Abstract: A hem bar assembly that secures to a shade material of a roller shade comprising first and second hem bar portions each including an inner face having a first channel, a second channel, and third channel located between the first and second channels. The hem bar assembly further comprises at least one tubular spline that wedges and retains the shade material within one of the first channel and the second channel of one of the first and second hem bar portions. The hem bar assembly further comprises a longitudinal retaining clip having at least a pair of oppositely disposed hooked arms outwardly extending therefrom, wherein each hooked arm is adapted to enter and clip to one of the third channels in a respective first and second hem bar portions to attach the first hem bar portion to the second hem bar portion.

Abstract: The present gated barrier includes a visual indicator to show the end user one or more features of the gate barrier such as how to set up the gated barrier, whether the frame of the barrier is true and square, or whether the barrier frame has been set up with sufficient pressure between, for example, two door jambs.

Abstract: A desktop shield system for splashes protection that has a right rod, a left rod and a panel shield. The lower end of the right rod is connected to a base that its first side has a protrusion that corresponds with a recess at its second side. The right rod also includes magnet elements that are connected to its right side at a zero height. The left rod is designed in the same way as the right one but in reverse as a mirror view. The system can be connected with a another identical system, in a way that the recess of the left rod of the another system is assembled with the protrusion of the right rod of the system and the magnet elements of the left rod of the another system magnetically connected with the magnet elements of the right rod of the system.

Abstract: A safety gate has a first post assembly, a spinning mechanism, a cover body, and a positioning mechanism. The spinning mechanism is rotatably mounted in the first post assembly. The cover body has an edge mounted in the spinning mechanism. The gate body is wound around and is pulled out from the spinning mechanism to spin the spinning mechanism. The positioning mechanism has a knob and a positioning mount. The positioning mount is moved upwardly or downwardly relative to the spinning mechanism to selectively disengage from and engage with the spinning mechanism. The spinning mechanism is prevented from spinning while being engaged with the positioning mount.

Abstract: A cargo screen assembly for a vehicle includes: a screen unit disposed inside a trim of a vehicle in a wound state, and for covering a cargo loading space of the vehicle when being drawn toward a vehicle interior; a driving part for drawing out the screen unit from the trim and the front end of the screen unit from the trim; and a pulling-out part for supporting the screen unit drawn out from the trim.

Abstract: A curtain may include a blind shade stretched or contracted in a first direction to adjust transmittance of light, a base coupled to one end portion of the blind shade in the first direction thereof, and a transmittance adjusting device to adjust the transmittance of the light passing through the blind shade by pulling outward or releasing inward an other end portion of the blind shade in the first direction thereof, in the state that spacing from the base in the first direction is fixed.

Abstract: A cargo space cover for vehicles including a roller blind which is fixated with a first edge at a winding shaft and which includes a tension rod at a second edge that is remote from the winding shaft; a winding shaft drive which acts against a pull out movement of the roller blind and which moves the roller blind from a pulled out position into a pulled in position; and a support device which cooperates with the tension rod and by which the roller blind is movable into an intermediary position that releases a vehicle cargo space at least partially, wherein a positioning drive is provided in addition to the winding shaft drive, wherein the positioning drive moves the tension rod which moves the roller blind into at least one intermediary position.

Abstract: A door assembly having a flexible door panel wound and unwound on a drum or the like to selectively block or permit access through an opening, the flexible door panel having a stiffness, a width, and a length. The door assembly further includes vertically extending side columns disposed on opposite sides of the opening, the side columns being configured to engage a marginal edge of the flexible panel to vertically guide the panel while opening or closing. Attached to a leading edge of the door panel is a bottom bar having a greater stiffness than the door panel and a narrower width than a distance between the vertical panel guide assemblies. Bottom bar guides are disposed proximate a lower portion of the opening and are configured to engage a portion of the bottom bar only when the bottom bar is located in at least a partially closed position.

Abstract: A window protection apparatus on a working machine features a reel rotatably supported at an exterior of the operator cabin in a position proximate a top end of the window for rotation about a horizontal axis and a flexible window covering wound on the reel such that rotation of the reel in a first direction deploys a free end of the window covering from the reel, and rotation of the reel in an opposite second direction retracts the free end of the window covering back toward said reel. A retaining member is mounted at the exterior of the operator cabin in a position proximate a bottom end of the window, and a retaining element is attached to the window covering proximate the free end thereof for engagement with the retaining member to secure the window covering in a closed position spanning downwardly from the reel over the window.

