The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 1994
Filed:
Jan. 07, 1992
Ralph G Nasatka, Clinton, MD (US);
Other;
Abstract
A vehicle barrier for positioning on a roadway or the like includes a support plate adapted for placement across a roadway, a plurality of tread supports formed in series on the support plate with a space between adjacent tread supports, a rod having a row of spikes attached thereto and being rotatably disposed across the support plate so that the spikes are movably received between respective spaced tread supports, a tensioning device for maintaining the row of spikes in a first, upwardly extending position and a device for lowering the row of spikes into a second position between the space tread supports. With this vehicle barrier, a vehicle approaching the barrier from one direction can cause the row of spikes in the first position to rotate downwardly to the second position when its tires impact a spike. But, the row of spikes are maintained in their first upwardly extended position by the tensioning device when impacted by a vehicle approaching from an unauthorized direction thereby puncturing the tires of that vehicle.