A passage barrier includes two guide elements that cooperate such that they define a gate region, through which a person passes from an entrance region into a passage region. The passage barrier has a drive with a drive unit and an output unit. The drive unit, output unit, and barrier element are operatively connected such that the barrier element is movable via the drive unit into a position closing and a position opening the gate region. The output unit has a hollow shaft with outer and inner shell surfaces. The inner shell surface and drive unit are configured such that the inner shell surface surrounds the drive unit in sections, preferably completely and the hollow shaft has a barrier element mount formed for fixing a barrier element on the hollow shaft. The barrier element mount is arranged on the outer shell surface and formed integrally with the hollow shaft.

A collection tank for a mobile vacuum excavator includes a front with a closed end, a rear with an open end, a door configured to be closed over the open end, and a linkage assembly having a first end attached to the door and a second end attached to the body. A first pivotal movement drives the first end and second end away from each other, and a second pivotal movement moves the first end and the second end toward each other. An actuator is attached to the first arm and to the second arm so that actuation of the actuator in a first direction drives the first pivotal movement and actuation of the actuator in a second direction drives the second arm the second pivotal movement.

A collection tank for a mobile vacuum excavator includes a front with a closed end, a rear with an open end, a door configured to be closed over the open end, and a linkage assembly having a first end attached to the door and a second end attached to the body. A first pivotal movement drives the first end and second end away from each other, and a second pivotal movement moves the first end and the second end toward each other. An actuator is attached to the first arm and to the second arm so that actuation of the actuator in a first direction drives the first pivotal movement and actuation of the actuator in a second direction drives the second arm the second pivotal movement.

The present disclosure relates to a vehicle carrier box having a lid and a base. The carrier box has first and second longitudinal sides and first and second transverse sides. The lid and the base are connected by a first and a second lid lifter, the first lid lifter being arranged at the first transverse side and the second lid lifter being arranged at the second transverse side. Moreover, the first lid lifter includes a first pivotable link arm connecting the lid to the base, and the second lid lifter comprises a second pivotable link arm connecting the lid to the base, the first and second lid lifters furthermore including an equalization arrangement for equalization of the forces exerted by the first and second lid lifters on the lid upon opening of the lid.

The present disclosure relates to a vehicle carrier box having a lid and a base. The carrier box has first and second longitudinal sides and first and second transverse sides. The lid and the base are connected by a first and a second lid lifter, the first lid lifter being arranged at the first transverse side and the second lid lifter being arranged at the second transverse side. Moreover, the first lid lifter includes a first pivotable link arm connecting the lid to the base, and the second lid lifter comprises a second pivotable link arm connecting the lid to the base, the first and second lid lifters furthermore including an equalization arrangement for equalization of the forces exerted by the first and second lid lifters on the lid upon opening of the lid.

An overhead door and frame has a horizontal header connected to tripod legs with splice assemblies. Each tripod leg has two upright columns connected to an upright I-bar. The splice assemblies connect the upright columns to the header. Hinges pivotally mount an overhead door to the header to allow hydraulic cylinders to selectively move the overhead door to an open position and a closed position.

An overhead door and frame has a horizontal header connected to tripod legs with splice assemblies. Each tripod leg has two upright columns connected to an upright I-bar. The splice assemblies connect the upright columns to the header. Hinges pivotally mount an overhead door to the header to allow hydraulic cylinders to selectively move the overhead door to an open position and a closed position.

Disclosed herein is an apparatus for variable fluid damping. The apparatus comprises a mount. The apparatus also comprises a damper coupled to the mount to apply a damping force in response to movement of the mount. The apparatus further comprises an electrical element positioned to correspond to the damper. The apparatus additionally comprises a rheological fluid disposed in the damper. The rheological fluid changes viscosity in response to a change in an output of the electrical element to change the damping force of the damper. The apparatus also comprises a controller to provide input to the electrical element in response to a normal operating condition or an emergency operating condition.

Disclosed herein is an apparatus for variable fluid damping. The apparatus comprises a mount. The apparatus also comprises a damper coupled to the mount to apply a damping force in response to movement of the mount. The apparatus further comprises an electrical element positioned to correspond to the damper. The apparatus additionally comprises a rheological fluid disposed in the damper. The rheological fluid changes viscosity in response to a change in an output of the electrical element to change the damping force of the damper. The apparatus also comprises a controller to provide input to the electrical element in response to a normal operating condition or an emergency operating condition.

Described and illustrated is a regulating valve for a door drive, wherein the regulating valve has an axis of rotation, wherein the regulating valve includes at least two ends and at least two sealing sections, wherein the regulating valve includes a regulating section, and the regulating section is disposed between the sealing sections. A regulating valve for a door drive, which is particularly simply manufacturable, is realized in that at least one radial thickening forms at least one of the sealing sections, wherein at least one radial tapering of the regulating valve forms the regulating section.