Method of forming shear sections in posts

Details Method of forming shear sections in posts Method of forming shear sections in posts

1975-06-23

1976-08-03

Lanham, C.W.

Metal working

Method of mechanical manufacture

Converting

40125N, 40145R, 52 98, 116 63R, 404 6, 404 9, 225 2, G09F 700

Patent

active

039721078

ABSTRACT:
Posts such as highway signs or reflector posts, exposed to impact by oncoming vehicles, are first anchored in the ground and then formed with a weakened fracture zone or shear section immediately above ground level by use of a pliers-type tool locked around the post and slidably mounting a punch which when struck by a hammer will pierce the post. The tool is positioned on the post to form the pierced hole facing the direction of oncoming traffic so that the post will break at ground level without leaving an upstanding segment when impacted by a vehicle. The invention includes the reuse of the post after it is broken off at ground level by driving the broken end of the post into the ground and then again using the tool to punch a hole in the post at the new ground level of the post.

REFERENCES:
patent: 1180357 (1916-04-01), Whitney
patent: 1337947 (1920-04-01), O'Toole
patent: 2630174 (1953-03-01), Poteet
patent: 3308584 (1967-03-01), Graham
patent: 3504460 (1970-04-01), Solberg
patent: 3515326 (1970-06-01), Saito et al.
patent: 3777399 (1973-12-01), Rockel

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