Abstract: A cable tensioner (20) for a sectional overhead door (D) having a motor-driven counterbalance system (30) including, a spring-loaded axle (31), cable drums (24) carried by the axle, cables (C) attached to and interconnecting the cable drums and the door and forming and releasing cable wraps (29) on the cable drums upon raising and lowering of the door, the cable tensioner having, a tension spring (31) adapted to be mounted on the sectional door having a first end (34) and a second end (35), the first end being adapted to engage the door and the second end being adapted to slidingly engage the cable, wherein the tension spring urges the second end to take up any slack in the cable.

Abstract: A door system (10) used in connection with an opening defined by a pair of jambs (11) and a laterally extending header (12) connecting the jambs, the door system including, a pair of tracks (15) mountable on the jambs, the tracks having a vertical track section (16) running adjacent the jambs, wherein a space (25) is defined between the tracks and the jambs along at least a portion of their length, a door (D) mounted for movement on the tracks and movable between an open position and a closed position, and a shield (30) mounted laterally outward of the tracks and adjacent thereto, the shield extending rearward from the jamb and overlying at least a portion of the tracks along the length of the vertical track section, wherein the overlying portion of the shield contacts the vertical track section along the length thereof.

Abstract: A transition shield for a door system (10) having a pair of tracks (15), which include a vertical track section (16) and a horizontal track section (17) connected by a transition track section (18) supported at least partially by a door jamb (11) to prevent objects from entering a transition space defined between the jamb and the transition track section, the transition shield (60) including a plate-like member (61) having a vertically extending forward edge (64) configured to fit proximate the jamb and extending rearward an extent sufficient to overly at least a portion of the transition track section to cover the transition space.