Impact wrench with a lubricated impact mechanism

Details Impact wrench with a lubricated impact mechanism Impact wrench with a lubricated impact mechanism

2011-05-10

2011-05-10

Nash, Brian D (Department: 3721)

Tool driving or impacting

Impacting devices

With anvil arranged to transmit torsional impact to tool

C173S048000, C173S132000, C173S093000, C173S117000

Reexamination Certificate

active

07938195

ABSTRACT:
An impact wrench includes a housing, a rotation motor, an output shaft, and an impact mechanism including an inertia drive member with an impact chamber, a drive socket coupling the drive member to the motor, and anvil formed integral with an output shaft and extending into the impact chamber, and a coupling member arranged to transfer kinetic energy from the drive member to the anvil, a lubricant provided in the impact chamber, and barrier forming cover element mounted on the drive member to seal off the impact chamber and prevent lubricant from being expelled from the impact chamber at rotation of the drive member.

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Extended European Search Report dated Feb. 4, 2010 (5 pages), issued in counterpart European Application No. 07835090.7.

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