Safety lever for portable power tool
US4683682A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1986 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Sep 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S408/71
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A powered hand tool as a housing containing an air pressure driven motor with an output spindle extending from a work side of the housing and a work device such as a grinding wheel mounted thereon. A guard is mounted with the work side of the housing and at least partially surrounds the work device or grinding wheel. A handle mounted with the housing is provided for an operator to hold the tool. An air pressure flow control valve is mounted in the handle and includes a valve actuator member extending from the handle. An actuating lever is secured to the housing by a removable lever mount located in a locking groove in the housing and held in place by a portion of the guard. With the guard in place the actuating lever mount is positioned for hand actuation upon grasping the handle. Removal of the guard from the housing releases the lever mount and disables the tool by allowing the lever mount to slide freely from the locking groove thus removing the actuating lever from the tool and discouraging unsafe operation of the powered hand tool with the work device guard removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.