Roll-type door

Claim 2

A roll-type door assembly mountable upon wall means and having a door movable between open and closed positions with respect to an opening in said wall means, comprising: head means adapted to be mounted upon said wall means near the upper end of said opening; horizontal shaft means rotatably supported by said head means, said head means Including a pair of spaced head plates near the opposite ends of said shaft means and a pair of hub means mounted on said head plates, said hub means having openings through which said shaft means extends and in which said shaft means is rotatably supported; a plurality of coaxial, annular members of substantially equal diameter, said members being nonrotatably supported relative to said shaft means and some of said members being rigidly secured to said shaft means at spaced intervals lengthwise thereof; door means having a plurality of relatively narrow, relatively stiff and horizontally hinged slats, at least one of said slats being rigidly secured to said annular members whereby rotation of said shaft means effects rolling or unrolling of said door means around said annular members; a pair of upright and spaced guide track means adapted to be secured to said wall means adjacent the opposite upright edges thereof defining said opening therein, said guide track means being arranged to slideably receive and guide the opposite, lateral edges of said door means as said door means is moved between its open and closed positions; spring means adjacent said shaft means and connected between said head means and said shaft means for yieldably resisting rotation of said shaft means in the door unrolling direction, said spring means including a pair of spiral springs, one end of each being connected respectively to one of said hub means and the other end of each being connected to said shaft means; and at least one of said annular members being rigidly secured to said shaft means between said spiral springs and two further said annular members being rotatably supported adjacent said hub means.

Claim 3

A roll-type door according to claim 1, wherein a plurality of said slats disposed adjacent the upper edge of said closure means are rigidly secured to said annular members.

Claim 4

A roll-type door assembly according to claim 1, including drive means connected to said shaft means for effecting rotation thereof; and wherein each of said annular members has a peripheral, axially extending and integral flange having a plurality of spaced, radial projections, the circumferential centerline distance between each pair of adjacent projections being approximately equal to an even multiple of the distance between the hinge axes of a slat.

Claim 5

A roll-type door assembly according to claim 1, including a threshold sealing element secured to the lowermost slat in said door means, said sealing element extending between the adjacent edges of, but not into, said track means.

Claim 6

A roll-type door assembly mountable upon wall means and having a door movable between open and closed positions with respect to an opening in said wall means, comprising: support means adapted to be mounted upon said wall means near the upper end of said opening; horizontal shaft means rotatably supported by said support means, said support means including a pair of spaced support members near the opposite ends of said shaft means on which said shaft means is rotatably supported; a plurality of coaxial, annular members of substantially equal diameter, said annular members being concentric with and nonrotatably connected to said shaft means and being positioned relative to said shaft means at spaced intervals lengthwise thereof; door means having a plurality of relatively narrow, relatively stiff and horizontally hinged slats, several of said slats adjacent the upper edge of said door means being rigidly secured to said annular members whereby rotation of said shaft means effects rolling or unrolling of said door means around said annular members; a pair of upright and spaced guide track means adapted to be secured to said wall means adjacent the opposite upright edges thereof defining said opening therein, said guide track means being arranged to slideably receive and guide the opposite, lateral edges of said door means as said door means is moved between its open and closed positions; spring means adjacent said shaft means and connected between said support means and said shaft means for yieldably resisting rotation of said shaft means in the door unrolling direction, said spring means including a pair of spiral springs disposed in surrounding relationship to said shaft means, one end of each spring being connected respectively to one of said support members and the other end of each spring being connected to said shaft means, and said plurality of slats as rigidly secured to said annular members partially surrounding said springs, said plurality of slats being the only wall structure surrounding said springs whereby said springs are easily accessible; and at least one of said annular members being rigidly secured to said shaft means between said spiral springs and two further said annular members being disposed adjacent the opposite ends of said shaft means, said two further annular members being rotatably supported relative to and substantially adjacent said support member.

Claim 7

A roll-type door assembly mountable upon wall means and having a door movable between open and closed positions with respect to an opening in said wall means, comprising: support means adapted to be mounted upon said wall means near the upper end of said opening; horizontal shaft means rotatably supported by said support means, said support means including a pair of spaced support members near the opposite ends of said shaft means on which said shaft means is rotatably supported; a plurality of coaxial, annular members of substantially equal diameter, said annular members being concentric with and nonrotatably connected to said shaft means and being positioned relative to said shaft means at spaced intervals lengthwise thereof; door means having a plurality of relatively narrow, relatively stiff and horizontally hinged slats, several of said slats adjacent the upper edge of said door means being rigidly secured to said annular members whereby rotation of said shaft means effects rolling or unrolling of said door means around said annular members; a pair of upright and spaced guide track means adapted to be secured to said wall means adjacent the opposite upright edges thereof defining said opening therein, said guide track means being arranged to slideably receive and guide the opposite, lateral edges of said door means as said door means is moved between its open and closed positions; spring means adjacent said shaft means and connected between said support means and said shaft means for yieldably resisting rotation of said shaft means in the door unrolling direction, said spring means including a pair of spiral springs disposed in surrounding relationship to said shaft means, one end of each spring being connected respectively to one of said support members and the other end of each spring being connected to said shaft means, and said plurality of slats as rigidly secured to said annular members partially surrounding said springs, said plurality of slats being the only wall structure surrounding said springs whereby said springs are easily accessible; and at least one of said annular members being rigidly secured to said shaft means between said spiral springs and two further said annular members being disposed adjacent the opposite ends of said shaft means, said two further annular members being rotatably supported relative to and substantially adjacent said support member.