Abstract: Wheel chock restraint system comprising a wheel chock, a supporting element mounted on the ground in vicinity of a loading dock and a wheel chock support assembly connected by one end to the wheel chock and by another end in vicinity of the loading dock. A base portion of the chock is provided with first engagement elements and the supporting elements are provide with corresponding second engagement elements. The first engagement elements are adapted to cooperate with the second engagement elements, thus creating a retention force directed away from the loading dock and preventing the chock from sliding away from the wheel of a vehicle making an attempt to depart prematurely from the loading dock. Wheel chock support assembly is adapted to ensure a secure positioning of the chock under the wheel of the vehicle during loading and unloading operation by creating an engagement force directed towards the loading dock and pressing the chock against the wheel.

Abstract: A safety system for entering and exiting garage doors and entrances comprises a warning sign adapted to be placed by an attachment cable at a primary line of sight of a driver of a truck during lowering and raising movement of the door. A delay circuit is provided to facilitate a movement of the sign in such a manner that the sign will always appear first in the primary line of sight of the driver to eliminate a possibility of collision between the truck and the door. A moving mechanism is adapted to lower the sign into an operational position and provided to keep the sign in non-operational retracted position when the door is completely open to ensure clearance for moving truck. The warning sign is activated by a warning sign activating device such as a motor-driven assembly. The door is activated by a door detector adapted to transmit signal to a door control panel operating the movement of the door by a door motor.

Abstract: Safety system for entering and exiting garage doors and entrances comprises a warning sign adapted to be placed by an attachment means at a primary line of sight of a driver of a truck during lowering and raising movement of the door. A delay means are provided to facilitate a movement of the sign in such manner that the sign will always appear first in the primary line of sight of the driver to eliminate a possibility of collision between the truck and the door. A moving means are adapted to lower the sign into an operational position and provided to keep the sign in non-operational retracted position when the door is completely open to ensure clearance for moving truck. Warning sign is activated by a warning sign activating means such as a motor-driven assembly. The door is activated by a detector adapted to transmit signal to a door control panel operating the movement of the door by a door motor.