Protective grille

Claim 2

A folding closure comprising: a foldable curtain, having first and second opposed side edges, the curtain including a plurality of support rods and a plurality of panels, rodreceiving means on opposed sides of each panel, said panels being mounted on said rods by the rod-receiving means to form an open pattern when the curtain is unfolded, an extensible hinge, means suspending said curtain from said hinge, means connecting the first side edge of said curtain to a first frame member, means connecting the second side edge of the curtain to a second frame member, comprising a tubular body member having side walls and end walls, each end wall including a removable wall panel, cooperating means on said end wall and panel for slidably mounting the panel on said end wall to form a part thereof, one face of said panel being planar, the other face of said panel having tubular sections carried thereby, said tubular sections forming a portion of the means connecting the side edges of the curtains to the first and second frame members, and means movably suspending said second frame member and the extensible hinge from a third frame member.

Claim 3

A folding closure as claimed in claim 1, wherein said panels forming part of the curtain comprise rectangular plates, and said rod-receiving means comprise tubular sections attached to two opposed side edges of the plate.

Claim 4

A folding closure as claimed in claim 2, wherein said means for connecting said curtain to said frames include the tubular sections on the reversible wall panels, selected tubular sections on said panels forming part of the curtain, and a pivot rod threaded through said tubular sections on said reversible wall panels and on said curtain panels.

Claim 5

A folding closure as claimed in claim 2, wherein said tubular sections on one plate, mounted on a first pair of adjacent rods, support the tubular sections of plates mounted on a second pair of adjacent rods, one of the rods of the first pair and one of the rods of the second pair being the same rod.

Claim 6

A folding closure as claimed in claim 1, wherein said hinge comprises a chain of first links, means pivotably connecting the links together at their ends, secondary hinges, each comprising a pair of second links substantially half the length of the first links and joined together at one end by a pivot pin, the free end of each second link joined to the center of a first link whereby each pair of first links has a secondary hinge joined to it.

Claim 7

A folding closure comprising: a foldable curtain, having first and second opposed side edges, the curtain including a plurality of support rods and a plurality of panels, rod-receiving means on opposed sides of each panel, said panels being mounted on said rods by the rod-receiving means to form an open pattern when the curtain is unfolded, an extensible hinge comprising a chain of first links, means pivotably connecting the links together at their ends, secondary hinges, each comprising a pair of second links substantially half the length of the first links and joined together at one end by a pivot pin, the free end of each second link joined to the center of a first link whereby each pair of first links has a secondary hinge joined to it, means suspending said curtain from said hinge, means connecting the first side edge of said curtain to a first frame member, means connecting the second side edge of the curtain to a second frame member, and means movably suspending said second frame member and the extensible hinge from a third frame member.

Claim 8

A folding closure comprising: a foldable curtain, having first and second opposed side edges, the curtain including a plurality of support rods and a plurality of panels, rod-receiving means on opposed sides of each panel, said panels being mounted on said rods by the rod-receiving means to form an open pattern when the curtain is unfolded, an extensible hinge comprising a chain of first links, means pivotably connecting the links together at their ends, secondary hinges, each comprising a pair of second links substantially half the length of the first links and joined together at one end by a pivot pin, the free end of each second link joined to the center of a first link whereby each pair of first links has a secondary hinge joined to it, means suspending said curtain from said hinge, means connecting the first side edge of said curtain to a first frame member, means connecting the second side edge of the curtain to a second frame member, and means movably suspending said second frame member and the extensible hinge from a third frame member.

Claim 9

A folding closure as claimed in claim 6, wherein a support rod extends from each pivotal connection between the first links, and a support rod extends from each first link where the free end of each second link is joined to the first link.

Claim 10

A folding closure as claimed in claim 6, wherein all the pivot pins joining the second links of the secondary hinges are located on one side or the other of the chain of first links.

Claim 11

A folding closure as claimed in claim 6, wherein the means for suspending the curtain includes a plurality of hangers, said third member having a track, means on the hangers movably mounting them in said track, there being one hanger connected to every second first link.

Claim 12

A folding closure comprising: a foldable curtain, having first and second opposed side edges, the curtain including a plurality of support rods and a plurality of panels, rod-receiving means on opposed sides of each panel, said panels being mounted on said rods by the rod-receiving means to form an open pattern when the curtain is unfolded, an extensible hinge, means suspending said curtain from said hinge, means connecting the first side edge of said curtain to a first frame member, means connecting the second side edge of the curtain tO a second frame member, and means movably suspending said second frame member and the extensible hinge from a third frame member, including an intermediate frame member located between said first and second frame members, said intermediate frame member having end walls with a removable, reversible wall panel forming a section of each end wall, tubular sections on one face only of the wall panels, said panels mounted so said tubular sections face outwardly, said curtain being divided into two sections, means connecting one free edge of each curtain section to the tubular sections facing outwardly from the intermediate frame member, the opposed edges of each curtain section connected to the first and second frame members.

Claim 13

A folding closure comprising: a foldable curtain, having first and second opposed side edges, the curtain including a plurality of support rods and a plurality of panels, rod-receiving means on opposed sides of each panel, said panels being mounted on said rods by the rod-receiving means to form an open pattern when the curtain is unfolded, an extensible hinge, means suspending said curtain from said hinge, means connecting the first side edge of said curtain to a first frame member, means connecting the second side edge of the curtain tO a second frame member, and means movably suspending said second frame member and the extensible hinge from a third frame member, including an intermediate frame member located between said first and second frame members, said intermediate frame member having end walls with a removable, reversible wall panel forming a section of each end wall, tubular sections on one face only of the wall panels, said panels mounted so said tubular sections face outwardly, said curtain being divided into two sections, means connecting one free edge of each curtain section to the tubular sections facing outwardly from the intermediate frame member, the opposed edges of each curtain section connected to the first and second frame members.

Claim 14

A folding closure as claimed in claim 10, wherein the intermediate frame member includes a locking device, means mounting said locking device within said frame member, said locking device including a pin movable vertically downwardly from a raised, unlocked position to a locked position where the end of the pin rests in a depression formed in a floor.

Claim 15

A folding closure as claimed in claim 10, wherein said hinge comprises a chain of first links, means pivotably connecting the links together at their ends, secondary hinges, each comprising a pair of second links substantially half the length of the first links and joined together at one end by a pivot pin, the free end of each second link joined to the center of a first link whereby each pair of first links has a secondary hinge joined to it.