Internal finishing tool and method of making same
US5404681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1991 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Aug 29, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24D13/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A twisted stem helical internal abrading and finishing tool is formed from abrasive containing plastic strips having transverse offset slits along the lateral edges and a longitudinal middle unslit portion. The strips may be stacked with the longitudinal middle unslit portions aligned with the longitudinal axis of a cotter pin, one end of the stack being placed in the bight of the cotter pin. The cotter pin is twisted about its longitudinal axis to form a helical twisted stem from which the slit lateral side or edges extend forming rectangular abrasive fingers uniformly helically arranged. The end of the cotter pin opposite the bight may be inserted into the chuck of a drilling or turning machine to hold and rotate the tool about the axis of the stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.