Abstract: The invention relates to a mobile sanitary device, comprising a bowl having an upper opening, a water storage tank which is connected to the bowl via a water conduit that supplies water from the water storage tank to the bowl, a wastewater tank which is connected to the bowl via a wastewater line that discharges the wastewater out of the bowl from a bowl outlet opening to the wastewater tank, a first intermediate tank which is inserted into the water conduit between the water storage tank and the bowl or into the wastewater line between the bowl outlet opening and the wastewater tank.

Abstract: An example drain apparatus includes a drain body for connection to a plumbing system. The example drain apparatus also includes a top drain assembly having a compressible fitting, the top drain assembly configured for removable installation within the drain body. An example drain system includes an apparatus having a drain body and a top drain assembly for installation with the drain body. The example drain system includes a jig configured to cut the drain body below an upper surface of a floor the drain body is installed in so that the top drain assembly is fitted to the drain body substantially level with the upper surface of the floor.

Abstract: A water inlet protection system and apparatus for removing sediment and/or chemical from water or other fluids is provided. The system may include a filtration material that is configured to be water permeable and to collect sediment within the water. The system may be configured to be removably secured to various types of storm drains or water inlets. The system may include a frame configured to be removably attached to a storm grate. The frame may also include a plurality of tabs extending from the frame and be slidably adjustable. The system may also include an s-clip member or magnets for removably securing the filtration material to a storm drain or water inlet. Furthermore, the water inlet protection system may include one or more over-flow protection openings. The over-flow protection openings may include a raised member or barrier to regulate the water level where over-flow occurs.

Abstract: A forward articulating cleaning and removal apparatus for cleaning a drainage structure. An example apparatus includes a housing to extend into a structure to be cleared and/or removed, through an open end of the structure to be cleared. The example apparatus also includes a distal edge formed on the housing to cut or loosen debris. At least one coil within the housing moves the cut or loosened debris away from the distal edge formed on the housing to a proximal end of the housing. A debris escape opening is formed in the proximal end of the housing. A stem at the proximal end of the housing is provided for connecting to a rotational power source to drive the housing. The example apparatus includes at least one cutting edge on the distal edge of the housing and/or the at least one coil within the housing.

Abstract: A system for creating a cementitious building includes a support structure comprising a plurality of support members, and an inflatable rigidizable structural (IRS) form. The IRS form comprises a plurality of geosynthetic cementitious composite mat (GCCM) sections having GCCM configured to absorb water and rigidize in response to hydration, each GCCM section being coupled to another GCCM section of the plurality such that the IRS form is pneumatically inflatable.

Abstract: This invention provides connector assemblies comprising at least two connector elements pivotally joined to each other, wherein each connector element is configured for attachment to a natural tree pole such as bamboo. Useful connector elements include members configured to conform the surface of a natural tree pole. Useful connector elements include terminal connector elements configured for attachment to the terminal end of a natural tree pole and side connector elements configured for attachment to the side of a natural tree pole.

Abstract: A connection between a first, supporting structural member, such as a post or header, and a second, supported structural member such as a joist or rafter is provided, wherein the connection is made with a connector and fasteners, the use of which can be substantially hidden from view. The connector is designed to be inserted in a slotted opening in the second, structural member and to attach to a surface of the first, supporting structural member.

Abstract: A bistable collapsible compliant mechanism including a first sub-mechanism comprising opposed first and second quaternary links and multiple binary links, each link being connected to at least two other links in the sub-mechanism, and a second sub-mechanism connected to the first sub-mechanism, the second sub-mechanism also comprising opposed first and second quaternary links and multiple binary links, each link being connected to at least two other links in the sub-mechanism, wherein the bistable collapsible compliant mechanism can be alternatively be placed in a stable extended orientation in which the bistable collapsible compliant mechanism has a trapezoidal shape and in a stable contracted orientation in which the bistable collapsible compliant mechanism has a polygonal spiral shape.

Abstract: A corner construction with improved warping flexibility may feature two panels, or walls, hinged together to form a corner and then hinged to the underlying building structure or adjacent wall construction. Any flexible connection between the two panels in the central corner and the panels and underlying building structure or wall construction may be utilized, including hinges and flexible plate supports.

Abstract: A plenum housing includes a plurality of construction panels and a plurality of compression seal groove connectors secured between the plurality of construction panels. Each of the plurality of compression seal groove connectors includes a recess having at least one interior surface with at least one compression seal groove.

