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:
Jun. 19, 1990
Filed:
Mar. 31, 1989
Owen S Denman, Roseville, CA (US);
William G Krage, Fair Oaks, CA (US);
Energy Absorption Systems, Inc., Chicago, IL (US);
Abstract
An array of inertial barriers positioned on a support surface alongside a vehicle roadway includes a number of separate containers, each having an outer wall and a lower portion. An inner core is positioned within each container to define an annular space between the core and the respective outer wall. This annular space defines an average inner diameter which is at least about 20% of the average outer diameter of the annular space. A dispersible material such as sand is disposed in the annular spaces such that no more than 10% of the mass of sand in any container of the array extends in an uninterrupted disc across the respective container.