Tool for removing and tightening screw-on drains
US7024972B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2004 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Sep 3, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53683
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Disclosed is a tool for both removing and tightening screw-on drains that is simple and easy to use, has a simple design and is easy to manufacture. The tool is capable of engaging an inner surface of a drain flange in a manner that is sufficient to transfer enough force to remove screw-on drain flanges and is capable of use with various designs and sizes of screw-on drain flanges. Different size cams and different lever arms used on the cams allow the tool to optimize the radial force to torque ratio for both removal and insertion of screw-on drain flanges. In addition, nubs are used at the bottom of the drain flange to engage arms that typically are used on drain flanges to further add to the resistance that can be provided between the tool and the drain flange and distribute forces in a dynamic, instantaneous and automatic fashion to optimize removal of the drain flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.