Abstract: Pliable-wall air ducts with internal expanding structures are disclosed. An example air duct system includes a shaft to be disposed within an air duct, to extend in a longitudinal direction, and to be in longitudinal compression. The air duct system also includes a plurality of ribs to be coupled to the shaft and to engage an inner surface of the air duct and a spring to be disposed within the air duct, the spring to be coupled to the shaft. The spring under stress being a contributing factor in both the shaft being in longitudinal compression and the air duct being in longitudinal tension.

Abstract: Pliable-wall air ducts with internal expanding structures are disclosed. An example air duct system includes a shaft to be disposed within an air duct, to extend in a longitudinal direction, and to be in longitudinal compression. The air duct system also includes a plurality of ribs to be coupled to the shaft and to engage an inner surface of the air duct and a spring to be disposed within the air duct, the spring to be coupled to the shaft. The spring under stress being a contributing factor in both the shaft being in longitudinal compression and the air duct being in longitudinal tension.

Abstract: Example air ducts comprising pliable tubular sidewalls are provided with example internal frameworks that hold the duct in a generally expanded shape even when the duct is depressurized. The framework tensions the pliable sidewall material along the length of the ducts to keep the material taut. In some examples, the framework is restrained within the duct such that the duct's sidewall, being in tension, holds the framework in compression longitudinally. Thus, in the longitudinal direction, the duct is in tension and the framework is in compression. To prevent the framework from buckling under the compressive force, some example frameworks comprise a central longitudinal shaft with a plurality of radial spokes and rings that help hold the shaft straight. In some examples, the rings also help hold the duct radially expanded.

Abstract: Systems and methods to detect and warn proximate entities of interest are described herein. An example hazard warning system for a forktruck includes a controllable light source to project light onto a floor adjacent the forktruck. A hazard discriminator determines when the forktruck poses a hazard to an entity of interest in a vicinity of the forktruck, and responsively generates a hazard output. A controller receives the hazard output and controls the light source such that the light source is in a first state when the hazard output is not received and a second state when the hazard output is received, where the first state is different than the second state.

Abstract: Example lateral sealing members for use with weather barriers are disclosed. An example lateral sealing member includes a lateral sealing member being vertically elongate. The lateral sealing member has a J-shaped cross-section extending between an attached end and a tip of the lateral sealing member. The lateral sealing member has a groove along the tip. The lateral sealing member is movable between an activated configuration and a relaxed configuration. The tip to extend farther into a vehicle pathway when the lateral sealing member is in the relaxed configuration than when the lateral sealing member is in the activated configuration. A tip seal is provided along the tip of the lateral sealing member. The tip seal is to protrude in the groove.

Abstract: Vehicle restraints with underside catches are disclosed. An example vehicle restraint includes a main body and a barrier. The barrier includes a proximal end, and a distal end. The distal end is selectively movable to a first blocking position, a plurality of extended blocking positions, and a stored position. The example vehicle restraint also includes an engageable feature. The example vehicle restraint further includes a stop. The stop is to engage the engageable feature when the distal end is at the first blocking position while the stop is at a holding position. The stop is spaced apart from the engageable feature when the distal end is at the first blocking position while the stop is at a release position. The stop is spaced apart from the engageable feature when the distal end is in the stored position.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed herein. An example method disclosed herein includes determining a state of a device of a loading dock and, based on the state, generating via a display a first directional indicator having a first orientation and a first color. The first orientation and the first color are to cooperate to indicate first directional information.

Abstract: Example inflatable air barriers are disclosed herein. Some example barriers disclosed herein include one or more inflatable tubes for maintaining a sealed airlock leading to an underground shelter. Such shelters provide miners with temporary refuge in the event of a mining incident involving the release of contaminated air. Some example barriers disclosed herein include one or more of the following: an inflatable tube with an air permeable section, a resiliently compressible foam body or other resilient member for supporting a deflated tube, a magnet for providing a secure seal, an inflatable tube with interchangeable end caps, elastic bands for securing the position of an inflatable tube, or an inflatable tube with one or more windows.

Abstract: Example roll-up doors are disclosed. An example roll-up door includes a track system and a curtain. The curtain blocks a doorway when a leading edge is at a closed position and unblocks the doorway when the leading edge is at an open position. The roll-up door further includes a track roller to vertically travel along a track system. The track roller is to be rotatable relative to the track system. The roll-up door also includes a windbar to be coupled to the track roller. The windbar is closer to the lintel when the leading edge of the curtain is at the open position than when the leading edge is at the closed position. The windbar is to be vertically movable with the track roller and to be rotatable relative to the track roller and rotatable relative to the track system.

