Abstract: A device for covering a surface including a substantially rectangular cover (10) having first and second longitudinal edges each provided with a protruding convex bead (12) having a minimum diameter (d), two rails (6) including a groove, the opening (14) of which has a maximum width (Lo), a drum (2) that is able to move above the surface in order to deploy or retrieve the cover, an insertion system (16) for continuous insertion of the convex bead (12) into the groove. The convex head (12) of each longitudinal edge and the groove of the corresponding rail are configured such that, once inserted into the space (14e) by the insertion system, the convex bead occupying the space alone cannot be removed solely by the action of a force (F) applied parallel to the transverse axis (Y) in the direction of the surface to be covered.

Abstract: A method of manufacturing a cover for a spa includes the steps of vacuum molding a first shell member and a second shell member, bringing the first and second shell members into registration with one another to define a hollow cavity therebetween, and injecting a foam into the hollow cavity, wherein the foam is configured to bond with the shell members to create a unitary structural part that provides increased strength and rigidity.

Abstract: A roll-up spa cover for protecting and insulating an outdoor swim spa includes a multi-layer flexible insulation sheet structure is sized to at least cover a top of a spa and comprises at least two flexible layers. Support members may be attached to the plurality of support members in a parallel spaced relationship. Flexible rods can be removable located onto or into the support members to form an arcing framework over the support members. A rain fly may be overlaid on the flexible rods. The support members may include an angled aperture for receiving an end of the flexible rods and end caps may be provided over ends of the support members. The flexible rods are held in compression between the angled apertures and/or the end caps.

Abstract: Provided is a pool and/or spa cover leading edge that provides for minimal deflection across the width of the pool and/or spa, and in particular from 0 to less than or equal to 0.10 inches per 10 feet of width of the pool and/or spa. The pool and/or spa cover leading edge includes at least one fiber reinforced polymer composite with an axial length of from 5 feet to 50 feet with a linear weight per foot from 4 to 14 ounces per foot of axial length and an optional joiner for coupling together two or more composites. The composite includes at least one of continuous fibers or discontinuous fibers oriented at least partially in the axial direction and encapsulated by a thermoset or thermoplastic resin matrix. Also provided are pool and/or spa cover system and a method of reducing the deflection of a leading edge for a pool and/or spa cover.

Abstract: Described herein are embodiments of a lift assembly for assisting a user to move a spa cover on and/or off of a spa. The lift assembly includes a lever arm mount; a lever arm pivotally coupled to the lever arm mount; a spa cover crossbar coupled to the lever arm; and at least one pneumatic spring. The lever arm is pivotable between a cover closed position and a cover open position and in the cover closed position the pneumatic spring(s) urge the lever arm to rotate toward the cover open position. Optionally, the pneumatic spring(s) may urge the lever arm to also rotate toward the cover closed position. In some examples, the spa cover crossbar is shaped to limit bending and/or twisting thereof. Optionally, the lift assembly may include an overrotation inhibiter to limit the amount the lever arm can rotate away from the cover closed position.

Abstract: A movement assistance device for a spa cover having at least two spa cover portions each spa cover portion having opposing lateral peripheral edges, hinge and end peripheral edges and wherein the spa cover portions are movable one relative to the other from a first coplanar orientation to a second, stacked orientation, and a biasing pneumatic cylinder which cooperates with and extends between a first bracket secured to one lateral peripheral edge of one spa cover portion and a hinge bracket secured to the same lateral peripheral edge of the same spa cover portion adjacent the hinge peripheral edge and the hinge bracket is further secured to an aligned lateral peripheral edge of a second spa cover portion and adjacent to the hinge peripheral edge thereof, and wherein the pneumatic cylinder assists and controls the movement one spa cover portion relative to the other spa cover portion.

Abstract: A cover lift system for a spa includes a lifter handle having an upper arm and a lower arm telescopically connected to the upper arm, the upper arm being configured for operative connection to a cover of a spa, and the lower arm being configured for pivotal connection to a base of the spa, and an adjuster mechanism associated with the lifter handle for selectively adjusting a length of the lifter handle to allow for use of the lifter handle with spas of varying sizes.

