3552698 is referenced by 21 patents and cites 6 patents.

A pole-supporting member, a fixed foundation, and coupling means connecting said member to said foundation with a controlled force and in such a manner that, when subjected to horizontal impact of a given value, the pole is automatically disengaged from the coupling and is free to move in the direction of the impact.

Title
Break-away coupling for poles
Application Number
04/737,988
Publication Number
3552698
Application Date
June 18, 1968
Publication Date
January 5, 1971
Inventor
Kinney Robert E
Assignee
W F Keegan & Company
IPC
F16m 13/00
E01F 09/11
E01F 09/18
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