Abstract: Example room dividers are disclosed herein. An example room divider includes a first panel and a second panel. A first seal between the first panel and the second panel is to provide a first line of contact with at least one of the first panel or the second panel. A second seal between the first panel and the second panel is to provide a second line of contact with at least one of the first panel or the second panel. A touch-and-hold fastener connects the first panel and the second panel. The touch-and-hold fastener is positioned between the first line of contact and the second line of contact.

Abstract: Dock leveler safety supports are disclosed herein. An example dock leveler disclosed herein includes a deck movable relative to a platform between a raised position and a lowered cross-traffic position when the dock leveler is in a working configuration. The deck to be inhibited from descending toward the lowered cross-traffic position when the dock leveler is in a service configuration. A first deck obstruction is movable relative to the deck between a secured position and an unrestrained position. The first deck obstruction in the secured position configures the dock leveler in the service configuration. The first deck obstruction in the unrestrained position configures the dock leveler in the working configuration. The first deck obstruction in the secured position to block movement of the deck toward the lowered cross-traffic position and the first deck obstruction in the unrestrained position to permit movement of the deck toward the lowered cross-traffic position.

Abstract: Systems and methods to detect and warn proximate entities of interest are described herein. An example detection system includes a light source attachable to a forktruck, where the light source projects an illuminated warning field on a floor on which the forktruck is to traverse. The light source projects the illuminated warning field at a distance from a front end of the forktruck. The light source is separate from a headlight of the forktruck.

Abstract: Example weather barrier apparatus are disclosed herein. An example weather barrier apparatus disclosed herein include rear edge seals to sealingly engage a rearward facing edge of a vehicle parked at a loading dock. In some examples, the rear edge seal is part of a pivotal upper or side seal member that also includes a surface seal. The surface seal is spaced apart from the edge seal and is to sealingly engage a side or upper surface of the vehicle. In some examples, the vehicle's side surface is the outward facing surface of the vehicle's swung-open door. In some examples, the vehicle backing against the edge seal is what deploys the side seal. Some example weather barrier apparatus disclosed herein include an upper seal member and two side seal members, where vehicle-activated movement of the upper seal and side seal members are coordinated to seek and seal against rear corners of a cargo opening of the vehicle.

Abstract: Example weather barrier apparatus are disclosed herein. An example weather barrier apparatus includes a curtain having a plurality of compressible tubes positioned between a first end of the curtain and a second end of the curtain. The compressible tubes move between a collapsed position when the curtain is in a relaxed condition and an expanded position when the curtain is a taut condition.

Abstract: An external suspension system for supporting an inflatable air duct includes a series of external hangers that help hold the duct open while the duct is deflated. In some embodiments, the suspension system supports the duct at a series of points that are broadly distributed in a staggered pattern across the duct, yet the entire duct can be suspended from a single overhead cable, even if the duct is a stepped tube with multiple diameters. The system includes novel ways of locking the hangers to the duct and to the overhead cable.

Abstract: In some example pliable air duct systems, inflatable ducts of various diameters and lengths are created by selectively assembling pre-existing stock pieces in different combinations. In some examples, the stock pieces include disconnectable longitudinal joints and disconnectable circumferential joints, wherein the longitudinal joints enable interconnecting multiple stock pieces to achieve a desired tube diameter, and the circumferential joints allow connecting multiple tube segments end-to-end to produce an air duct assembly of a desired length. To control the volume and/or the direction of air discharged from the duct, the duct assembly, in some examples, includes an adjustable register comprising a movable pliable sheet that overlies a discharge opening in a pliable sidewall of the duct. In some examples, the inflatable duct includes one or more cutout patterns on the duct's sidewall to provide guidance in creating a sidewall discharge opening of a proper size and location.

Abstract: An example door includes a track and a curtain that includes a leading section. The curtain is to be in a breakaway state associated with a folded condition when the lateral section in an area proximate the leading section is dislodged from the track and folded over onto a main section to define an enfolded space. The curtain is to be in the breakaway state associated with an unfolded condition when the lateral section in the area proximate the leading section is dislodged from the track but not folded over onto the main section. The example door also includes an unfolder to extend into the enfolded space as the leading section moves toward an open position while the curtain is in the folded condition.

Abstract: Example vehicle restraint apparatus and methods of operating the same are disclosed herein. An example vehicle restraint includes a main body proximate a dock, a vehicle restraint drive unit, and a barrier coupled to the vehicle restraint drive unit and the main body. The barrier is movable relative to the main body between an extended position, a retracted position, and a plurality of intermediate positions between the extended position and the retracted position. A sensor provides a plurality of position feedback signals corresponding to a plurality of sensed positions of the barrier when the barrier moves along the plurality of intermediate positions. A controller receives the plurality of position feedback signals, performs a plurality of comparisons of the plurality of position feedback signals with a stored reference, and generates an output signal based on the compared value.