Arrowhead extractor
US4920625A · kind A · utility
Inventor
Key dates
| Filing date | Dec 5, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Dec 5, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53883
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An arrowhead extractor apparatus for removal of an arrowhead embedded in a workpiece. The arrowhead extractor includes a threaded shaft with a threaded bore at a first end and a handle at a second end. A removable insert fits into the threaded bore. The removable insert includes a threaded bore for engaging the threaded shaft of an arrowhead. A sleeve is slideable along the shaft. The sleeve has a surface for engaging the workpiece and has a central opening through which the arrowhead can pass. An attachment is provided for adjusting the surface of the sleeve to conform to an uneven workpiece surface. A nut threadedly engages the threaded portion of the shaft. The nut engages the sleeve and moves the sleeve relative to the shaft in response to rotation of the nut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.