A displacement arrangement for use in a combination dolly-pallet includes an impelling member movable between first and second positions. A linkage is pivotally connected to the impelling member. When the impelling member moves between the first and second positions, the linkage moves pivotally relative to the impelling member to an extended position.

A self-locking anti-slip rail braking device is provided. The rail braking device includes a ladder-shaped support, a lifting unit, a roller-and-wedge plate mechanism, a roller support, and a rail clamping unit. The ladder-shaped support is connected under a surface of a balance beam of a port facility, and is connected at a middle part thereof with the lifting unit. A lower end of the lifting unit is hinged to two sides of the roller support. The roller support is provided on an upper end surface thereof with the roller-and-wedge plate mechanism, and is provided at a middle part thereof with the rail clamping unit. An upper end of the rail clamping unit serves as a force application end and is configured to match the roller-and-wedge plate mechanism, and a lower end of the rail clamping unit serves as a rail clamping end corresponding to two lateral sides of a rail.

A retracting rail clamp for braking or anchoring a rail-mounted machine such as a crane by clamping opposite sides of a longitudinal rail member, the retracting rail clamp comprising: a load transfer frame rigidly secured to the crane, such as by bolting; and a clamp mechanism suspended within the load transfer frame by at least one lateral pair of pivotally mounted lift levers, and operable through a first and second stage of motion between a raised, brake release position, in which the entirety of the rail clamp is disposed substantially vertically clear of the rail, and a lowered, brake set position wherein at least one opposed facing pair of main levers of the clamp mechanism engage the side surfaces of the rail.

A mobile imaging device includes a base having at least one caster, a first drive mechanism that moves the system in a transport mode and translates an imaging component relative to the base in a scan mode, and a second drive mechanism that extends caster relative to the base to raise the base off the ground in the transport mode, and retracts the caster relative to the base to lower the base to the ground in the scan mode. A caster system for a mobile apparatus includes a base containing a housing and a caster, attached to the base, the caster having a wheel defining a wheel axis and a swivel joint defining a swivel axis and a pivot point defining a pivot axis, wherein the caster pivots on the pivot axis as the caster is retracted into the housing and extended out of the housing.

A mobile imaging device includes a base having at least one caster, a first drive mechanism that moves the system in a transport mode and translates an imaging component relative to the base in a scan mode, and a second drive mechanism that extends caster relative to the base to raise the base off the ground in the transport mode, and retracts the caster relative to the base to lower the base to the ground in the scan mode. A caster system for a mobile apparatus includes a base containing a housing and a caster, attached to the base, the caster having a wheel defining a wheel axis and a swivel joint defining a swivel axis and a pivot point defining a pivot axis, wherein the caster pivots on the pivot axis as the caster is retracted into the housing and extended out of the housing.

A method is disclosed for slowing a transfer trailer that is used for transporting heavy work machines on a sloping base, the transfer trailer having a chassis with axles and wheels mounted on the axles. The transfer trailer is towable by a transfer vehicle. The method includes the steps of providing the transfer trailer with a brake mounted on the chassis and an operating device, the brake having a brake surface operable to press directly on the base for continuous dragging against the base, operating the operating device to allow pressure to be applied to the brake surface to press directly on the base for continuous dragging against the base to slow the transfer trailer, and measuring at least one control variable relating to the control of the speed of the transfer trailer during the braking and obtaining measurement data.

A method is disclosed for slowing a transfer trailer that is used for transporting heavy work machines on a sloping base, the transfer trailer having a chassis with axles and wheels mounted on the axles. The transfer trailer is towable by a transfer vehicle. The method includes the steps of providing the transfer trailer with a brake mounted on the chassis and an operating device, the brake having a brake surface operable to press directly on the base for continuous dragging against the base, operating the operating device to allow pressure to be applied to the brake surface to press directly on the base for continuous dragging against the base to slow the transfer trailer, and measuring at least one control variable relating to the control of the speed of the transfer trailer during the braking and obtaining measurement data.

A rapid deceleration mechanism for a vehicle is provided herein. The rapid deceleration mechanism decelerates a body of the vehicle traveling on a road surface. The rapid deceleration mechanism includes at least one bollard attached to the body and at least one energetics arrangement. The at least one energetics arrangement propels the at least one bollard from the body toward the road surface to decelerate the body such that at least one of a portion of the body or the at least one bollard is deformed.

A rapid deceleration mechanism for a vehicle is provided herein. The rapid deceleration mechanism decelerates a body of the vehicle traveling on a road surface. The rapid deceleration mechanism includes at least one bollard attached to the body and at least one energetics arrangement. The at least one energetics arrangement propels the at least one bollard from the body toward the road surface to decelerate the body such that at least one of a portion of the body or the at least one bollard is deformed.

A parking brake used on the tongue jack wheel of a boat trailer to keep the boat trailer from moving is disclosed. The parking brake attaches to a trailer tongue jack wheel assembly that is standard on most boat trailers. The disclosed brake replaces chock blocks so those do not have to be transported with the trailer.