Abstract: A spa cover constructed of layers of pliable insulation encapsulated within a weatherproof vinyl reinforced fabric or a rubber membrane which is attached to rigid square support tubes that run parallel to the short end of the spa. The encapsulated insulation is fastened to the bottom of the square support tubes with corrosion-free nylon anchors which allows the soft insulation assembly to span over the water and rest directly on the spa bartop surface sealing the heat in and keeping debris out. An arched fiberglass rod structure supports a weatherproof rainfly which is permanently affixed to the flat cover assembly to shed rain and debris. The entire assembly is held in place at each end with adjustable straps which stretch the cover from end to end keeping the rainfly taut. Removing the cover to access the spa involves undoing the straps on one end and rolling the cover assembly towards the other end until the desired amount of spa exposure is reached.

Abstract: The innovation relates to a pool covering system that is usable as a flooring surface. The pool covering system includes brackets and support beams spanning the pool opening. The beams provide structural support to cross members and flooring placed on top of the beams. The pool covering system does not require significant drainage of the pool and does not damage the pool structure during installation and use.

Abstract: A lift assembly for a spa cover is disclosed. The spa cover is for covering an open upper end of a spa. The lift assembly includes a lever arm having a first portion for supporting a spa cover, and a first end for pivotable coupling to a sidewall of a spa for rotation of the lever arm between a closed position in which the spa cover rests on the upper end of the spa, and an open position in which the spa cover is displaced from the upper end of the spa. The lift assembly also includes a resilient spring having a first end coupled to the lever arm, and a second end for coupling to the sidewall of the spa. In the open position of the lever arm, the spring urges the lever arm to rotate toward the closed position. A spa including the lift assembly is also disclosed.

Abstract: A spa cover is disclosed. The spa cover includes two separate and symmetrical halves comprising an insulating portion, a half hourglass-shaped insulating gasket, a resilient thermal gasket, and a tapered gasket spanning a bottom surface thereof and a sheet covering both halves. The two separate and symmetrical halves are joined by a hinge, which may be part of the sheet.

Abstract: The innovation relates to a pool covering system that is usable as a flooring surface. The pool covering system includes brackets that support beams spanning the pool opening. The beams provide structural support to cross members and flooring placed on top of the beams. The pool covering system does not require significant drainage of the pool or damage the pool structure during installation and use.

Abstract: A hard cover for spas, hot tubs and the like has an outer layer defining one or more cover portions that may be hinged together along a common top edge. Each cover portion internally includes a plurality of rigid panels, which may be made of expanded polystyrene or another rigid foam or the like. A support structure that mechanically couples and/or supports the panels is provided to improve the load-bearing capacity of the spa cover, optionally providing sufficient strength to conform to applicable safety standards. The support structure can include beams having various cross-sections, or combinations thereof, and may be provided in multiple segments that are shorter than the overall length of the cover. A vapor barrier film can be provided that encloses the panels and optionally some or all portions of the support structure to protect these components from degradation in the spa environment.

Abstract: A method of manufacturing an article for a spa includes laminating a cosmetic film to a base substrate; laminating an acrylic film to the cosmetic film, the base substrate, cosmetic film and the acrylic film forming a layered assembly, and forming the layered assembly to shape.

Abstract: A vehicle floor mat retainer includes a vehicle carpet portion including an engagement portion connected by a first hinge to a carpet retainer portion, and a vehicle floor mat portion including a cap portion connected by a second hinge to a floor mat retainer portion.

Abstract: A cover for a spa includes a first cover member and a second cover member hingedly connected to one another about a seam. The cover further includes a sleeve associated with of one of the cover members at an approximate midpoint between an outer edge of the cover member and the seam. The sleeve is configured to receive a connecting rod of a lifting mechanism therethrough for transmitting an uncovering and/or covering force from the lifting mechanism to the cover.

Abstract: A wave generating apparatus is provided, comprised of a wave pool, a wave generating chamber, and a filtration system. The filtration system comprises an intake, a pressurized return that releases water, and a filtration pump that pumps water from the intake to a pressurized return while filtering debris from the water. The pressurized return is located at a higher elevation relative to the intake. Water flows directionally from the pressurized return to the intake.

Abstract: A lift assembly includes a lever arm mounting portion connected to a spring mounting portion, a lever arm, a spa cover engaging portion, and a pneumatic spring. A pneumatic spring proximal end portion has a pivoting connection to the spring mounting portion. A pneumatic spring distal end portion has a pivoting connection to the lever arm. The pneumatic spring exerts an extensive force upon the lever arm both when the lever arm is in the cover closed position and when the lever arm is in the cover open position. The extensive force urges the lever arm towards the cover open position when the lever arm is in the cover closed position, and the extensive force urging the lever arm towards the cover closed position when the lever arm is in the cover open position.

