Collision safety device having a breakaway shear coupling

Details Collision safety device having a breakaway shear coupling Collision safety device having a breakaway shear coupling

2006-06-06

2006-06-06

Will, Thomas B. (Department: 3671)

Road structure, process, or apparatus

Traffic director

Yielding

C403S002000, C248S548000, C248S909000

Reexamination Certificate

active

07056056

ABSTRACT:
A collision safety device having a breakaway coupling. The collision safety device comprises first and second post segments. A first shear plate is attached to the first post segment and a second shear plate is attached to the second post segment. The first shear plate has a first contact surface and the second shear plate has a second contact surface opposite the first contact surface. The first and second shear plates are releasably attached by a breakaway coupling including a band. Friction between the shear plates and strength of the band are adjustable such that the upper post is released from the lower post when subjected to a pre-selected collision force.

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