Abstract: Fabric drop-down diffusers are disclosed. An example drop-down diffuser includes a hoop to be supported adjacent an end of an air duct, and a first fabric sheet to hang downward from the hoop. The first fabric sheet to define a first wall of an air chamber adjacent the hoop on a side of the hoop opposite the air duct. The first fabric sheet to completely surround the air chamber along a circumferential path corresponding to the hoop. The hoop to be transverse to the air duct and positioned so that air delivered by the air duct is to pass through the hoop and into the air chamber. The drop-down diffuser also includes a second fabric sheet to be coupled to the first fabric sheet. The second fabric sheet to define a second wall of the air chamber.

Abstract: Fabric drop-down diffusers are disclosed. An example drop-down diffuser includes a hoop to be supported adjacent an end of an air duct, and a first fabric sheet to hang downward from the hoop. The first fabric sheet to define a first wall of an air chamber adjacent the hoop on a side of the hoop opposite the air duct. The first fabric sheet to completely surround the air chamber along a circumferential path corresponding to the hoop. The hoop to be transverse to the air duct and positioned so that air delivered by the air duct is to pass through the hoop and into the air chamber. The drop-down diffuser also includes a second fabric sheet to be coupled to the first fabric sheet. The second fabric sheet to define a second wall of the air chamber.

Abstract: Fabric drop-down diffusers are disclosed. An example drop-down diffuser includes an upper panel including an upper fabric sheet to be held in radial tension by an upper hoop. The upper panel defines a supply air inlet. The example drop-down diffuser further includes a lower panel to be underneath and spaced apart from the upper panel. The example drop-down diffuser also includes a circumferential fabric sheet to encircle the upper panel and the lower panel. The circumferential fabric sheet is to extend downward from the upper panel to the lower panel to define an air chamber bordered by the upper panel, the lower panel and the circumferential fabric sheet. The air chamber is connected in fluid communication with the supply air inlet.

Abstract: Fabric drop-down diffusers are disclosed. An example drop-down diffuser includes an upper panel including an upper fabric sheet to be held in radial tension by an upper hoop. The upper panel defines a supply air inlet. The example drop-down diffuser further includes a lower panel to be underneath and spaced apart from the upper panel. The example drop-down diffuser also includes a circumferential fabric sheet to encircle the upper panel and the lower panel. The circumferential fabric sheet is to extend downward from the upper panel to the lower panel to define an air chamber bordered by the upper panel, the lower panel and the circumferential fabric sheet. The air chamber is connected in fluid communication with the supply air inlet.

Abstract: Fabric silencers for air ducts are disclosed. An example air duct silencer system includes an inner tube being of a first pliable material, the inner tube defining an airway extending along the inner tube. The example air duct silencer system further includes an outer tube being of a second pliable material, the outer tube to encircle the inner tube to define an annular space between the outer tube and the inner tube. The example air duct silencer system also includes a sound absorbing material to be disposed within the annular space.

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 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: Fabric silencers for air ducts are disclosed. An example air duct silencer system includes an inner tube being of a first pliable material, the inner tube defining an airway extending along the inner tube. The example air duct silencer system further includes an outer tube being of a second pliable material, the outer tube to encircle the inner tube to define an annular space between the outer tube and the inner tube. The example air duct silencer system also includes a sound absorbing material to be disposed within the annular space.

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: Inflatable air ducts with low height-to-width ratios are disclosed. An example air duct system includes a top sheet, a bottom sheet, a first side sheet, and a second side sheet spaced apart from the first side sheet and extending between the top sheet and the bottom sheet. The top, bottom, first side, and second side sheets provide an inflatable air duct having an inflated state and a deflated state. The inflatable air duct has an inflated length greater than an inflated width. The inflated width is more than twice as great as an inflated height. The interior of the inflatable air duct defining an air passageway having a first airway, a second airway, and an intermediate airway. The intermediate airway is adjacent the first airway at a first transition area. The example air duct system also includes a second transition area between the intermediate airway and the second airway.

Abstract: Inflatable air ducts with low height-to-width ratios are disclosed. An example air duct system includes a top sheet, a bottom sheet, a first side sheet, and a second side sheet spaced apart from the first side sheet and extending between the top sheet and the bottom sheet. The top, bottom, first side, and second side sheets provide an inflatable air duct having an inflated state and a deflated state. The inflatable air duct has an inflated length greater than an inflated width. The inflated width is more than twice as great as an inflated height. The interior of the inflatable air duct defining an air passageway having a first airway, a second airway, and an intermediate airway. The intermediate airway is adjacent the first airway at a first transition area. The example air duct system also includes a second transition area between the intermediate airway and the second airway.

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: 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: 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: A collapsible toothbrush includes a body member that has a first portion and a second portion. The first portion is pivotally coupled to the second portion such that the first portion is selectively positionable adjacent the second portion facilitating compact storage of the body member. The first portion has a plurality of bristles. The bristles are adapted to be rubbed against teeth of the user for cleaning the teeth of the user. The bristles are positioned opposite the second portion of the body member such that the body member is adapted for is held in a hand of the user when the bristles are used to clean the teeth of the user.