Abstract: An apparatus, method and kit for controlling moisture under a hot tub cover comprising a planar sheet of flexible material having a peripheral edge corresponding to the shape of the hot tub cover, a plurality of connectors extending from the peripheral edge adapted to engage with the hot tub cover and at least one aperture through the planar sheet. The method comprising locating a planar sheet of flexible material having a peripheral edge corresponding to the shape of the hot tub cover to an undersurface of the hot tub cover, securing the planar sheet to the hot tub cover with a plurality of connectors extending from the peripheral edge adapted to engage with the hot tub cover, and draining moisture on a top surface of the planar sheet through at least one aperture through the planar sheet. The may be secured to a hot tub cover.

Abstract: A modular and multipurpose covering device for a pool includes a first modular covering tarpaulin forming a tailor-made safety cover made up of first tarpaulin elements which are joined together reversibly by transverse supports. A second modular covering tarpaulin is superimposed with the first tarpaulin and made up of second tarpaulin elements which are joined together reversibly by the same transverse supports. This second covering tarpaulin affords additional functions that can be modified according to the season. The two end transverse supports are coupled to lashing and tensioning mechanism for securing and holding down on ground covering device that is arranged over a pool.

Abstract: An electronic device includes a wireless communication circuit and one or more processors. The one or more processors are operable to the one or more processors to detect an inability of the wireless communication circuit to transmit an electronic communication that includes one or more temporally dependent content elements. When this occurs, the one or more processors monitor a duration during which the wireless communication circuit is unable to transmit the electronic communication. Later the one or more processors alter the one or more temporally dependent content elements as a function of the duration to obtain a modified electronic communication, which is transmitted from the wireless communication circuit.

Abstract: A lift assembly for a spa cover is disclosed. The spa cover is for covering an open upper end of a spa. The lift assembly includes a lever arm having a first portion for supporting a spa cover, and a first end for pivotable coupling to a sidewall of a spa for rotation of the lever arm between a closed position in which the spa cover rests on the upper end of the spa, and an open position in which the spa cover is displaced from the upper end of the spa. The lift assembly also includes a resilient spring having a first end coupled to the lever arm, and a second end for coupling to the sidewall of the spa. In the open position of the lever arm, the spring urges the lever arm to rotate toward the closed position. A spa including the lift assembly is also disclosed.

Abstract: A cover lift system for a spa includes a lifter handle having an upper arm and a lower arm telescopically connected to the upper arm, the upper arm being configured for operative connection to a cover of a spa, and the lower arm being configured for pivotal connection to a base of the spa, and an adjuster mechanism associated with the lifter handle for selectively adjusting a length of the lifter handle to allow for use of the lifter handle with spas of varying sizes.

Abstract: A fastener for securing livestock mats to a foundation having at least one recess includes a body formed from fiber-reinforced polymer material. The body has a shank with a first, terminal end and an oppositely disposed second end. The shank may be sized and shaped to be received into the recess in the foundation. A head at the second end of the shank includes an outer peripheral edge extending radially outwardly from the shank relative to a longitudinal axis of the shank. The shank further includes oppositely disposed first and second sides and a foundation engaging surface on at least a portion of at least one of the first or second sides. The foundation engaging surface is contoured to frictionally engage the foundation when the shank is received therein.

Abstract: An inflatable pool cover assembly includes a top disk that is positionable in a pool and float on water in the pool. A bottom disk is positionable in the pool and float on the water in the pool. A bladder is positioned between the top disk and the bottom disk and the bladder is inflatable to a selected diameter. The bladder is inflated to engage an inside surface of a perimeter wall of the pool thereby covering the water in the pool. A plurality of engaging members is each coupled to the bladder and each of the engaging members releasably engages the perimeter wall of the pool. An inflation unit is coupled to the top disk and the inflation unit is in fluid communication with the bladder. A cartridge is provided that is filled with a compressed gas. The cartridge is fluidly coupled to the inflation unit thereby facilitating the compressed gas to exit the cartridge and inflate the bladder.

