Hand-held pneumatic impact tool and method of controlling the sa

Details Hand-held pneumatic impact tool and method of controlling the sa Hand-held pneumatic impact tool and method of controlling the sa

2000-01-19

2000-08-01

Smith, Scott A.

Tool driving or impacting

Impacting devices

Length of cyclic travel of hammer head selectively adjustable

173122, 173132, 173200, B25D 914

Patent

active

060952563

ABSTRACT:
A hand-held pneumatic impact tool and method of controlling the same for use in fine hand working operations includes a handpiece, a foot-operated flow control valve and a hand operated flow control needle valve. The handpiece includes a housing having a cavity and annular shoulder accommodating a stepped piston dividing the cavity into three chambers. The design provides a means to oscillate a piston without delivering impacts and to oscillate the piston with varying amounts of impact energy.

REFERENCES:
patent: 3111997 (1963-11-01), Kremel, Jr.
patent: 3393755 (1968-07-01), Glaser et al.
patent: 3747692 (1973-07-01), Davidson
patent: 4694912 (1987-09-01), Glaser
patent: 4903784 (1990-02-01), Glaser
patent: 5203417 (1993-04-01), Glaser
patent: 5515930 (1996-05-01), Glaser

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