Secondary physical/visual barrier
OwnerLouis Towleyinventor
Life of this patent
Estimating the term…
Abstract
A physical barrier system for barring entry for a vehicle having a clearance height through a door opening having a roll-up door has a physical barrier positionable in a first position visible to a driver of the vehicle and at least partially barring passage by the vehicle through the door opening, and in a second position not barring passage by the vehicle through the door opening, and a mechanism for moving the physical barrier from the first position to the second position. The system is characterized in that the mechanism for moving the physical barrier is initiated at a point at which the roll-up door has attained a height equal to or greater than the clearance height of the vehicle.
Claims8
A system for barring entry for a vehicle having a clearance height through a door opening having a roll-up door, comprising:
- a physical barrier positionable in a first position visible to a driver of the vehicle and at least partially barring passage by the vehicle through the door opening, and in a second position not barring passage by the vehicle through the door opening;
- and
- a linkage mechanism operable by the roll-up door and including a first engagement element for engaging a portion of the roll-up door when the roll-up door is moving from a closed position to an open position, providing a mechanical advantage for moving the physical barrier from the first position to the second position.
A method for indicating full opening of a roll-up door to a driver of a vehicle, comprising the steps of:
- (a) mounting a physical barrier positionable in a first position visible to the driver and at least partially barring passage by the vehicle, and in a second position not barring passage by the vehicle;
- and
- (b) coupling a linkage mechanism operable by the roll-up door and including a first engagement element for engaging a portion of the roll-up door, providing a mechanical advantage for moving the physical barrier from the first position to the second position to the physical barrier, in a manner that the mechanism is initiated to move the barrier from the first position to the second position at a point at which the roll-up door has attained a height equal to or greater than the clearance height of the vehicle.
Dependencies are inferred from the claim text.