Abstract: A spa includes a thermo-insulating cover having a carrier segment and a carried segment rotatably connected to each other along an axis or rotation, the carrier segment rotatably mounted along an axis of rotation on and above a plane of an edge of the spa. An accumulation member has a fixed portion mounted on the spa and a movable portion that transmits force to the carrier segment. A travelling wheel is mounted on each opposite side at a front end of the carried segment, the wheels having a circumference equal to a distance of the front end of the carried segment spaced from the edge of the spa in the open position of the cover.

Abstract: A spa and swim spa cover lifter having a footplate with an elongated undermount that becomes secured under a spa or swim spa for added lifter stability and strength during the raising and lowering of a spa cover. The upper structure of the cover lifter is quickly and easily separated from the footplate, allowing its prompt removal for spa maintenance without the burden/expense of emptying and refilling the spa. The upper structure comprises two vertically-extending supports each having at least one permanently attached L-shaped bracket providing lateral sway reduction for the supports under load. At least one fastener removably secures each vertically-extending support and its associated brackets to the wider/exposed end of the footplate. The bottom part of each fastener is preferably fixed to the footplate. A pre-assembled body comprising adjustable spa cover support arms and lifting-assist/lowering-assist member is fixed to the vertically-extending supports using two height adjustment knobs.

Abstract: A lift assembly includes a lever arm mounting portion connected to a spring mounting portion, a lever arm, a spa cover engaging portion, and a pneumatic spring. A pneumatic spring proximal end portion has a pivoting connection to the spring mounting portion. A pneumatic spring distal end portion has a pivoting connection to the lever arm. The pneumatic spring exerts an extensive force upon the lever arm both when the lever arm is in the cover closed position and when the lever arm is in the cover open position. The extensive force urges the lever arm towards the cover open position when the lever arm is in the cover closed position, and the extensive force urging the lever arm towards the cover closed position when the lever arm is in the cover open position.

Abstract: A retractable canopy for use with a portable spa hot tub is provided. The retractable canopy includes a U-shaped bow having a pair of end members pivotably mounted to the spa hot tub, each end member of the U-shaped bow having a gear mechanism, a pair of spring-loaded levers coupled to the spa hot tub, each spring-loaded lever having a protrusion that communicates with the gear mechanism of one of the end members of the U-shaped bow, and a fabric member coupled to the U-shaped bow and spa hot tub. The U-shaped bow pivotably adjusts to one of a plurality of locking positions to expand or collapse the fabric member and may include lighting along the bow perimeter.

Abstract: A spa cover constructed of layers of pliable insulation encapsulated within a weatherproof vinyl reinforced fabric or a rubber membrane which is attached to rigid square support tubes that run parallel to the short end of the spa. The encapsulated insulation is fastened to the bottom of the square support tubes with corrosion-free nylon anchors which allows the soft insulation assembly to span over the water and rest directly on the spa bartop surface sealing the heat in and keeping debris out. An arched fiberglass rod structure supports a weatherproof rainfly which is permanently affixed to the flat cover assembly to shed rain and debris. The entire assembly is held in place at each end with adjustable straps which stretch the cover from end to end keeping the rainfly taut. Removing the cover to access the spa involves undoing the straps on one end and rolling the cover assembly towards the other end until the desired amount of spa exposure is reached.

Abstract: Coping arrangements and methods for mounting coping arrangements for swimming pools and related structures are provided. The coping arrangements include an elongated base member shaped and adapted to be received by a wall of a swimming pool; and a plurality of elongated top members, each of the plurality of elongated top members are adapted to be replaceably mounted to the elongated base member, and each of the plurality of elongated top members having an exposed contour different from each of the other elongated top members. The different exposed contours of the top members of the coping arrangement may comprise different cross-sectional. Methods for changing a coping arrangement, coping arrangement kits, coping members, and methods for installing a pool are also disclosed.

Abstract: Disclosed is a floating support structure for supporting a cover of a body of water. In an aspect, the floating support structure includes at least three legs, each leg of the at least three legs having a first terminal end and a second terminal end opposite the first terminal end, a hub coupled to the first terminal end of each leg of the at least three legs, and at least three floatation devices, wherein each floatation device of the at least three floatation devices is coupled to the second terminal end of a leg of the at least three legs. In an aspect, the hub may be configured to receive a terminal end of at least one interconnection rod, and the at least one interconnection rod may be configured to couple the floating support structure to a second floating support structure.