Abstract: In one embodiment, a variable screen includes a generally flat sheet having a front surface, a back surface, and a plurality of elongated slits that extend through the sheet from the front surface to the back surface, wherein the sheet includes a shape memory material that enables the slits to open into openings through which light and fluid can pass when a tensile force is applied to the sheet in a direction generally perpendicular to the slits and further enables the slits and openings to automatically when the tensile force is removed.

Abstract: Systems and methods to retain and refeed door curtains are disclosed. An example door is disclosed that includes first and second tracks. The example door includes a retainer borne by the first track and an alignment guide associated with the first track. The example door also includes a curtain extending laterally between the first and second tracks. The curtain has a leading edge selectively movable between a closed position and an open position. The example door includes a primary projection borne by the curtain that is in guiding engagement with the retainer within the first track. The primary projection is dislodged from the track when the curtain is in the breakaway state. The example door includes a secondary projection borne by the curtain and arranged to travel outside of the alignment guide when the leading edge is traveling between the open position and the closed position.

Abstract: A self-engaging emergency egress lock assembly mounted to a door track is described. As a door lock strike element contacts a lock strike assembly contained within the door lock assembly, the strike assembly hinges over the door lock strike element. When the door reaches a predetermined down limit power is applied to activate an actuator. Upon activation, the actuator engages a lock strike stop which prevent the strike assembly from disengaging the door lock strike element. If the door is attempted to be opened while the lock strike stop is engaged, the lock strike assembly pushes against the stop, preventing the door from traveling upward. In an emergency egress (alarm) condition, power to the actuator is terminated, thereby releasing the lock strike stop and by extension, the strike assembly, thus disengaging the door lock strike element, thereby providing emergency egress capability.

Abstract: A covering for an architectural opening including a roller, an end rail, and a panel rotatable onto the roller and spanning between the roller and the end rail. The panel includes a front sheet, a rear sheet, and a cell spanning between the front and rear sheet. When the front sheet is at a first position relative to the rear sheet, the cell is open. When the front sheet is at a second position relative to the rear sheet, the cell is closed.

Abstract: A door assembly having a flexible door panel wound and unwound on a drum or the like to selectively block or permit access through an opening, the flexible door panel having a stiffness, a width, and a length. The door assembly further includes vertically extending side columns disposed on opposite sides of the opening, the side columns being configured to engage a marginal edge of the flexible panel to vertically guide the panel while opening or closing. Attached to a leading edge of the door panel is a bottom bar having a greater stiffness than the door panel and a narrower width than a distance between the vertical panel guide assemblies. Bottom bar guides are disposed proximate a lower portion of the opening and are configured to engage a portion of the bottom bar only when the bottom bar is located in at least a partially closed position.

Abstract: A window protection apparatus on a working machine features a reel rotatably supported at an exterior of the operator cabin in a position proximate a top end of the window for rotation about a horizontal axis and a flexible window covering wound on the reel such that rotation of the reel in a first direction deploys a free end of the window covering from the reel, and rotation of the reel in an opposite second direction retracts the free end of the window covering back toward said reel. A retaining member is mounted at the exterior of the operator cabin in a position proximate a bottom end of the window, and a retaining element is attached to the window covering proximate the free end thereof for engagement with the retaining member to secure the window covering in a closed position spanning downwardly from the reel over the window.

Abstract: A reinforcing structure for a slide shutter deters unauthorized entry of an intruder into a building and allows easy opening and closing of the shutter. The reinforcing structure (1) for a slide shutter has a vertically movable shutter curtain (3) formed by interconnecting slats (3a), a left and right pair of guide rails (4a, 4b) for guiding the shutter curtain (3), and a shutter case (5) into which the shutter curtain (3) is wound and contained. The reinforcing structure (1) is also provided with a shutter reinforcing base member (6) having one end rotatably mounted to the upper end of one guide rail (4a) and the other end open, a length adjusting member (7) inserted in the shutter reinforcing base member (6), and a connecting member (8a) rotatably connected to the front end of the length adjusting member (7), vertically sliding while being guided by the other guide rail (4b), and capable of being removably mounted to the shutter curtain (3).

Abstract: A pair of parallel pins abutting against the inner peripheral surface of a hollow shaft are provided to a first arm part of a shank at a predetermined spacing in the longitudinal direction. This prevents the shank from tilting or rattling. Further, an insertion hole of the retaining cap and the cross section of the first arm part each have an elliptical shape, and thus the rotation of the shank with respect to the hollow shaft is restricted and the position of the shank is kept such that the interlocking part points upward.

