Impact tool

Details Impact tool Impact tool

2009-03-03

2011-12-06

Rada, Rinaldi I. (Department: 3721)

Tool driving or impacting

Impacting devices

Impact transmitting anvil

C173S093000, C173S093600, C173S104000, C173S109000, C173S217000, C173S048000, C081S463000, C081S464000

Reexamination Certificate

active

08069929

ABSTRACT:
An impact tool includes: a spindle disposed in a housing; an anvil disposed in front of the spindle and rotatably supported by the housing through a metal bearing, a rear surface of the anvil having a bearing hole in which a front end of the spindle is received; an impact mechanism configured to transmit a rotation of the spindle to the anvil; an outer groove formed on an outer periphery of the anvil and opposed to the metal bearing; and a connecting opening radially extending in the anvil and connecting the bearing hole and the outer groove to provide a communication therebetween. The outer groove is formed to have a depth in the range of 3-10% of an outer diameter of the anvil, and the connecting opening opens at a rear end of the outer groove in an axial direction of the anvil.

REFERENCES:
patent: 2341497 (1944-02-01), Amtsberg
patent: 3156334 (1964-11-01), Hoza
patent: 4002212 (1977-01-01), Schoeps
patent: 6725945 (2004-04-01), Sugimoto et al.
patent: 7124839 (2006-10-01), Furuta et al.
patent: 7207393 (2007-04-01), Clark et al.
patent: 7494437 (2009-02-01), Chen
patent: 2006/0254789 (2006-11-01), Murakami et al.
patent: A-2003-231067 (2003-08-01), None

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