CPC E01F 9/685 (2016.02) [B60W 60/0015 (2020.02); E01F 9/631 (2016.02); E01F 15/0461 (2013.01); E02D 27/42 (2013.01); E04H 12/2223 (2013.01); G06V 20/56 (2022.01); B60W 2554/4044 (2020.02); B60W 2554/4049 (2020.02); E02D 2200/1685 (2013.01); E02D 2300/0029 (2013.01); E02D 2300/0032 (2013.01)] | 15 Claims |
1. A post foundation system, comprising:
a shaft having a first and a second end;
a helical disk affixed to the first end of the shaft;
a sign post slip joint base affixed to the second end of the shaft having an opening for receiving a sign post within the shaft;
a movable sleeve carried by the shaft between the second end of the shaft and the helical disk, and,
at least one fin carried by the sleeve.
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