On-grade barrier and method of its use
First Claim
1. An unobtrusive on-grade barrier for preventing access by unauthorized vehicular traffic, with at least a portion of said barrier located below grade, said barrier guiding below grade at least part of an unauthorized vehicle attempting to enter, comprising:
- a trench;
means for controlling said barrier proximal said trench;
means for impeding vehicular access in operable communication with said means for controlling, at least part of said means for impeding located in said trench;
means for permitting passage of an adult over said barrier under all modes of operation of said barrier; and
means for clearing impeded access, at least part of said means for clearing located in said trench.
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Accused Products
Abstract
Means and method for implementing an unobtrusive on-grade barrier. One embodiment employs a concrete-lined trench over which a biased hinged plate is affixed to an end wall. The biased hinge holds the free end of the plate against a tab affixed to the other end wall, assuring the plate does not rise above grade. The plate is supported for vehicle passage by a sliding mechanism energized by an actuator controlled by a controller that may be automated or operated by security personnel. The barrier may be configured so that vehicles may approach from either end. Upon authorizing access to the driver, the vehicle is permitted to pass over the supported plate. If the driver is not authorized access, the support is slid out of the way and any vehicle attempting to pass slides into the trench. Embodiments may include means for clearing the trench of a trapped vehicle
16 Citations
30 Claims
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1. An unobtrusive on-grade barrier for preventing access by unauthorized vehicular traffic, with at least a portion of said barrier located below grade, said barrier guiding below grade at least part of an unauthorized vehicle attempting to enter, comprising:
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a trench;
means for controlling said barrier proximal said trench;
means for impeding vehicular access in operable communication with said means for controlling, at least part of said means for impeding located in said trench;
means for permitting passage of an adult over said barrier under all modes of operation of said barrier; and
means for clearing impeded access, at least part of said means for clearing located in said trench. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 29, 30)
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21. A method for controlling access of vehicular traffic using a non-obtrusive on-grade system at least part of which is located below grade at an access point in a roadway, said method comprising:
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providing a trench at said access point;
providing means for controlling said barrier proximal said trench;
providing means for impeding vehicular access in operable communication with said means for controlling, at least part of said means for impeding located in said trench; and
providing means for clearing impeded access in operable communication with said means for controlling, at least part of said means for clearing located in said trench. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification