Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the ventilation duct includes support sidewalls fitting in the shaft providing a ventilation passage between support top and bottom openings and a suspension member supported on opposed lateral sidewalls proximate the top opening holding one or more hinge connected panels that manually release to rotationally close the passage and are manually rotationally liftable to a home position allowing ventilation. A releasable latching system between panel and a suspension member holder catches rising panels to hold them in home position ready for release.

Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the underground ventilation duct includes support sidewalls fitting in the shaft providing a ventilation passage between support top and bottom openings and a suspension member supported on opposed lateral sidewalls unobstructively horizontally spanning the passage proximate the top opening and holding one or more hinge connected panels in the passage that manually release to rotationally close the passage and prevent flooding and are manually rotationally liftable to a home position allowing ventilation. The suspension member is liftingly removable from the support and may include end keys received in keyed supports to allow the suspension member to fit in the supports so a specific panel closes to a specific sidewall.

A lighting film which includes a base member having optical transparency, a plurality of protrusions having optical transparency, which are formed to be adjacent to each other on one surface of the base member, and a gap portion formed between the protrusions, in which an area of an end surface of the protrusion on a base member side is greater than an area of an end surface of the protrusion on a side opposite to the base member, and a ratio s/w of an interval s of two adjacent protrusions among the plurality of protrusions to a width w of the protrusion is equal to or less than 0.1.

A lighting film which includes a base member having optical transparency, a plurality of protrusions having optical transparency, which are formed to be adjacent to each other on one surface of the base member, and a gap portion formed between the protrusions, in which an area of an end surface of the protrusion on a base member side is greater than an area of an end surface of the protrusion on a side opposite to the base member, and a ratio s/w of an interval s of two adjacent protrusions among the plurality of protrusions to a width w of the protrusion is equal to or less than 0.1.

A door, in particular vertical-lift door, for closing an opening in a wall, in particular in a wall which separates two different temperature zones from one another, having a movable, flexible door leaf which comprises multiple separate, flexible door leaf layers which are guided such that they are spaced apart from one another in the closed state of the door, and having at least one winding shaft onto which the door leaf can be wound up in order to open the door, in which two adjacent door leaf layers are connected to one another by at least one spacer which ensures a spacing, defined by the spacer, of the two door leaf layers at least in the region of the spacer in the closed state of the door.

A door, in particular vertical-lift door, for closing an opening in a wall, in particular in a wall which separates two different temperature zones from one another, having a movable, flexible door leaf which comprises multiple separate, flexible door leaf layers which are guided such that they are spaced apart from one another in the closed state of the door, and having at least one winding shaft onto which the door leaf can be wound up in order to open the door, in which two adjacent door leaf layers are connected to one another by at least one spacer which ensures a spacing, defined by the spacer, of the two door leaf layers at least in the region of the spacer in the closed state of the door.

Disclosed are vehicle storage containers, methods for making and methods for using vehicle storage containers, and motor vehicles with utility storage containers. Disclosed, for example, is a utility storage container for a motor vehicle. The utility storage container includes a container basin that attaches to the vehicle body and stows within the vehicle's cargo compartment. The container basin includes multiple sidewalls projecting from a base to cooperatively define a basin opening. An articulated door assembly includes a first door segment pivotably coupled to the container basin to transition the door assembly between a closed position, whereat the door segments cooperatively cover the basin opening, and a full-open position, whereat the door segments uncover the opening. A second door segment is pivotably coupled to the first door segment to transition the door assembly between the closed position and a half-open position, whereat the second door segment partially uncovers the basin opening.

Disclosed are vehicle storage containers, methods for making and methods for using vehicle storage containers, and motor vehicles with utility storage containers. Disclosed, for example, is a utility storage container for a motor vehicle. The utility storage container includes a container basin that attaches to the vehicle body and stows within the vehicle's cargo compartment. The container basin includes multiple sidewalls projecting from a base to cooperatively define a basin opening. An articulated door assembly includes a first door segment pivotably coupled to the container basin to transition the door assembly between a closed position, whereat the door segments cooperatively cover the basin opening, and a full-open position, whereat the door segments uncover the opening. A second door segment is pivotably coupled to the first door segment to transition the door assembly between the closed position and a half-open position, whereat the second door segment partially uncovers the basin opening.

Hollow core door apparatus for preventing the build up of pressure in a room having a register through which air flows into the room and the door includes an inside door skin and an outside door skin, and the door skins includes openings through which air flows and a center panel between the skins and spaced part from the skins. The center panel has an outer perimeter greater than the inner perimeter of the openings. The center panel is spaced apart from the skins, and also from the adjacent stiles and rails. A chamber is formed about the panel and between the adjacent stiles and rails and the openings in the skins. Air flow from the room is through the opening in the inside skin into the chamber, around the outer periphery of the panel, and outwardly through the opening in the outside skin in a non-linear manner.

An attic-insulation cover designed to cover access doors leading into attic spaces, such as scuttle holes and vertical attic doors includes an attic insulation flange or border for placement over the attic opening frame, the attic insulation flange having a first top end and a second bottom end, an attic insulation jacket having a top wall, parallel side walls, parallel end walls and a bottom panel; and a closure device at the second bottom end of the attic-insulation flange for connecting the attic insulation flange and the attic insulation jacket.