Abstract: A pair of parallel pins abutting against the inner peripheral surface of a hollow shaft are provided to a first arm part of a shank at a predetermined spacing in the longitudinal direction. This prevents the shank from tilting or rattling. Further, a coil spring restricts the rotation of the shank around the first arm part and keeps the position of the shank such that an interlocking part points upward.

Abstract: There is disclosed a bottom bar for attachment to a lower edge of a window blind. The bottom bar includes an elongated tube having a bottom and a pair of opposing side walls separated by a space and an elongated slit extending along the tube, the slit communicating with the space. The slit is dimensioned to permit the lower edge of the window blind to pass through. The bottom bar further includes an elongated lock member dimensioned to fit within the space, the elongated lock member dimensioned to be too small to pass through the slit. The lock member has a flat side wall for attachment to the lower edge of the window blind by an adhesive. The opposing side walls of the elongated tube are tapered toward each other from the bottom towards the slit such that the opposing side walls abut the flat side wall of the lock member when the lock member moves towards the slit.

Abstract: A roll-up blind with a better safety feature includes a pore and a shed cloth. The pore is fixed at an end of the shed cloth which is provided on the pore. The shed cloth is provided with a first end surface and a second end surface, the first end surface is opposite to the second end surface and is provided with at least one male fastening tape; whereas, the second end surface is provided with at least one female fastening tape. Accordingly, through the shed cloth that is provided on the pore, the male fastening tapes on the first end surface can be fastened together with the female fastening tapes on the second end surface, such that the shed cloth can be rolled up.

Abstract: A sun shade apparatus of the present invention has a curtain capable of shielding a window portion of a door. The curtain can be stretched between a shielding state and an open state on the window portion. The apparatus has a motor, a cable provided so as to be capable of being forced out or drawn in by the operation of the motor, and a connector connecting the cable and the curtain to each other. The curtain is stretched with the operation for forcing out or drawing in the cable. The connector has a connection release mechanism that releases the cable and the curtain from the state of being connected when a load equal to or higher than a predetermined value is applied against the operation for forcing out or drawing in the cable.

Abstract: A window covering is disclosed that has a safety device that includes a first cord segment having stops spaced along the first cord segment, and a second cord segment having stops spaced along the second cord segment. The first cord segment and the second cord segment extend from respective end caps. The end caps are configured to connect to the ends of a bottom rail. A first anchor is connected to the first cord segment, and a second anchor is connected to the second cord segment. At least one of the first end cap and the first anchor is configured to releasably connect to the first cord segment at a selected stop on the first cord segment and at least one of the second anchor and the second end cap is configured to releasably connect to the second cord segment at a selected stop on the second cord segment.

Abstract: A darkening device (1) which has a shade fabric (10) which is mounted to be able to move for displacement between a receiving position in which it is taken up spaced apart from the region to be darkened, and a drawn position in which it extends underneath the region to be darkened, and supporting arrangement (30) which are able to support the shade fabric (10) in the transverse direction in the region to be darkened. The supporting arrangement (30) holds the side edges (11, 12) of the shade fabric (10), on the one hand, and on the other, tension the shade fabric (10) between the side edges (11, 12) in the transverse direction.

Abstract: A cubicle privacy screen system includes a roller and a screen having a distal end. The screen is wound on the roller and movable between an extended position and a retracted position. A first attachment device is included for securing the roller to a first cubicle wall, and a second attachment device is included for releasably securing the distal end of the screen to a second cubicle wall.

Abstract: A window shade arrangement having a manually operated window shade web whose movement between open and closed positions is guided by guide rails at each side. A pull rode having oblong sliding blocks travels in the two guide rails. The sliding blocks, together with the pull rod, can swivel about an axis parallel to the pull rod. In this way, the sliding blocks can become secured in corresponding locking pockets in the guide rails. The locking can be released by manual turning of the pull rod in the opposite direction.

Abstract: A roller shutter for protecting doors and windows during high wind conditions wherein a fenestration frame 18 is secured to the header 10 and sill 12 of the building. A spindle 38 is rotatably mounted in a box 28 and one edge of a fabric sheet 40 is attached to the spindle. When the spindle is rotated, the fabric sheet is coiled or uncoiled around the spindle so that the fabric sheet 40 is extended or retracted across the fenestration member.

