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An access door is suitable for installation in a structure such as a building and allows ready access to an enclosed region of the structure. The access door includes a door frame that can be mounted on the structure and that forms an access opening. A panel removably covers the access opening on an

An access door is suitable for installation in a structure such as a building and allows ready access to an enclosed region of the structure. The access door includes a door frame that can be mounted on the structure and that forms an access opening. A panel removably covers the access opening on an exterior side of the door frame. Two parallel connecting links are pivotably connected both to the door frame and to the panel in a manner permitting the panel to be moved from an open position where the access opening is uncovered to a closed position where the panel covers the access opening. A frame member connects the two links together in a rigid manner. One or more threaded fasteners can be used to detachably connect the panel so that it is secured in the closed position. In one embodiment, a single screw can detachably connect the panel to a pivotable connecting frame that includes the two links. In another version, the panel can be detachably and directly connected to the door frame by fasteners.

대표청구항 ▼

An access door is suitable for installation in a structure such as a building and allows ready access to an enclosed region of the structure. The access door includes a door frame that can be mounted on the structure and that forms an access opening. A panel removably covers the access opening on an

An access door is suitable for installation in a structure such as a building and allows ready access to an enclosed region of the structure. The access door includes a door frame that can be mounted on the structure and that forms an access opening. A panel removably covers the access opening on an exterior side of the door frame. Two parallel connecting links are pivotably connected both to the door frame and to the panel in a manner permitting the panel to be moved from an open position where the access opening is uncovered to a closed position where the panel covers the access opening. A frame member connects the two links together in a rigid manner. One or more threaded fasteners can be used to detachably connect the panel so that it is secured in the closed position. In one embodiment, a single screw can detachably connect the panel to a pivotable connecting frame that includes the two links. In another version, the panel can be detachably and directly connected to the door frame by fasteners. paced stiffeners selected from the group consisting of bars and tubing, said spaced stiffeners being encapsulated into said fire curtain for providing stiffness to said fire curtain, wherein one stiffener designated the uppermost stiffener has holes near the ends thereof corresponding to the upper two holes in the fire curtain, and one stiffener designated the lowermost stiffener has holes near the ends thereof corresponding to the lower two holes in the fire curtain; (c) an upper set of curtain connectors selected from the group consisting of cable leaders and ropes, each of said curtain connectors having a first end having means for attaching to the fire curtain and a second end having a loop, each of said curtain connectors being attached their first ends to each of the two upper corners of said fire curtain at their holes; (d) a lower set of curtain connectors selected from the group consisting of cable leaders and ropes, each of said curtain connectors having a first end having means for attaching to the fire curtain and a second end having a loop, each of said curtain connectors being attached at their first ends to each of the two lower corners of said fire curtain at their holes; (e) an upper bag connector deployment bag having a mouth and a bottom, said upper bag connector deployment bag having a bag connector therein, said bag connector having a first end and a second end, said bag connector being secured near its middle to the bottom of said bag connector deployment bag, said first end and said second end of bag connector having means for attaching to the loops at the second ends of said curtain connectors attached to said upper corners of said fire curtain; and (f) a lower bag connector deployment bag having a mouth and a bottom, said lower bag connector deployment bag having a bag connector therein, said bag connector having a first end and a second end, said bag connector being secured near its middle to the bottom of said bag connector deployment bag, said first end and said second end of bag connector having means for attaching to the loops at the second ends of said curtain connectors attached to said lower corners of said fire curtain. 2. The portable fire curtain system of claim 1 wherein the bag connector is a rope and the lower bag connector deployment bag is a lower rope deployment bag, said lower rope deployment bag having a hole in the bottom thereof and a portion of said rope near its middle protrudes out of said hole, said portion of said protruding rope having a snap attached thereto for attaching a weight thereto. 