Breakaway utility pole shear base structure
First Claim
Patent Images
1. A breakaway utility pole mounting structure comprising:
- a utility pole having at least one substantially tubular end portion;
a base anchor in the ground substantially at ground level having a tubular portion extending vertically above ground level and adapted telescopically to enclose said pose end portion;
said base tubular portion having a circumferential shear groove therein adjacent its bottom end; and
bolt means spaced above said groove and passing through said base tubular portion and said pole end portion to secure said base tubular portion to said pole end portion;
said shear groove adapted to cause failure of the base when said pole is subjected to impact at a predetermined distance above the base from a vehicle of predetermined minimum weight moving horizontally at a predetermined minimum speed.
1 Assignment
0 Petitions
Accused Products
Abstract
A breakaway utility pole structure having a tubular base (11) anchored in the ground substantially at ground level and adapted to telescopically secure the bottom end portion of a pole (9), the base (11) having a circumferential shear groove (20) adjacent to its bottom end, and the base being secured in the base by adhesive material (12) and by bolts (21) spaced above the shear groove (20), the shear groove is adapted to cause failure of the base when the pole is subjected to horizontal impact at a predetermined distance above ground level from a vehicle of predetermined weight moving horizontally at a predetermined minimum speed.
-
Citations
14 Claims
-
1. A breakaway utility pole mounting structure comprising:
-
a utility pole having at least one substantially tubular end portion; a base anchor in the ground substantially at ground level having a tubular portion extending vertically above ground level and adapted telescopically to enclose said pose end portion; said base tubular portion having a circumferential shear groove therein adjacent its bottom end; and bolt means spaced above said groove and passing through said base tubular portion and said pole end portion to secure said base tubular portion to said pole end portion; said shear groove adapted to cause failure of the base when said pole is subjected to impact at a predetermined distance above the base from a vehicle of predetermined minimum weight moving horizontally at a predetermined minimum speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification