The present disclosure is directed to overhead doors and overhead door operation. More specifically, the present disclosure relates to a direct drive counter balancing system for operating overhead doors. In some examples, the direct drive counter balancing system of the present disclosure is for overhead door systems used in segmented door arrangements for box trucks.

A friction hinge for outward opening top hung windows comprising a support guide of C-shaped section, a moving lever, intermediate levers, a sliding block mounted so that it is capable to slide in the support guide, which are pivotally connected to each other and provide opening of the movable lever in its plane, wherein its rotation axis simultaneously slides along the guide and moves away from it in the opening direction.

Provided are a cab for a work machine and a work machine capable of preventing a door from opening against an operator's intention. The cab includes a cab body, a door, and a gas spring. The cab body is formed with a doorway. The door is rotatably supported on the cab body. The door opens and closes the doorway. The gas spring biases the door in the closing direction.

The present invention is concerned with vertically sliding facade components. In order to improve operability and user comfort for vertically displaceable facade components, a weight compensation device (10) for vertically displaceable facade components comprises a spring element (12) for at least partial compensation of its own weight of a vertically displaceable facade component and a compensator (14). The spring element provides a spring force as a driving force (F.sub.AN) for lifting the vertically displaceable facade component. The spring element is movable between a compressed state (P.sub.K) and an expanded state (P.sub.E). The spring force has a decreasing value when moving from the compressed state to the expanded state. The compensator at least partially compensates for the decrease in the input force and provides an output force (F.sub.AB) that decreases less than the input force.

An actuation system for facilitating opening and closing of a closure panel of a vehicle via a hinge, the actuation system comprising: a pop up safety system mounted to a body of the vehicle adjacent to the hinge, the pop up safety system including a bracket connected to the closure panel; and a coupling mechanism coupling the hinge to the body in order to facilitate moving the closure panel from a closed hinge position to an open hinge position, such that the bracket is also connected to the coupling mechanism; wherein when the pop up safety system is operated, the bracket is decoupled from the coupling mechanism in order to facilitate movement of the closure panel away from the coupling mechanism.

A spindle drive for a closure element of a motor vehicle. The spindle drive including a drive unit and a spindle-spindle nut transmission and including a spindle and a spindle unit for generating drive movements. The spindle drive including first and second drive sections, including first and second drive connections and configured to move relative to another between a retracted state and mi extended state over an adjustment path along a longitudinal axis of the drive unit. The spindle disposed in the second drive section and is axially fixed relative to the first drive connection, and the spindle nut is disposed in the first drive section and is axially fixed relative to the second drive connection. The spindle drive includes a support sleeve radially surrounding the spindle nut in the extended state and is mounted such that the spindle nut is axially moved relative to the two drive connections.

The present disclosure is directed to overhead door assemblies and operating systems. Disclosed herein is a drive drum that is compatible across a variety of overhead door types, including, for example, standard lift doors, vertical lift doors, and high lift doors. The drive drum of the present disclosure comprises a first cable groove section and a second cable groove section, opposite the first cable groove section, wherein at least one of the first cable groove section or the second cable groove section is in a non-linear graduated arrangement.

The present disclosure is directed to overhead door assemblies and operating systems. Disclosed herein is a drive drum that is compatible across a variety of overhead door types, including, for example, standard lift doors, vertical lift doors, and high lift doors. The drive drum of the present disclosure comprises a first cable groove section and a second cable groove section, opposite the first cable groove section, wherein at least one of the first cable groove section or the second cable groove section is in a non-linear graduated arrangement.

A dual lower rail structure for opposite sliding doors is provided. The dual lower rail structure includes a first lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a second lower rail mounted in a longitudinal direction on a vehicle body at one side of the first lower rail, a first lower rail roller unit rollably connected to the first lower rail, a second lower rail roller unit having one end rollably connected to the second lower rail, and the other end connected to a sliding door, and a lower rail swing arm rotatably connected to the first lower rail roller unit and the sliding door.

A gate opening and closing assistance device for a vehicle includes: a gas lifter including a cylinder filled with a compressible material, and a cylinder rod inserted into the cylinder to slide relative to the cylinder by compression or expansion of the compressible material; an inner housing which extends in a direction in which the cylinder rod extends, has one end coupled to one end of the cylinder rod to be slid together according to the sliding of the cylinder rod, and has an inner circumferential surface in contact with the cylinder while surrounding the gas lifter from the outside; and an outer housing which extends in a direction in which the cylinder extends, has a first end coupled to one end of the cylinder, has a second end through which the inner housing inserted, and surrounds a portion or the whole of the inner housing.