The wheel chock includes a locking mechanism that can be held in a locked state when properly positioned on a base plate. The locking mechanism includes a positioning unit having at least one tooth provided to engage a side of a corresponding one of the blocking elements in a latched engagement when the positioning unit is in the fully locked position. The locking mechanism also includes an actuating device to move the positioning unit from the unlocked position towards the fully locked position, and a holding device to selectively hold the positioning unit in the fully locked position.

A wheel chock system having an automatically deployable wheel chock for preventing the movement of a vehicle wheel is disclosed herein. The system attaches to a semi-trailer or other vehicle, and may be powered by the existing air brake system of the vehicle. The system enables the wheel chock to descend from a stowed position to a deployed position, immediately in front of or behind the vehicle wheel and on the ground surface, or vice versa. The system may be further comprised of an actuation means in the cab of the vehicle for activating or deactivating the wheel chocks, a detection means for detecting whether the chocks are in a stowed or deployed position and a visual or audible indicator for alerting the user as to the positioning of the chock(s).

A wheel chock system having an automatically deployable wheel chock for preventing the movement of a vehicle wheel is disclosed herein. The system attaches to a semi-trailer or other vehicle, and may be powered by the existing air brake system of the vehicle. The system enables the wheel chock to descend from a stowed position to a deployed position, immediately in front of or behind the vehicle wheel and on the ground surface, or vice versa. The system may be further comprised of an actuation means in the cab of the vehicle for activating or deactivating the wheel chocks, a detection means for detecting whether the chocks are in a stowed or deployed position and a visual or audible indicator for alerting the user as to the positioning of the chock(s).

Disclosed herein is a wheel shield apparatus that includes a pair of elongated parallel tube members in perpendicular engagement with a pair of short parallel tube members, at least one removable side of the wheel shield apparatus is operable to be temporarily opened or removed such that the wheel shield apparatus may be placed around a wheel of a neurosurgical microscope or some other type of heavy wheeled machinery and the removable side may be placed in a closed position such that the wheel shield surrounds the wheel. Each of the pair of elongated parallel tube members and/or each of the pair of short parallel tube members comprises a cavity configured to receive a ballast material to provide sufficient weight to ensure that the wheel shield apparatus contacts the floor such that cables along the floor are pushed out of the way by the wheel shield apparatus and prevented from being run over while the machinery is being transported.

Disclosed herein is a wheel shield apparatus that includes a pair of elongated parallel tube members in perpendicular engagement with a pair of short parallel tube members, at least one removable side of the wheel shield apparatus is operable to be temporarily opened or removed such that the wheel shield apparatus may be placed around a wheel of a neurosurgical microscope or some other type of heavy wheeled machinery and the removable side may be placed in a closed position such that the wheel shield surrounds the wheel. Each of the pair of elongated parallel tube members and/or each of the pair of short parallel tube members comprises a cavity configured to receive a ballast material to provide sufficient weight to ensure that the wheel shield apparatus contacts the floor such that cables along the floor are pushed out of the way by the wheel shield apparatus and prevented from being run over while the machinery is being transported.

A wheel chock (40) has a profile that provides maximum restraining capacity when the wheel (22) is completely supported thereby, by mitigating undesirable failure modes while promoting the safest failure mode of operation, slipping on ground (30). The profile includes a generally flat bottom surface (46) for being in contact with a ground surface (30), a substantially broken top surface (44) for being in contact with the wheel (22), the top surface (44) including a first contact point (P1), a second contact point (P2), and a contact surface (52) there between allowing at most two points of contact at a time between the contact surface (52) and the wheel (22), with the second contact point (P2) being one of the two points of contact. A more specific clothoid profile of the contact surface (52) is preferred to minimize the rate of variation of the contact force of the wheel (22) with the chock (40).

A wheel chock (40) has a profile that provides maximum restraining capacity when the wheel (22) is completely supported thereby, by mitigating undesirable failure modes while promoting the safest failure mode of operation, slipping on ground (30). The profile includes a generally flat bottom surface (46) for being in contact with a ground surface (30), a substantially broken top surface (44) for being in contact with the wheel (22), the top surface (44) including a first contact point (P1), a second contact point (P2), and a contact surface (52) there between allowing at most two points of contact at a time between the contact surface (52) and the wheel (22), with the second contact point (P2) being one of the two points of contact. A more specific clothoid profile of the contact surface (52) is preferred to minimize the rate of variation of the contact force of the wheel (22) with the chock (40).

A wheel chocking assembly for a vehicle such as a truck where the wheel chocks are supported in respective cradles mounted for rotation on the truck's frame or chassis, and where the cradles are adapted to be moved between a first upwardly-facing inoperative position where each cradle supports its corresponding chock in an inoperative mode, and an operative positon where each cradle is rotated about 180° sufficient to lower its corresponding chock by a tether into chocking position under the influence of gravity. A control system is provided where transition from the aforementioned inoperative position to the operative position is remotely controlled by operation of the vehicle's parking brake.

A wheel chocking assembly for a vehicle such as a truck where the wheel chocks are supported in respective cradles mounted for rotation on the truck's frame or chassis, and where the cradles are adapted to be moved between a first upwardly-facing inoperative position where each cradle supports its corresponding chock in an inoperative mode, and an operative positon where each cradle is rotated about 180° sufficient to lower its corresponding chock by a tether into chocking position under the influence of gravity. A control system is provided where transition from the aforementioned inoperative position to the operative position is remotely controlled by operation of the vehicle's parking brake.

A levelling ramp assembly comprising: a ramp for supporting a wheel; the ramp having a ramp face with one or more ramp attachment elements located on the ramp face; at least one chock for engaging a wheel whilst on the ramp; the chock having a chock face with one or more chock attachment elements located on the chock face; wherein the ramp attachment elements and chock attachment elements engage to hold the ramp and the chock together.