Abstract: A mechanism for guiding roll up doors made from a foldable sheet. A longitudinally extending wall of the foldable sheet is secured to a fixed structure and two longitudinally extending lateral walls extend perpendicularly to form another two reversible folds resulting in two longitudinally extending inner walls at a spaced apart and parallel relationship with the two lateral walls. From one of these inner walls, a longitudinal wind bar extends at a predetermined cooperative angle. Upon the application of a wind load to the door slats, the load is transmitted to the foldable sheet guiding assembly from the slats directly and through the wind lock assembly through at least four contact points. The laterally articulated door slats include longitudinal hook portions or wind lock assemblies that slidably coact with the wind bar to keep the slat in place.

Abstract: A roll-up barrier has a base, an end cap, a drive shaft connected between the base and the end cap, a rolling assembly, a resilient element and a flexible barrier. The end cap has an arresting mechanism having a control button and an arrestor. The rolling assembly is mounted rotatably around the drive shaft and has a rolling bushing. The rolling bushing has an actuator and multiple one-way arresting teeth. The resilient element provides a reposition force for rolling back the rolling assembly. The flexible barrier is mounted retractably around the rolling assembly. When the control button is pressed and rotated, the actuator detaches the arrestor from the arresting teeth to allow rotation of the rolling assembly. When the control button is released, the arrestor engages the arresting teeth to prevent the rolling assembly from rotation so the flexible barrier can be pulled out and held at a desired length.

Abstract: The present invention provides a simple-structured windable screen device provided with a locking element that can be unlocked both from the inside and the outside of a building.

Abstract: A magnet holder constructed of a resilient material as a plural-sided box has an open side. A bar magnet within the magnet holder extends outwardly from the open side. A second side of the box has an arcuate convex shape extending outwardly. A hollow door frame strut provides a first interior surface abutting a third side of the box. The magnet abuts a second interior surface of the strut with the second side of the box abutting a third interior surface such that the arcuate shape is flattened, springfully wedging the box between the first and second interior surfaces of the strut and securing the magnet holder in place within the strut.

Abstract: A frame assembly for at least partially enclosing a raised floor structure includes a bottom frame member positioned adjacent an associated raised floor structure. A pair of spaced apart side frame members are connected to and extend upwardly from the bottom frame member. A top frame member is spaced from the bottom frame member and connected to the pair of side frame members. At least one picket extends between and is connected to the top and bottom frame members. The at least one picket is oriented approximately parallel to the side frame members. A screen is selectively mounted to at least one of the top and bottom frame members and the side frame members. The screen is located adjacent the at least one picket.

Abstract: A door-latching system for a sectional door with multiple door panels helps hold the door at its fully open position in case the door's counterweight torsion spring fails to do so. The door-latching system includes a latch assembly that moves between a maintained release position and a door-blocking position. In the door-blocking position, the latch assembly helps hold the door open by providing an obstruction to the door panels. In the maintained release position, the latch assembly allows the door to move freely between open and closed positions without the door-latching system clacking as the door panels or their guide rollers travel past the latch assembly. Movement of the door panels automatically shifts the latch assembly from its release position to its door-blocking position, and manual actuation returns the latch assembly back to its release position. The latch assembly is especially suited for mounting to a track that guides the movement of the door panels.

Abstract: A system and method that improves the interconnection between a pool cover and a storage reel so that the pool cover can more readily be wound on the storage reel in an even manner. The system includes at least one rigid plate that is attached to an edge of the pool cover. The rigid plate can be either manufactured into the structure of the pool cover or retroactively added to the edge of the pool cover. A mechanical fastening system is provided that enables the rigid plates at the edge of the pool cover to be attached to the storage reel so that the edge of the pool cover is held parallel to the axis of rotation for the storage reel. In this manner, the edge of the pool cover is automatically aligned with the storage reel by attaching the rigid plate to the storage reel.

Abstract: An assembly for a shade system of a motor vehicle, such as a roll-up shade or a sliding sunroof, includes a guide rail and a slide movable in the guide rail. The slide includes a braking element engageable in a braking groove of the guide rail to stop the slide in a desired position in the guide rail. The slide has a swivel pin and a support element acted upon by a spring and set apart from the swivel pin. The support element is supported on the guide rail so that the braking element is forced into the braking groove to stop the slide in the guide rail.

Abstract: A cargo area divider, has a flexible planar structure that can be pulled out and is held at a rear end on a roller-shade shaft and at a front end is equipped with a pull-out bar that extends over the entire width of the planar structure. The pull-out bar is conformingly into a hollow chamber region of a cover profile extending at least over the width of the planar structure.