3. The portable fire curtain system of claim 1 wherein said fire curtain is one elongated sheet of material which is folded and sewn together. 4. The portable fire curtain system of claim 3 wherein the fire curtain is sewn together with a fire resistant thread. 5. The portable fire curtain system of claim 3 wherein the fire curtain is made of Basofil and Kevlar weave. 6. The portable fire curtain system of claim 1 wherein said plurality of spaced stiffeners are substantially parallel to the upper and lower edges of said fire curtain. 7. The portable fire curtain system of claim 1 wherein said bag connector is rope, and: (a) said upper bag connector deployment bag is an upper rope deployment bag, said upper rope deployment bag having a central divider which separates the upper rope deployment bag into two pockets, said central divider having a top edge near the mouth of said upper rope deployment bag, and a bottom edge joined to the bottom of said upper rope deployment bag; (b) the rope is secured in the upper rope deployment bag such that substantially half its length resides in the first pocket and the other half its length resides in the second pocket, whereby tangling of the two half sections of rope is minimized; (c) said lower bag connector deployment bag is a lower rope deployment bag, said lower rope deployment bag having a central divider which separates the lower rope d eployment bag into two pockets, said central divider having a top edge near the mouth of said lower rope deployment bag, and a bottom edge joined to the bottom of said lower rope deployment bag; (d) the lower rope deployment bag has a hole in the bottom thereof and a portion of said rope near its middle protrudes out of said hole, said portion of said protruding rope having a snap attached thereto for attaching a weight thereto, and said rope is secured in the lower rope deployment bag such that substantially half its length resides in the first pocket and the other half its length resides in the second pocket, whereby tangling of the two half sections of rope is minimized. 8. The portable fire curtain system of claim 7, wherein: (a) the central divider in the upper rope deployment bag has two holes therethrough near its bottom edge, and the rope passes through the two holes and is knotted around the portion of the central divider between the two holes; (b) the lower rope deployment bag has two holes in the bottom thereof, one hole being in the first pocket and the other hole being in the second pocket; (c) the central divider in the lower rope deployment bag has a top edge near the mouth of said lower rope deployment bag, and a bottom edge joined to the bottom of said lower rope deployment bag, said central divider having two holes therethrough near its bottom edge, said rope being knotted around the portion of the central divider between the two holes in said divider, and being knotted at the point where said rope protrudes through the two holes in the bottom of the lower rope deployment bag. 9. The portable fire curtain system of claim 1, wherein the plurality of spaced stiffeners are high tempered aluminum bars. 10. The portable fire curtain system of claim 1 wherein the curtain connectors are cables, the bag connectors are ropes and: (a) said means for attaching the cables to the fire curtain is selected from the group consisting of clips, loops, and snaps; and (b) said means for attaching first and second ends of the rope to a cable leader is selected from the group consisting of clips and snaps. 11. The portable fire curtain system of claim 1 wherein the upper two holes and the lower two holes in the fire curtain are reinforced with grommets. 12. The portable fire curtain system of claim 1 further comprising a tote bag for carrying said portable fire curtain system. 13. The portable fire curtain system of claim 1 wherein the curtain connectors are cables, and: (a) the loop at the second end of each of said cables further comprises: (i) a double ferrule to form and secure that loop, and (ii) a single ferrule to inhibit fraying of the cable end; and (b) the loop at the first end of each of said cables further comprises: (i) a cable thimble to prevent chafing of the cable loop on the rectangular piece of material at its grommet, and (ii) a double ferrule to form and secure that loop, and (iii) a single ferrule to inhibit fraying of the cable end. 14. The portable fire curtain system of claim 1 wherein the plurality of spaced stiffeners are substantially parallel to and equidistant from one another. 15. A portable fire curtain system for affixing vertically to a building opening so as to block the building opening, said portable fire curtain system comprising: (a) a fire curtain comprising a substantially rectangular elongated sheet of fire resistant material which is folded and sewn together, said elongated sheet of fire resistant material when positioned vertically having an upper edge, a lower edge, two side edges, a front side, and a back side, said piece of material thus having two upper corners and two lower corners, each of said two upper corners having a hole located a predetermined distance therefrom, said holes being desighated the upper two holes, each of said lower two corners having a hole located a predetermined distance therefrom, said holes being designated the lower two hol