Tool for extracting the remnants of sign posts and method for using the same
US6883781B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 13, 2002 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Mar 28, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53843
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The tool is adapted for extracting the sheared remnant of a sign post having holes and comprises a shaft having a top and bottom end. To secure the tool to the remnant a clamp is provided comprising a stationary member integral to the bottom end of the shaft and a moveable member pivotally connected to the stationary member. Fixed to the stationary member is a guide member having a plurality of outwardly projecting pins. The pins have a diameter and spaced relationship adapted to correspond to the diameter and spaced relationship of the holes in the sign post remnant. When the clamp is inserted into the sign post remnant the pins will enter and tightly engage the holes in the signpost remnant. Connected to the top end of the shaft is a sliding hammer for imparting extraction forces to the sheared sign post remnant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.