Breakaway sign post coupling

Details Breakaway sign post coupling Breakaway sign post coupling

1989-02-10

1990-05-22

Murtagh, John E.

Static structures (e.g., buildings)

Frangible section or means

403 2, 256 131, 256 65, 40607, E02D 2742, F16D 100

Patent

active

049265920

ABSTRACT:
A breakaway coupling to be interposed between a ground mounting post and a support post carrying a highway sign, barricade or similar highway appurtenance. The coupling has a horizontal plate on a pedestal which attaches to the mounting post and a horizontal plate on a support post mounting member which attaches to the support post. Bolts normally holding the plates together release upon vehicular impact. Use of a novel plate configuration, a gasket and roller cams enhance the structure.

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patent: 4638608 (1987-01-01), Coy
patent: 4737048 (1988-04-01), Herrstrom
patent: 4793111 (1988-12-01), Shewchuk

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