Tool driving or impacting – Impacting devices – With impact cushioning means
Reexamination Certificate
2008-07-16
2010-10-05
Nash, Brian D (Department: 3721)
Tool driving or impacting
Impacting devices
With impact cushioning means
C173S162200, C173S047000, C173S048000, C173S211000
Reexamination Certificate
active
07806201
ABSTRACT:
It is an object of the invention to provide a technique that contributes to improvement of the vibration reducing performance of a dynamic vibration reducer in a power tool while realizing reduction in size of the dynamic vibration reducer. A representative power tool which linearly drives a tool bit to perform a predetermined operation on a workpiece includes a tool body and a dynamic vibration reducer. The dynamic vibration reducer has a weight and an elastic element. The weight has an internal space that extends in the axial direction of the tool bit from at least one end of the weight in said axial direction. One end of the elastic element is inserted and received in the internal space, while the other end of the elastic element is placed on the tool body directly or via the body side member.
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European Search Report issued Apr. 21, 2010 in European Patent Application No. 08 01 3032.
Makita Corporation
Nash Brian D
Oliff & Berridg,e PLC
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