Operator for a rolling and overhead door assembly

Details Operator for a rolling and overhead door assembly Operator for a rolling and overhead door assembly

E - Fixed Constructions

06

B

E06B 9/70 (2006.01) E06B 9/68 (2006.01)

Patent

CA 2110383

2110383 9221846 PCTABS00017 A rolling or overhead door assembly includes a shaft (34) having an external thread (66) bounded by a first and second bearing surface (62 and 64), a hub (60) screwingly engaging the shaft (34) and adapted to travel along the shaft (34), a first sprocket (36) rotatably mounted on said first bearing surface (62) and operably connected with a take-down device for unrolling a flexible door and a second sprocket (38) mounted on said second bearing surface (64) and operably connected with a take-up roller for rolling up the door, and abutments (54) on opposite sides of said first (36) and second sprocket (38). Rotation of the shaft (34) advances the hub (60) along to frictionally engage the first sprocket (36) to rotate together and upon counter rotation of the shaft (34) the hub (60) advances back along the shaft (34) to frictionally engage the second sprocket (38) until the second sprocket (38) and shaft (34) rotate together.

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