Extendible tool handle
US5285702A · kind A · utility
Inventor
Key dates
| Filing date | Nov 13, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Nov 13, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32524
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An extendible handle for a tool to permit the user to increase the leverage applied by the tool. The extendible handle assembly has an inner handle member with a bushing affixed to its outer end. An outer handle member slides over the inner handle member and the outer handle member is hollow and contacts the bushing at the end of the internal handle. A bushing is also affixed to the inner end of the outer handle so that the handle cannot extend past the bushing on the inner handle. An air tight rearward air chamber is positioned between the outer end of the outer handle and an airtight forward chamber is formed between the internal bushing and the tool and bushing. An air passageway is provided along the internal bushing so that as the outer handle is moved in or out, this movement is damped by the necessity of air having to pass through the air passage in the internal bushing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.