Rock drilling machine

Details Rock drilling machine Rock drilling machine

2005-03-01

2005-03-01

Gerrity, Stephen F. (Department: 3721)

Tool driving or impacting

Impacting devices

With means for rotating tool

C173S128000, C173S171000, C173S206000

Reexamination Certificate

active

06860340

ABSTRACT:
A rock drilling machine has a housing (1), a hammer piston (2) movable to-and-fro in the housing, a drilling tool (3), and a guide (4) for the drilling tool. The guide (4) consists at the surface against the drilling tool (3) of polyethyleneterephthalate.

REFERENCES:
patent: 3666022 (1972-05-01), Bailey et al.
patent: 5155539 (1992-10-01), Yamaguchi et al.
patent: 5542479 (1996-08-01), Stachler et al.
patent: 5810776 (1998-09-01), Bacich et al.
patent: 6109620 (2000-08-01), Roberts et al.
patent: 19638464 (1998-03-01), None
patent: 0198809 (1988-10-01), None
patent: 904891 (1999-03-01), None

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