Compressed fluid operated tool with fluid metering device
US5573073A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1995 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Jan 9, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D9/26
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A vibration dampened percussive tool has a handle assembly and a cover surrounding a barrel and piston assembly which are caused to oscillate relatively to the handle assembly. The barrel assembly receives a tool retainer and a trigger controls primary air supply. To reduce air consumption when the tool is not actually applied to a workpiece and thereby to reduce exposure of the operator's hand/arm to vibration, an air metering device is provided, which includes a tube slidably mounted in a bush and having a bleed hole in an end of the tube which enters the bush. In one position of the tube within the bush, apertures in the tube are sealed to allow the tool idle and in another position of the tube the apertures are exposed. The tube connects the air line with the piston assembly and moves within the bush responsive to pressure applied by the actual tool on the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.