Patent ID: 11866894
Assignee: GREGORY ENTERPRISES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E  B  G | IPC B  E  G

Claim 13:
14. A post foundation system, comprising:
a tubular shaft having a first and a second end;
a helical disk affixed to the first end of the shaft;
a retainer ring affixed to the shaft, the retainer ring affixed to the shaft is closer to the second end of the shaft than it is to the first end of the shaft;
a sign post slip joint base affixed to the second end of the shaft, the sign post slip joint base having an opening for receiving a sign post within the shaft;
a rotatable sleeve carried by the shaft between the retainer ring and the first end of the shaft, the retainer ring retains the rotatable sleeve at a predetermined longitudinal position from the second end of the shaft, wherein the tubular shaft will rotate within the rotatable sleeve when the sleeve is held stationary, and,
at least one fin carried by the sleeve.