Abstract:
A cable lift mechanism for a multi panel, overhead garage door includes a drum having a spiral groove comprised of two adjacent sections that are generally coaxial with the longitudinal axis of the cable drum. The groove or grooves in a first section adjacent the attachment end of the cable to the drum have a lesser radius than the remaining grooves of the second section of the drum which have substantially equal radii of greater diameter than the first section radii. As a consequence, initial torque associated with lifting of a garage door is increased to lift a heavier upper or top panel or panels of a multi-panel garage door.
Abstract:
A roller hinge assembly for connecting articulating door panels and simultaneously supporting a laterally extending panel support roller assembly includes multiple uniformly sized hinges having a male hinge strap and a female strap. Two or more such uniformly sized hinge units are arrayed laterally or side by side co-joined by a single hinge pin. Further, to insure appropriate alignment, a tubular roller bushing co-joins the male or the female hinge straps.
Abstract:
A dock door assembly and a dock door assembly kit are provided for use in a dock door opening for installation in a warehouse. The dock door assembly comprises a pair of vertical tracks, with each vertical track configured to be attached to a wall along opposing lateral sides of the dock door opening. The dock door assembly also comprises a multiple, horizontal section door characterized by a vertical height when closed and mounted on the pair of vertical tracks. The dock door assembly further comprises a spring shaft assembly and a pair of headplates with each headplate having a U-shaped opening to receive each end of a torsion shaft. Further, the dock door assembly may comprise a pair of door cables and a pair of corner cable attachments connecting each door cable to the spring shaft assembly.
Abstract:
A roller hinge assembly for connecting articulating door panels and simultaneously supporting a laterally extending panel support roller assembly includes multiple uniformly sized hinges having a male hinge strap and a female strap. Two or more such uniformly sized hinge units are arrayed laterally or side by side co-joined by a single hinge pin. Further, to insure appropriate alignment, a tubular roller bushing co-joins the male or the female hinge straps.
Abstract:
A roller hinge assembly for connecting articulating door panels and simultaneously supporting a laterally extending panel support roller assembly includes one or more hinge units each having a male hinge strap and a female hinge strap. The structural integrity of one or more of the hinge units is supplemented by a reinforcing, slotted tubular member fitted over the roller axle support bushing which extends between and simultaneously engages opposed, spaced hinge strap arms. Two or more such hinge units may be arrayed laterally or side by side co-joined by a single hinge pin. Further, to insure appropriate alignment, a single tubular roller bushing may co-join the male or the female hinge units.
Abstract:
A cable lift mechanism for a multi panel, overhead garage door includes a drum having a spiral groove comprised of two adjacent sections that are generally coaxial with the longitudinal axis of the cable drum. The groove or grooves in a first section adjacent the attachment end of the cable to the drum have a lesser radius than the remaining grooves of the second section of the drum which have substantially equal radii of greater diameter than the first section radii. As a consequence, initial torque associated with lifting of a garage door is increased to lift a heavier upper or top panel or panels of a multi-panel garage door.
Abstract:
A door strut construction includes a strut having a top cross wall connecting lateral side walls that are part of a truncated isosceles triangle and wherein the lateral cross wall joins first and second spaced pylons attached to the top edge of the side walls and further wherein the bottom edge of the side walls include projecting plate members having upstanding, outside lips for reinforcement. The strut further includes lateral ribs positioned in the upper half region of the side walls to improve torsion resistance.
Abstract:
A roller hinge assembly for connecting articulating door panels and simultaneously supporting a laterally extending panel support roller assembly includes one or more hinge units each having a male hinge strap and a female hinge strap. The structural integrity of one or more of the hinge units is supplemented by a reinforcing, slotted tubular member fitted over the roller axle support bushing which extends between and simultaneously engages opposed, spaced hinge strap arms. Two or more such hinge units may be arrayed laterally or side by side co-joined by a single hinge pin. Further, to insure appropriate alignment, a single tubular roller bushing may co-join the male or the female hinge units.