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On-grade barrier and method of its use

  • US 20070177940A1
  • Filed: 03/27/2007
  • Published: 08/02/2007
  • Est. Priority Date: 11/03/2004
  • Status: Abandoned Application
First Claim
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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:

  • 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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