An overhead door operator system (1) for opening and closing an opening (2), comprising a door frame (3) comprising a first frame section (4) at a first side (7) of the opening (2) and a second frame section (6) at a second side (5) of the opening (2). The operator system further comprises a door (8) arranged to be moved between an open and closed (C) position, the door (8) being movably connected to the door frame (3) and a drive unit (10) mounted on the door (8), the drive unit (10) comprising at least one motor (11) arranged to move the door (8) from the closed position (C) to the open position (O). An elongated transmission member (19) extends along the first side (7) of the opening (2) and the first frame section (4). The drive unit (10) further comprises a driven transmission member (18) in driving connection with the motor (11).

An example cable tension device is provided. The cable tension device includes a bracket, an arm, and a spring. The arm is rotatably coupled to the bracket and comprises a roller bar to receive a cable of an overhead door. The spring is coupled to the arm. The spring is under a load to cause the arm to rotate away from the bracket to maintain a tension on the cable.

An example cable tension device is provided. The cable tension device includes a bracket, an arm, and a spring. The arm is rotatably coupled to the bracket and comprises a roller bar to receive a cable of an overhead door. The spring is coupled to the arm. The spring is under a load to cause the arm to rotate away from the bracket to maintain a tension on the cable.

In example implementations, an end cap for a panel of a vertically stacking panel door is provided. The end cap includes a body to be coupled to an end of a panel of a vertically stacking panel door, a first track wheel coupled to the body, a second track wheel coupled to the body, and a vertical stability roller coupled to the body, wherein the first track wheel, the second track wheel, and the vertical stability roller are arranged along a vertical line, wherein the first track wheel is located vertically above the second track wheel and the vertical stability roller is located between the first track wheel and the second track wheel.

In example implementations, an end cap for a panel of a vertically stacking panel door is provided. The end cap includes a body to be coupled to an end of a panel of a vertically stacking panel door, a first track wheel coupled to the body, a second track wheel coupled to the body, and a vertical stability roller coupled to the body, wherein the first track wheel, the second track wheel, and the vertical stability roller are arranged along a vertical line, wherein the first track wheel is located vertically above the second track wheel and the vertical stability roller is located between the first track wheel and the second track wheel.

A method of arranging an overhead sectional door (SD) in a doorframe (10; 20) that defines a door opening, the overhead sectional door (SD) comprising a plurality of door panel sections (100; 200; 300; 400; 500). The method disclosed herein involves: a) fitting a first door panel section (100) in the doorframe (10; 20), b) fitting a second door panel section (200) in the doorframe (10; 20), and c) actuating an electric motor (M) to cause the first door panel section (100) to push the section door panel section (200) a distance in an upward direction. The method further involves: d) securing the second door panel section (200) with respect to the doorframe (10; 20), e) causing said at least one electric motor (M) to move the first door panel section (100) a distance in a downward direction, thereby leaving a space (60) between the secured door panel section and the first door panel section (100), f) fitting a next door panel section (300; 400; 500) in the space (60), and g) causing said at least one electric motor (M) to move the first door panel section (100) a distance in an upward direction. Further, the method involves: h) unsecuring the secured door panel section (200; 300; 400; 500) with respect to the doorframe (10; 20), causing said at least one electric motor (M) to move the first door panel section (100) a further distance in an upward direction, engaging the top edge of the next door panel section (300; 400; 500) with the bottom edge of the previously secured door panel section (200; 300; 400; 500), and securing the next door panel section (300; 400; 500) with respect to the doorframe (10; 20). The method also involves repeating steps e) to h) for each next door panel section (300; 400; 500) until at least all but a last door panel section of the overhead sectional door (SD) have been arranged.

A method of arranging an overhead sectional door (SD) in a doorframe (10; 20) that defines a door opening, the overhead sectional door (SD) comprising a plurality of door panel sections (100; 200; 300; 400; 500). The method disclosed herein involves: a) fitting a first door panel section (100) in the doorframe (10; 20), b) fitting a second door panel section (200) in the doorframe (10; 20), and c) actuating an electric motor (M) to cause the first door panel section (100) to push the section door panel section (200) a distance in an upward direction. The method further involves: d) securing the second door panel section (200) with respect to the doorframe (10; 20), e) causing said at least one electric motor (M) to move the first door panel section (100) a distance in a downward direction, thereby leaving a space (60) between the secured door panel section and the first door panel section (100), f) fitting a next door panel section (300; 400; 500) in the space (60), and g) causing said at least one electric motor (M) to move the first door panel section (100) a distance in an upward direction. Further, the method involves: h) unsecuring the secured door panel section (200; 300; 400; 500) with respect to the doorframe (10; 20), causing said at least one electric motor (M) to move the first door panel section (100) a further distance in an upward direction, engaging the top edge of the next door panel section (300; 400; 500) with the bottom edge of the previously secured door panel section (200; 300; 400; 500), and securing the next door panel section (300; 400; 500) with respect to the doorframe (10; 20). The method also involves repeating steps e) to h) for each next door panel section (300; 400; 500) until at least all but a last door panel section of the overhead sectional door (SD) have been arranged.

A door having a door body that can be lifted, along a predetermined path, from a closed position in which it closes a wall opening into an open position in which it is located substantially overhead, the door body having two, three or more door body elements arranged one on top of the other in the closed position, is modified according to the invention in that a lower edge of the door body in the closed position and trailing during the lifting can be lifted separately, when the door reaches the open position, by a pivoting movement of a lower door body element having said edge in a lifting direction with respect to a door body element situated above it in the closed position relative to the predetermined path.

A door having a door body that can be lifted, along a predetermined path, from a closed position in which it closes a wall opening into an open position in which it is located substantially overhead, the door body having two, three or more door body elements arranged one on top of the other in the closed position, is modified according to the invention in that a lower edge of the door body in the closed position and trailing during the lifting can be lifted separately, when the door reaches the open position, by a pivoting movement of a lower door body element having said edge in a lifting direction with respect to a door body element situated above it in the closed position relative to the predetermined path.

The present invention relates to a floor pit covering system comprising a cover plate (1) and a pivoting system (2). The pivoting system (2) is adapted for arranging the cover plate (1) in a first end position (P1) or in a second end position (P2) in response to an internal force (FI), or an internal force (FI) and an external force (FE), being applied onto the cover plate (1). The cover plate (1) is arranged in the first end position (P1) when force FE≤FI and in the second end position (P2) when force FE>FI. The present invention further relates to a method of operating such a system.