An overhead door system including a frame, a door leaf and a first hydraulic cylinder. The door leaf is pivotally mounted to the frame. The first hydraulic cylinder has a first cylinder end and a second cylinder end. The first cylinder end is operably attached to the frame. The second cylinder end is operably attached to the door leaf. The first hydraulic cylinder is capable of moving the door leaf between a closed configuration and an open configuration. At least one of the frame and the upper door panel has a slot formed therein. When the door leaf is in the closed configuration, the first hydraulic cylinder is substantially recessed in the slot.

A threshold sealing system for a door panel assembly includes a threshold biasing element and an anchor. The threshold biasing element including a base configured to attach to a floor surface and a biasing surface extending at an oblique angle relative to the base. The anchor is configured to secure the base of the threshold biasing element to the floor. The anchor and the threshold biasing element may be integrally formed and include the same materials. The oblique angle of the biasing surface ranges from 70 degrees to 80 degrees and has a height of at least 1.5 inches.

A main tilting door for the closure of an access opening of a room comprises two fixed uprights and one fixed crosspiece associable with each other to define a fixed frame. The fixed uprights comprise vertical sliding guides; two movable uprights and two movable crosspieces associable with each other to define a movable frame; tilting movement means comprising: two lateral supporting arms each having a first end which can be hinged to an intermediate area of the movable uprights and a second end which can be hinged to a top of the fixed uprights; two sliding supports movable along the vertical sliding guides; a plurality of panels associable with the movable frame; wherein at least one of said movable uprights and said movable crosspieces comprises a sliding track and a plurality of cursors movable along the sliding track, the panels being associable with the cursors.

A hinge assembly includes first and second linkage rods pivoted to a base seat, a cam connected to the first and second linkage rods, and a kickstand support pivoted to the cam. A latch is disposed in the cam. When the first and second linkage rods, the kickstand support, and the cam are received inside the base seat, the latch is in a first locking position, where the latch locks rotational movement of the kickstand support relative to the cam. When the second linkage rod moves outward of the base seat and brings the first linkage rod to rotate relative to the cam, the latch is pushed by the kickstand support to move into a second locking position, where the first linkage rod is limited from rotating relative to the cam.

A hinge assembly includes first and second linkage rods pivoted to a base seat, a cam connected to the first and second linkage rods, and a kickstand support pivoted to the cam. A latch is disposed in the cam. When the first and second linkage rods, the kickstand support, and the cam are received inside the base seat, the latch is in a first locking position, where the latch locks rotational movement of the kickstand support relative to the cam. When the second linkage rod moves outward of the base seat and brings the first linkage rod to rotate relative to the cam, the latch is pushed by the kickstand support to move into a second locking position, where the first linkage rod is limited from rotating relative to the cam.

A threshold sealing system for a door panel assembly includes a threshold biasing element and an anchor. The threshold biasing element including a base configured to attach to a floor surface and a biasing surface extending at an oblique angle relative to the base. The anchor is configured to secure the base of the threshold biasing element to the floor. The anchor and the threshold biasing element may be integrally formed and include the same materials. The oblique angle of the biasing surface ranges from 70 degrees to 80 degrees and has a height of at least 1.5 inches.

A main tilting door for the closure of an access opening of a room includes two fixed uprights, including vertical sliding guides, and one fixed crosspiece associable with each other to define a fixed frame. The door includes two movable uprights and two movable crosspieces associable with each other to define a movable frame. The door includes tilting movement device/unit/component/apparatus or the like including two lateral supporting arms each having a first end which can be hinged to an intermediate area of the movable uprights and a second end which can be hinged to a top of the fixed uprights; and two sliding supports movable along the vertical sliding guides. The door includes panels associable with the movable frame. At least one of the movable uprights and the movable crosspieces includes a sliding track and cursors movable along the sliding track, the panels associable with the cursors.

A kit for the assembly of a main door comprises at least two fixed uprights and at least one fixed crossbeam, associable with each other to define a fixed frame that can be attached to an access opening of a compartment, wherein the access opening has relevant reference dimensions; at least two movable uprights and a plurality of panels, associable with the movable uprights to define a movable leaf; a movement device/structure/component/element/unit/apparatus, associable between the movable uprights and the fixed frame; where at least one of the fixed uprights, the fixed crossbeam and the movable uprights is made according to respective predefined standard dimensions, which are bigger than the reference dimensions, and comprises at least one related trimmable portion, provided with at least one graduated reference scale adapted to allow the cutting of the trimmable portion depending on the reference dimensions.