Abstract: A water resistant expansion joint system for installation into a building joint in vertical and horizontal configurations is designed such that it can be used for either an inside or outside corner. According to an aspect, the system comprises open celled foam having a water-based acrylic chemistry infused therein. A layer of an elastomer is disposed on the open celled foam and is tooled to define a profile to facilitate the compression of the expansion joint system when installed between coplanar substrates. The system is delivered to a job site in a pre-compressed state ready for installation into the building joint.

Abstract: An apparatus, method and system of insulating a building such as a poultry barn uses netting structurally of the type to hold sod together. The netting is stapled to the bottom of trusses making up the ceiling of a barn and the attic of the barn. Ceiling material is superimposed below the netting to form a ceiling. Loose insulation, typically fiberglass, is blown onto the netting to be held thereby and to form an insulation layer in the attic of the barn.

Abstract: A corrugated metal deck assembly including an elongated corrugated metal deck portion having substantially longitudinally extending, generally U-shaped peaks and valleys. One or more support channels are formed integrally with the corrugated metal deck portion prior to casting concrete thereon. Each of the support channels are configured with a generally U-shaped cross-section having generally opposed side walls having leg portions extending generally laterally inwardly from the corresponding side walls and defining a slot facing generally downwardly from the corrugated metal deck. The support channels are adapted for receiving therethrough and supportably engaging at least portions of anchors or support items. The slots may be provided with one or more internal threads into which externally threaded portions of anchors or support items may be screwed to fixedly attach the anchors or support items to the one or more integrated support channels.

Abstract: The structural system of steel walls and plates with bioclimatic and sound application relates to the creation of a general structure of buildings, walls, roofs and soils with thermal and sound isolation from an earthquake-resistant steel structure of hollow beams and columns complemented with walls and plates in oval piping made of steel, which may be installed both vertically and horizontally with their own fixation means in a building for air recirculation, with interconnected and addressed tubular structures which contain thermal and sound isolation materials controlling airflow in the to modify the weather and/or sound conditions inside the building.

Abstract: A rigid insulating panel comprising an insulating material core with an R-value of at least 2.5 (hr·ft2·° F.)/BTU·in. The insulating material core has opposed first and second surfaces, a pair of spaced-apart longitudinal edges, and a pair of spaced-apart lateral edges extending between the pair of longitudinal edges. At least one of the pair of longitudinal edges and the pair of lateral edges comprises connecting members including a tongue and groove assembly with an inner groove and an outer tongue separated by a substantially S-shaped median wall. The tongue and groove assembly is engageable with the tongue and groove assembly of an adjacent insulating panel to provide a flexible interconnection therebetween. The rigid insulating panel also comprises at least one membrane covering one of the first surface and the second surface. An assembly method for insulating a concrete surface of a building using an assembly of insulating panels is also provided.

Abstract: Provided are a structure and a method of forming a structure that includes a core made, at least in part, of a rice hull composition. The rice hull composition including a combination of separate, unground rice hulls; ground rice hulls; and a rice hull powder, that each have a different particle size. A polymeric binder, such as a recycled plastic polymeric binder binds the separated unground rice hulls, the ground rice hulls and the rice hull powder together.

Abstract: A precast concrete wall structure and method for forming a wall structure are disclosed. A forming member is positioned within a casting bed. The forming member comprises a layer of insulating material defining a plurality of integrally-formed rectangular protrusions extending in a parallel and spaced-apart relationship to one another to define a plurality of rectangular-shaped channels therebetween. The forming member also defines at least one cutout for defining a first portion of a fastener for securing the wall structure to a support structure. A second portion of the fastening member is positioned within the cutout. Uncured concrete is placed within the casting bed and allowed to cure.

Abstract: This invention presents a wall mounted receiver to accommodate insulated or non-insulated pipes and at least one inlet or portal for at least one pipe conduit or wiring per portal and with a high degree of flexibility and unique mechanical connection security; this receiver is arranged to receive the piping from any directional angle with a unique flexible inlet capability; without limitation, this receiver is for use with refrigeration or air conditioning equipment and related connections, such as insulated pipes, non-insulated pipes, condensation piping, conduit and wiring. The receiver can be mounted to different wall surface types without the assistance of a wall bracket; can also be fit into tight space service areas depending on refrigeration equipment requirements; can be installed in new construction applications; and can also upgrade existing installations without the need to cut the existing piping.

