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US 4,289,301 AGranted
Post for a guard rail
AssigneeNippon Light Metal Company, Ltd.
InventorsNoboru Akabame, Hitoshi Yoshino
Life of this patent
Estimating the term…
Abstract
A post for a guard rail used on a highway. Said post is made of an aluminum cast alloy, and is formed in an I-shape in a horizontal cross section, having a central web and front and rear flanges, and being wider at its lower portion. A mechanical neutral plane of the post along the widthwise direction thereof is formed in an S-shape, so as to provide sufficient plasticity and supporting ability to absorb an impact load of a vehicle and to protect a driver from injury.
Claims15
A post for a guard rail to be secured on a curb arranged at a side of a highway, said post comprising:
- a post body formed of metal and having an I-shape in horizontal cross-section with a front flange and a rear flange formed on the front and rear portions of a web;
- at least one fitting portion on said front flange facing the highway for receiving said guard rail;
- said post having a mechanical neutral plane which is an S-shaped curve;
- and
- a first portion of the mechanical neutral plane of substantially the upper half portion of said post body being upwardly inclined towards the highway, and a second portion of the mechanical neutral plane of substantially the lower half portion of said post body having a curved plane protruding towards the highway.
2 more elements
Dependencies are inferred from the claim text.