Internal thread cleaner and restorer
US4121486A · kind A · utility
Inventor
Key dates
| Filing date | Aug 8, 1977 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Aug 8, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/9048
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Thread restoring tool which is simple, accurate and inexpensive for cleaning and restoring defective internal threads of pipe connecting members. The tool comprises a pair of levers pivotally mounted to a cross link at approximately the midpoint of the levers and thread cutting dies mounted at the outer terminal ends of the levers remote from the hand grip portions of the levers. The hand grips are initially spread apart to position the cutting dies together to permit positioning internally of the female threads of a connecting member. The hand grips are then closed to seat the cutting dies and permit tracking in the threads. Application of hand pressure and rotation of the tool causes a cutting action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.