Abstract: An open barrier frame in an inverted U-shaped configuration has an upper horizontal and two laterally spaced vertical segments. The segment has an interiorly facing indentation with a width and a thickness. A lower closure segment with lateral ends is coupled to the vertical segments. The closure segment has a generally rectangular cross sectional configuration with a vertical slot. In this manner the barrier frame creates a rectangular channel. A panel insert has a width and a thickness essentially equal to the width and thickness of the U-shaped indentation. The panel insert has an upper edge extending into the indentation of the horizontal segment. The panel has a lower edge extending into the slot of the closure segment and terminating at an intermediate elevation of the slot.

Abstract: The self-locking metal framing connections between support members and the crossing longitudinal spacing-bracing members can occur at the hole, at the top and bottom ends of the support members as well as the end-to-end connections between longitudinal spacing-bracing members. Connecting the hook tab with a notched-tab to a receiver hole in the adjacent web allows the longitudinal spacer brace to pivot horizontally and if the hook tongue with the notched tab and the receiver hole are in the flanges, the spacer braces can pivot vertically. Short longitudinal spacer braces with receiver holes and hook tongues with notched-tabs, key hole bendable tabs, different shaped spacer braces, different variations in the hole notches, notched tabs in the hole bottom edge, diagonal framing between holes and longitudinal spacing-bracing members having notched-tab receivers can be installed in the lip notches or the horizontal spacing-bracing member and/or into the slot holes of the flanges of another spacing-bracing member.

Abstract: A heat shrinkable tube-covered rebar basically solves a problem of corrosion of a rebar embedded in a concrete structure by covering the rebar with a heat shrinkable tube, which is a polymer material, and a thermosetting resin to prevent the rebar embedded in the concrete structure from corroding, and easily integrates a reinforcing bar with the heat shrinkable tube and perform a first anti-corrosion treatment on the reinforcing bar by applying a thermosetting resin between the reinforcing bar and the heat shrinkable tube.

Abstract: During installation of a single-ply roofing membrane, the surface of the membrane can be protected from dirt, scratches and scrapes by a protective sheet which also provides other beneficial attributes that aid an installer. A roof laminate includes a roof membrane and a protective sheet is removably affixed thereto. The sheet includes at least a first layer directly secured to a second layer. The first layer provides at least one of UV protection, anti-slip, and anti-glare to the roof laminate and so aids the installer in at least one of those respects. The second layer is removably affixed to the roof membrane.

Abstract: Certain exemplary embodiments can provide a system, device, method, and/or composition of matter configured and/or adapted to manage water received upon a raised pedestal paver system, the raised pedestal paver system comprising an array of elongate pedestals, the raised pedestal paver system further comprising substantially planar array of pavers, each pedestal from the array of elongate pedestals configured to partially vertically support at least two substantially adjacent pavers from the array of pavers.

Abstract: A support assembly for a screen enclosure includes a collar device having a sleeve section with a central passageway for receiving an upright post of the enclosure and permitting the sleeve section to be adjustably positioned and fastened to the post. At least one channel is attached exteriorly to the sleeve section for receiving and being secured to a respective structural beam such that the beam is supported by and extends transversely to the upright post. The structural beam includes wide front and back face sections interconnected by narrow top and bottom side sections. At least one of the face sections has a spline groove formed longitudinally therethrough for receiving a screen panel and complementary spline component to secure the screen panel to the structural beam.

Abstract: An example of conversion of solar energy into other forms of useful energy is taking heat from an area below a roof and using the heat to generate mechanical energy or electrical power. An air duct opening is placed in a hottest area under the roof. An air fan is placed in the air duct to draw the heated air from the area below the roof. A heat exchanger coil is placed inside the air duct. A return air duct is routed back to the area below the roof. The heat exchanger coil is coupled to a turbine through a closed loop line. A heat transfer medium pump, a first valve and a second valve are retained in the closed loop line. The first valve, second valve and pump are used regulate heat transfer medium into and out of the turbine. An electrical generator may be connected to the turbine.

Abstract: A simulated brick includes a polymeric core member (20), a mesh layer (30) adhered to the core member, a basecoat layer (43) covering an entirety of the mesh layer, and a finish layer (46) covering an entirety of the basecoat layer. The core member, the mesh layer, the basecoat layer, and the finish layer together define a brick profile portion (11) having first and second lateral sides extending to a planar outer surface to define a first thickness, and an offset portion (12) extending from the first lateral side of the brick profile portion to a lateral end surface and having an outer surface defining a second thickness smaller than the first thickness, the brick profile portion and the offset portion together defining a planar rectangular base surface (16) extending from the second lateral side of the brick profile portion to the lateral end surface of the offset portion.