Abstract: A fly screen apparatus having a screen with a handle at an end thereof. The handle has opposite ends received respectively within a pair of runners. The runner has a guide and positioning track formed on an inside surface of the runner. An intermediate rest element is formed in an intermediate position on the side of the runner. The handle has a guide piece supporting a tip which is longitudinally mobile. The tip follows the guide and positioning track so as to be located in various positions within the runners.

Abstract: A mechanism for quick hooking and unhooking of a handle, used particularly for fly screens and fly screen assemblies with a chain-operated movement. The invention includes a casing containing a rewind roll, a screen fastened to the rewind roll and a handle, and runners. The handle was a tubular profile with a hooking mechanism on one end. The hooking mechanism of the handle operates in conjunction with a reciprocal holder attached to a lower end of a runner.

Abstract: Assembly for unwinding a protective screen, with a quick-release mechanism for hooking and unhooking the handle used particularly for fly screens, and which includes: at least one holding means at the lower end of one of the runners, with the upper part which is open and which contains a guide path with an inlet, an outlet and an intermediate rest position; at least one hooking means located at the end of the handle, and which includes a guide piece which longitudinally guides a mobile tip. The said tip has a protruding pin on at least one side that fits into the guide-track in holding means; and in which, at the beginning of the said guide path, formed in the inlet of the holding means in correspondence with the lower part of at least one of the runners, there is a deviation towards the lower part which co-operates with a stop point.

Abstract: A mechanism for quick hooking and unhooking of a handle, used particularly for fly screens and fly screen assemblies with a chain-operated movement. The invention includes a casing containing a rewind roll, a screen fastened to the rewind roll and a handle, and runners. The handle was a tubular profile with a hooking mechanism on one end. The hooking mechanism of the handle operates in conjunction with a reciprocal holder attached to a lower end of a runner.—.

Abstract: A power-driven shutter door includes a curtain supported in a pair of tracks for bi-directional sliding movement open and closed positions, and a power drive assembly for driving movement of the curtain. The power drive assembly includes a pair of sprockets that engage shoes of the curtain, a motor for driving bi-directional rotation of the sprockets, and a control circuit including a switch movable between “open” and “close” positions for supplying power to the motor to move the shutter curtain between positions. A power-driven lock is also provided, and includes a rod supported on the curtain for movement between extended and retracted positions, a manually-operated actuator for shifting the rod between the extended and retracted positions, and a power-driven lock supported on one of the tracks and presenting a locking arm shiftable between an extended position in which the arm protrudes into the track and a relatively retracted position.

Abstract: A trackless roll-up door covering to contain materials within, and prevent animals from entering, a building or enclosure having a large door opening. In one embodiment of the invention an open weave vinyl coated polyester moisture resistant quick drying fabric material is fixedly weighted at a first end and fixedly attached to a tubular assembly at a second end. The tubular assembly is rotated by rotatable drive means, such as a motor, hand crank, spring loaded mechanism, which extends the fabric when operated in a first direction and retracts the fabric when operated in a second direction. Strapping means are used to secure the fabric material when it is extended to loosely close cover the door opening. Additional strapping means are optionally used to further secure the fabric material and prevent bowing in the center of the extended material.

Abstract: A retractable cargo cover arrangement (10) for the interior of the cargo hold (200) of a freight carrier wherein the cover arrangement (10) includes a generally elongated rectangular cover member (20) fabricated from a sheet of waterproof material (21) and having an upper end affixed to, and wrapped around, a spring loaded retraction cylinder (22) and a lower end affixed to an elongated dowel (24) in a window shade fashion; wherein, the arrangement further includes a first pair of brackets (30), (40) for suspending the upper portion of the cover member (20) in the upper portion of the cargo hold (200) and a second pair of brackets (60) (70) for releasably engaging the lower portion of the cover member (20) in the lower portion of the cargo hold (200) to prevent water damage to the cargo (100) contained within the cargo hold (200).

Abstract: A trackless roll-up door covering to contain materials within, and prevent animals from entering, a building or enclosure having a large door opening. In one embodiment of the invention an open weave vinyl coated polyester moisture resistant quick drying fabric material is fixedly weighted at a first end and fixedly attached to a tubular assembly at a second end. The tubular assembly is rotated by rotatable drive member, such as a motor, hand crank, spring loaded mechanism, which extends the fabric when operated in a first direction and retracts the fabric when operated in a second direction. Strapping members are used to secure the fabric material when it is extended to loosely close cover the door opening. Additional strapping members are optionally used to further secure the fabric material and prevent bowing in the center of the extended material.

