Vehicular road block
OwnerW. Ross Rowlandinventor
Life of this patent
Estimating the term…
Abstract
A road block for preventing unauthorized vehicles from entering a secured area comprises a pit, a span covering the pit, collapsible support members supporting the span at the trailing end of the plate with respect to the direction of vehicle access, devices for collapsing the support members, and a triggering mechanism for actuating the collapsing devices in response to the approach of an unauthorized vehicle.
Claims18
A road block for preventing the entry of selected vehicles into a secured area via a road, comprising:
- a pit defined in part by a trailing wall on a trailing end of the pit with respect to the direction of vehicle access and a leading wall on a leading end of the pit, the pit having a width greater than the width of the selected vehicles;
- means for supporting vehicles above the pit at a level even with the surface of the road during normal operating conditions, the supporting means comprising a span of predetermined length and of width narrower than the width of the pit, an abutment support supporting the leading end of the span and at least one collapsible support member supporting the trailing end of the span;
- and
- means for effecting free fall of the vehicle supporting means into the pit by collapsing the support member in response to a selected vehicle approaching the pit, whereby the trailing end of the span falls into the pit, directing the vehicle toward impact against the trailing wall of the pit.
A road block for preventing the entry of selected vehicles into a secured area via a road, comprising:
- a pit defined in part by a trailing wall on a trailing end of the pit with respect to the direction of vehicle access and a leading wall on a leading end of the pit, the pit having a width greater than the width of the unauthorized vehicles;
- means for supporting vehicles above the pit at a level even with the surface of the road during normal operating conditions, the supporting means comprising a span of predetermined length and width narrower than the width of the pit, and supports supporting the span, said supports including at least one collapsible support member;
- camouflage means for rendering the road block undetectable by vision, and said camouflage means including said vehicle supporting means;
- and
- means for effecting free fall of the vehicle supporting means into the pit by collapsing the support member in response to a selected vehicle approaching the pit, whereby the trailing end of the span falls into the pit, directing the vehicle toward impact against the trailing wall of the pit.
A road block for preventing the entry of selected vehicles into a secured area via a road, comprising:
- a pit defined in part by a trailing wall on a trailing end of the pit with respect to the direction of vehicle access and a leading wall on a leading end of the pit, the pit having a width greater than the width of the unauthorized vehicles;
- means for supporting vehicles above the pit at a level even with the surface of the road during normal operating conditions, the supporting means comprising a span of predetermined length and a width narrower than the width of the pit, and supports supporting the span, said supports including at least one collapsible support member;
- means for effecting free fall of the vehicle supporting means into the pit by collapsing the support member in response to a selected vehicle approaching the pit, whereby the trailing end of the span falls into the pit, directing the vehicle toward impact against the trailing wall of the pit;
- and
- means, spaced from said pit, for actuating said free fall effecting means.
Dependencies are inferred from the claim text.