A first constituent member constructed such that at least portions of a plurality of panels overlap and a second constituent member constructed such that at least portions of a plurality of panels overlap are included, in which the first constituent member and the second constituent member are connected to a link member that can be expanded and contracted, the first constituent member and the second constituent member are expanded and contracted by expansion and contraction of the link member, and the first constituent member and the second constituent member can relatively be rotated around rotation axes.

A first constituent member constructed such that at least portions of a plurality of panels overlap and a second constituent member constructed such that at least portions of a plurality of panels overlap are included, in which the first constituent member and the second constituent member are connected to a link member that can be expanded and contracted, the first constituent member and the second constituent member are expanded and contracted by expansion and contraction of the link member, and the first constituent member and the second constituent member can relatively be rotated around rotation axes.

A first constituent member configured such that a plurality of panels overlaps and a second constituent member configured such that a plurality of panels overlaps are included, in which a first link member that can be expanded and contracted is connected to the first constituent member, a second link member that can be expanded and contracted is connected to the second constituent member, each of the constituent members can be expanded and contracted by expansion and contraction of each of the link members, the first constituent member and the second constituent member can relatively be rotated around rotation axes and also can removably be connected, the first link member and the second link member are connected to both ends of connecting link arm members via a free joint respectively, and the first link member and the second link member can be separated from each other.

A method and apparatus according to which a blast resistant shelter is assembled. The blast resistant shelter includes first and second structural members, a third structural member coupled to the first and second structural members, a first airway adjacent the third structural member, and a first blast panel pivotably mounted to the third structural member and adapted to pivot thereabout in response to a blast wave. In a first configuration, the first blast panel is detachably connected to a first portion of the blast resistant shelter and prevented from pivoting about the third structural member so that the first blast panel obstructs air flow through the first airway. In a second configuration, in response to the blast wave, the first blast panel is detached from the first portion of the blast resistant shelter and permitted to pivot about the third structural member to permit air flow through the first airway.

A method and apparatus according to which a blast resistant shelter is assembled. The blast resistant shelter includes first and second structural members, a third structural member coupled to the first and second structural members, a first airway adjacent the third structural member, and a first blast panel pivotably mounted to the third structural member and adapted to pivot thereabout in response to a blast wave. In a first configuration, the first blast panel is detachably connected to a first portion of the blast resistant shelter and prevented from pivoting about the third structural member so that the first blast panel obstructs air flow through the first airway. In a second configuration, in response to the blast wave, the first blast panel is detached from the first portion of the blast resistant shelter and permitted to pivot about the third structural member to permit air flow through the first airway.

A foldable staircase that can be easily transported and conveniently used rather than a ladder. The foldable staircase includes a lower staircase and an upper staircase. The upper staircase and the lower staircase are constructions that bridge vertical distances and provide platforms allowing the user to walk up or down the foldable staircase. The foldable staircase provides an alternative means to reach high areas that is easy and safe to ascend or descend as conventional stairways and staircases along with the transportability of a conventional ladder. The foldable staircase can be adjusted to a collapsed configuration or operative configuration. The collapsed configuration allows a user to store or easily transport the foldable staircase. The operative configuration allows the user to ascend or descend the foldable staircase.

A transportable structure having a roof section which is moveable between a collapsed configuration and an erected configuration is disclosed. In the collapsed configuration, panels of the roof section rest on the structure so as to bear down against at least one wall of the structure. In the erected configuration, panels of the roof section converge upwardly to form a gabled roof covering the structure. Method of transporting and erecting the structure at a site is also disclosed.

A method and apparatus according to which a blast resistant shelter is assembled. The blast resistant shelter includes first and second structural members, a third structural member coupled to the first and second structural members, a first airway adjacent the third structural member, and a first blast panel pivotably mounted to the third structural member and adapted to pivot thereabout in response to a blast wave. In a first configuration, the first blast panel is detachably connected to a first portion of the blast resistant shelter and prevented from pivoting about the third structural member so that the first blast panel obstructs air flow through the first airway. In a second configuration, in response to the blast wave, the first blast panel is detached from the first portion of the blast resistant shelter and permitted to pivot about the third structural member to permit air flow through the first airway.

A structure which includes a rectangular base and two substantially U-shaped assemblies pivotally fixed to respective opposed longitudinal edges of the base, the assemblies being movable, relative to the base, into a compact configuration which is substantially of the shape and size of a conventional shipping container, and away from each other to an operative configuration at which the assemblies form walls and at least part of a roof of the structure.

The deployable vehicle cover is a mechanical device. The deployable vehicle cover is configured for use with a vehicle. The deployable vehicle cover creates a protected space that contains the vehicle. The deployable vehicle cover protects the vehicle from the weather. The deployable vehicle cover is a collapsible structure. The deployable vehicle cover is a remotely controlled structure. The deployable vehicle cover comprises a drive mount, a supporting mount, and a framework structure. The framework structure attaches to the drive mount and the supporting mount. The supporting mount forms a mechanical linkage with the drive mount. The framework structure forms the protected space that contains the vehicle. The drive mount generates the motive forces necessary to deploy and retract the framework structure. The drive mount is remotely controlled.