초록 ▼

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

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.

대표청구항 ▼

A power tool comprising: a portion subject to vibration in a direction generally transverse to an axis during operation of said power tool; and handle means, adapted to be grasped by an operator of said power tool, for supporting and controlling the motion of said power tool, said handle means inclu

A power tool comprising: a portion subject to vibration in a direction generally transverse to an axis during operation of said power tool; and handle means, adapted to be grasped by an operator of said power tool, for supporting and controlling the motion of said power tool, said handle means including: cantilever spring means for receiving and absorbing vibration, said cantilever spring means having first and second longitudinally spaced connection areas and an intermediate portion extending between said connection areas, means for securing said first connection area of said cantilever spring means to said portion of said power tool in a manner such that the balance of said cantilever spring means, including said intermediate portion and second connection area thereof, is isolated from and cantilevered with respect to said portion of said power tool, said intermediate portion of said cantilever spring means extends generally parallel to said axis, and said portion of said power tool defines a stop for limiting lateral flexure of said cantilever spring means, a handgrip adapted to be grasped by an operator of said power tool, and means for securing said handgrip to said second connection area of said cantilever spring means.