Abstract: A stowable partition assembly for a truck cab provides privacy for an interior sleeping area mounted aft of the operator space. The assembly has an overhead track depending from the cab ceiling, oriented to define a border between the forward operator area and the aft interior sleeping area. A pair of curtains are hung from their upper edges from the overhead track and are positionable on the track to divide the aft living space from the forward operator space when extended. A pair of stowage compartments are located at each end of the track along the interior sides of the truck cab to receive the curtain when retracted. Retraction of the curtains is provided by roll up retractors disposed in each stowage compartment. The curtains are each attached along one of two vertical edges to the roll up retractor to be wound thereon. An interlocking latch provides closure of the curtains when pulled from the stowage compartments.

Abstract: A protective cover assembly used to cover and protect windows, doors or other wall openings for homes, office buildings, hotels, and other walled structures from the destructive forces of a high windstorm, such as a hurricane. The current form of the preferred embodiment consists of a high strength fabric covering an opening, such as a window and being supported by brackets, a rod and a bar. Once installed, the high strength fabric is stretched over the opening, through the use of a gears and ratchet assembly. The high strength fabric once stretched will provide protection from high winds and wind borne debris common in storms such as hurricanes. The protective cover assembly also prevents unlawful entries or break-ins of buildings. The high strength fabric is securely supported to the rod and steel bar that are firmly attached to the wall structure near the wall opening.

Abstract: A rain canopy apparatus for a stroller provides a canopy for shielding the stroller from storms and snows. The canopy utilizes an edge spool to roll itself up and to be stored inside an accommodation pipe formed by pivotally connecting upper and lower half pipes. The accommodation pipe has slidable end caps at both ends. Each end cap provides a protruding threaded bar to engage with a clamp for being fixed to a respective side bar of the stroller. When the accommodation pipe is opened with the upper half pipe pivoted away from the lower half pipe, the canopy has one edge hung at the interior hooks of the accommodation pipe and another edge pulled to cover the whole stroller. The canopy apparatus for a stroller can have advantages in storability, portability and operation.

Abstract: A roller screen includes a gauze screen, a roll-up mechanism for the gauze screen, a pull beam connected to the free end of the gauze screen, guides for guiding the pull beam and the side edges of the gauze screen. Furthermore spring hooks are used which cooperate with cams present on the ends of the pull beam. The spring hooks are mounted in the ends of the guides remote from the roll-up mechanism on a base which fits in the end of a guide. The spring hooks extend substantially in a longitudinal direction of the guides. The spring force of the hooks can be adjusted by an adjusting screw mounted in the base. The adjusting screw extends substantially perpendicularly to the hook and is accessible via an opening formed in a side wall of the guide.

Abstract: A system for removably attaching a tonneau cover over the bed of a pickup truck or similar vehicle. The system includes front, rear, and side rails. The front and two side rails are respectively secured in fixed positions atop the front and side walls of the bed. The rear rail is then suspended to extend between the two side rails across the mouth of the tailgate opening. The ends of the rear rail are inserted into longitudinally extending channels in the side rails and can be slid relative to the fixed, front and side rails. The system also can include one or more support bows that can be inserted into the channels in the fixed, side rails and slid relative to them to spaced positions intermediate the front and rear rails. With the slidable, rear rail, the cover can be selectively tensioned or loosen to ease putting the cover over the bed and taking it off. The tailgate and rear rail sealingly engage each other when the tailgate is closed to make the system substantially watertight.

Abstract: A barrier extendable and retractable beneficially in response to a changing environment of use, is disclosed. In use, the barrier is attached at its ends to support surfaces. An extension and retraction mechanism for the barrier beneficially exerts substantially constant force regardless of the barrier extent. In a preferred embodiment, a ball screw, an axially movable ball screw nut, and gas springs are used.

Abstract: A rolling window screen assembly for use with a window assembly. The screen assembly is deployable in at least three positions. The first engagement position exists wherein the flexible screen may be extended over the entire window. The second engagement position exists wherein the flexible screen is releasably engaged to a sash to enable the flexible screen o be deployed dynamically according to the position of the sash. Finally, the flexible screen may be disengaged from the window assembly and retracted to expose substantially all of the window opening. A pull-cord apparatus having a pull-down non-elastic cord interfacing with an elastic take-up cord may be utilized for manipulating the flexible screen.