Vibration-damping control handle for a portable power tool
US4825548A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1987 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Mar 31, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S30/05
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A vibration-damping control handle connectble to the shaft portion of a portable power tool, such as a flexible line trimmer or the like, has an elongated, generally tubular vibration isolation section which coaxially circumscribes the shaft. A first end portion of the vibration isolation section is clmaped to the shaft so that the balance of the section is cantilevered relative to the shaft and defines therewith an annular clearance space. The inner end of a handgrip connecting section is secured to a second end portion of the vibration isolation section, the connecting section projecting laterally outwardly from the vibration isolation section and having an operator handgrip secured to its outer end. During operation of the tool, transverse shaft vibration is absorbed by the vibration isolation section to thereby isolate the handgrip from a substantial portion of such vibration. The vibration isolation section also functions as a cantilevered spring element which may be laterally flexed into engagement with the shaft to exert a stronger lateral control force on the shaft, the shaft acting as a stop to limit such lateral flexure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.