Abstract: A set of panels for covering floors, ceilings or walls is disclosed. Specifically, sets of panels including a plurality of panels joined with a mechanical locking at their adjacent edges. Each of the panels includes at least two pairs of parallel side edges. When the panels are installed in rows, the adjacent edges of two adjacent panels in one row are locked to one another and the adjacent panels of the adjacent rows are locked to one another. Locking provides connecting while preventing movement spacing the locked panels apart in a direction perpendicular to the coupled side edges by a translation in the plane of the bottom surface of the panels, and preventing movement spacing the locked panels apart in a direction perpendicular to the coupled side edges by a translation in a plane perpendicular to the bottom surface of the panels.

Abstract: A joint tape embedding apparatus configured to determine the bonding and/or “feel” of embedding joint tape into a dry wall or wall board joint using a particular joint compound. The joint embedding apparatus is configured to allow the same user or different users to accurately repeat the determination of the bonding and/or “feel” attributes of the joint compound.

Abstract: An ergonomic drywall hawk used to provide staging of drywall joint compound, provides enhanced ergonomic features. The hawk includes a flat upper surface plate having a subjacent horizontal handle in lieu of a conventional vertical handle. The horizontal handle provides improved hand and wrist positioning resulting in reduced risk of wrist or hand pain or other ergonomic injuries.

Abstract: A rebar tying device is configured to tie a plurality of rebars by a wire. The rebar tying device includes a feeder configured to feed the wire wound around a reel by a rotation of a feeding motor; a guide configured to guide the wire fed by the feeder to around the plurality of rebars; a cutter configured to cut the wire fed by the feeder at a predetermined position; a twister configured to twist the wire around the plurality of rebars; a battery configured to supply power to the feeding motor; and a control unit. The control unit configured to control a feeding length of the wire by controlling an energizing time of the feeding motor based on a predetermined feeding length of the wire.

Abstract: A bracket to hold a bricklayer's speed lead in position on a wall. The bracket, which is contoured to fit the speed lead, has two vertical flanges, one of which has the same or a larger vertical dimension than the other, a horizontal flange extending perpendicularly between the vertical flanges, and a stepped block beneath part of the horizontal flange at right angles to the horizontal flange and one of the vertical flanges. The bracket is also provided with a rotatably mounted cam and a rotatably mounted bushing.

Abstract: [Summary] A shell element that can be formed simply and in a short time, a shell structure using the shell element, and a structure forming set that can form the shell element simply and in a short time are provided. Resin material is foamed on the inside of thin film, a foamed material portion with bubbles being mixed is in the state of being sandwiched by the thin film and a solid layer, and tensional stress is applied to the thin film and the solid layer and compressive stress is applied to the foamed material portion, thus the shell element is difficult to be cracked or split, and the shell structure is formed by the shell element. And, the shell structure forming set forms the shell structure easily.

Abstract: A waterjet apparatus can be installed a wall for containing an artificial body of water, such as a pool bottom and/or sidewalls. The waterjet apparatus can be used with an intermittently operated water delivery system to clean pool bottom and/or sidewalls. The waterjet apparatus has a plaster attachment device for securing a plaster mixture to the waterjet apparatus The plaster attachment device can protrude from or be substantially flush with the pool bottom and/or sidewalls.

Abstract: An alignment plate for mounting of a structure to a foundation includes: a generally planar main body having a center, a length direction and a width direction that is perpendicular to the length direction; and a plurality of first mounting slots in the main body and a plurality of second mounting slots in the main body, wherein the first mounting slots extend in the length direction and the second mounting slots extend in the width direction.

Abstract: A columbarium system and corresponding method of assembly is disclosed. The columbarium system includes niche cabinets, braces, brackets, face plates, and face plate security hardware. The niche cabinets are stackable in columns and rows to form a columbarium. The braces fit between front lip segments of adjacent niche cabinets. The brackets comprise bracket arms and face plate knobs. Bracket arms extend into braces, and face plate knobs support face plate corners. Face plates cover front sides of each niche cabinet. Face plates are supported and positioned by the face plate knobs, and face plates are secured in place by face plate security hardware. Shims may be inserted between adjacent niche cabinets to maintain spacing between the backs of niche cabinets.

Abstract: A portable shade shelter has a plurality of canopies including at least a first canopy and a second canopy. The first canopy is disposed over the second canopy, and the first canopy is capable of being spaced apart from the second canopy in a vertical direction such that air is capable of flowing between the first canopy and the second canopy. Each of the first canopy and the second canopy includes a plurality of openings configured to permit air and light to pass through the respective first canopy and second canopy.