Abstract: A quick and easy bench and a hot tub cover platform. The bench top has three support braces: one left side, one center, and one right side. The bench top is hinged to a 2×4 on a wall. There is another 2×4 lower on the wall for the left, center, and right side braces to support the bench top. There are saddles on the bottom of the bench and a lower 2×4 on wall for the braces to support the bench. The top of the hot tub platform consists of 5-2×4's screwed to 4 stringers running perpendicular to the 5-2×4's and supported on the backside by 4 vertical 2×4's with a cross brace 2×4 at the bottom and top. The platform is attached to the hot tub skirt by a 2×4 screwed on the tub skirt.

Abstract: A spa cover comprising: a) a bladder section having a length and a width approximating that of a water spa; b) a plurality of elongated and generally parallel structures affixed to and substantially spanning the width of the bladder section; c) a plurality of flexible rods affixed to the bladder section and under sufficient tension to compress and create an arc over the width of the bladder section; and d) a cover supported by the flexible rods; wherein the rods and the elongated structures are spaced sufficiently to allow the bladder section and the cover to be rolled lengthwise.

Abstract: A pool cover includes a flexible, water impervious sheet of material having a centrally located float disposed on an upper surface of the material. In an embodiment the float member comprises a closed cell polymeric foam member. In an embodiment the polymeric foam float member is disposed within a pocket formed by a cover sheet attached to the water impervious sheet of the pool cover.

Abstract: A movement assistance device for a spa cover is described and which includes a moveable spa cover portion, and a pair of pneumatic cylinders which cooperate with a housing mounted on one of the spa cover portions, and which further assists in the movement of one of the spa cover portions relative to the other spa cover portion, and a third pneumatic cylinder is provided and which allows movement of each of the respective spa cover portions to a non-occluding position relative to the spa so as to allow use of the spa.

Abstract: A spa and swim spa cover lifter having a footplate with an elongated undermount that becomes secured under a spa or swim spa for added lifter stability and strength during the raising and lowering of a spa cover. The upper structure of the cover lifter is quickly and easily separated from the footplate, allowing its prompt removal for spa maintenance without the burden/expense of emptying and refilling the spa. The upper structure comprises two vertically-extending supports each having two permanently attached L-shaped brackets providing lateral sway reduction for the vertically-extending supports under load. Three fasteners removably secure each vertically-extending support and its two associated brackets to the wider/exposed end of the footplate. The bottom part of each fastener is permanently fixed to the footplate, preferably by welding.

Abstract: A pool cover system comprises a retractable pool cover, a track, a line, a line attachment block, and a cover attachment block. The line may be fixedly attached to the line attachment block. The line attachment block may be at least partially captured within the track. The cover attachment block may be at least partially captured within the track. The cover attachment block may be fixedly attached to a first lateral edge of the pool cover. The longitudinal edge of the cover attachment block may include a saddle configured to trap the line attachment block. The line attachment the line attachment block is free of attachment to the cover attachment block.

Abstract: A spa cover lifting device that easily lifts and stows the removed cover out of sight below the upper edge of the spa is disclosed. When closing, the lifter assists the cover up out of its hidden stowage, and guides the cover back into position on the spa. One difference in this design from current art is that the spa cover when stowed disappears out of sight to those in the spa, below the top edge of the spa. Current spa cover lifters generally all park at least part of the stowed cover above the top edge of the spa, blocking views and reducing apparent roominess. Fourteen exemplary methods are shown to accomplish such a spa cover lifter, accommodating different size spas and cover designs, but it could also be done in other ways.

Abstract: A device for covering a pool, for example a swimming pool, has an upper component composed of a closed cell polymeric foam and a lower component composed of an open cell polymeric foam. The device can have, or can acquire in use, a convex upper surface which reduces the danger that it will be blown off the pool by wind.

Abstract: A cover assembly for a spa having a base and a shell supported by the base is provided. The cover assembly includes a cover member selectively movable between a covered position and an uncovered position, and a lifting assembly having a first lifting mechanism rotatably coupled to the cover member and to the base. The first lifting mechanism provides two axes of rotation for the cover member relative to the base.

