Percussion tool

Details Percussion tool Percussion tool

2005-06-21

2005-06-21

Gerrity, Stephen F. (Department: 3721)

Tool driving or impacting

Impacting devices

With means to reciprocate tool

C173S109000, C173S117000, C173S201000

Reexamination Certificate

active

06907942

ABSTRACT:
In a percussion tool such as an electric hammer or a hammer drill in which the axial direction of a motor8is substantially perpendicular to that of a tool bit1attached to a tool holder2, a motor housing3is made of a hard material such as aluminum, and a tail cover4is disposed on the lower end of the motor housing3, projections3aand3bwhich project beyond the tail cover4are disposed.

REFERENCES:
patent: 2348895 (1944-05-01), Gaudio
patent: 3161242 (1964-12-01), Etzkorn et al.
patent: 3876014 (1975-04-01), Moores, Jr.
patent: 4290492 (1981-09-01), Sides et al.
patent: 4582144 (1986-04-01), Mizutani
patent: 4766963 (1988-08-01), Hartwig et al.

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