Abstract: A lightweight insulating spa cover for a heated spa with an open top, the spa cover constructed with a substantially rigid perimeter frame with a plurality of cross supports in the form of tension bands that encompass the frame in a crisscross pattern to form a support for an outer casing that encases the frame with the outer casing being fabricated of a breathable weatherproof fabric that is stretched over a layer of reflective bubble wrap material that provides a cushion and added insulation for the hollow lightweight cover.

Abstract: A pool cover having a main cover sized and shaped larger than the swimming pool size. The main cover includes an outer edge having a pocket. The pocket includes an interior, ends with openings to access the interior, a plurality of slits in communication with the interior, a plurality of drain openings, and strap members for securing the pool cover to a surface. The interior of said pocket is sized for receiving a weight. The pool cover can include an air pillow for placement between the surface of the water in the pool and the main cover. The pocket allows for a uniform weight to be placed around the outer edge of the main cover in order to pull the main cover tight enough over the air pillow resulting in a dome like effect over the swimming pool.

Abstract: A spa according to the present invention includes a shell and a support structure including a base member, a plurality of side members and a plurality of end members to support the shell without the need for a sub-frame. The spa also includes a cover and a plurality of lifting members for supporting the cover. The lifting members are actuatable between a lowered position in which the cover is positioned generally atop the shell and an elevated position in which the cover is spaced from the shell and the support structure. The lifting members are secured to at least one of the side members and the end members.

Abstract: A computerized electrical powered apparatus where one part is different types of housings with or without a cover. The apparatus produces magnetic field, for inducing water, in the housing (if a shower: inducing water, and water-vapor (mist) via a plumbing assembly). The housing uses: CO2 liquid cooling to cool electrical circuit boards, electromagnet(s), nanotube(s), nanowire(s), that control: water, elements, nutrients, drugs, found in blood, living tissues, vegetation tissue(s) of any organism(s). In another aspect; an extractor capturing molecule(s) in steam derived from compounds, drugs, that converge with a superconductive wire transporting ionic compounds, molecular ions; rise out from hot water, H2O-steam, and dry gases feed extractor, into a cooled catalyst pipe linking to a housing. The pipe with the wire inside, attach inside the housing, where the mixture disperses. A digital numerical image is captured on a computer monitor by rotating hydrogen molecules of water in the housing.

Abstract: Embodiments relate generally to plastic wall panels. Wall panels are formed by rotational molding processes and may be used in sound attenuation barriers or other wall or building structures. Some embodiments include reinforcing structure. The reinforcing structure may be configured to effectively support a plastic shell of the wall panel in a way that allows some relative movement between the plastic shell and the reinforcing structure.

Abstract: Provided is a pool spring cover having an elongate tubular member with openings on first and second sides, respectively. The first and second sides span a longitudinal axis. An attachment member extends generally along the longitudinal axis from a first portion of the second side to a free end. A fastener comprised of a first fastener element and a second fastener element is provided. The first fastener element is associated with the attachment member at the free end and the second fastener element is associated with the tubular member at a second portion of the second side. The first and second fastener elements are adapted to fasten to each other such that the attachment member forms a loop. The first fastener element and the second fastener element may form a one-time use fastener. Also provided are related systems and methods.

Abstract: A pool cover for above ground swimming pools includes a cover with an elevated central area, a plurality of rods to support the cover, and a plurality of clip assemblies to couple the rods to the swimming pool. The cover is a waterproof textile having a plurality of sleeve members allowing for insertion of the support rods to secure and support the cover. Each clip assembly includes hook which removably attaches to an upper perimeter edge of the pool and a pocket to receive an end of the support rod. When assembled, the support rods form a dome-like structure circularly arranged about the edge of the pool.

Abstract: A pool cover system that may include a pool cover; a debris collection unit that is coupled to a front end of the pool cover; and a debris manipulator that is coupled to the debris collection unit and is arranged to move the debris collection unit between a debris collection position and a debris dumping position.

Abstract: A cover assembly for covering a container of liquid includes: a drive shaft including a drive pin; an engagement device configured for moving axially on the drive shaft when the drive pin engages the engagement device, the engagement device including at least one first engagement mechanism; and a first engagement hub rotatably mounted to the drive shaft and configured for being driven by the engagement device, the first engagement hub including at least one second engagement mechanism which includes at least one magnet configured for pulling the at least one first engagement mechanism and thereby for facilitating an engagement of the at least one first engagement mechanism with said at least one second engagement mechanism.