Hand-held pneumatic impact tool and method of controlling the same
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United States of America Patent
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Aug 1, 2000
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N/A
app pub date -
Jan 19, 2000
filing date -
Jan 19, 2000
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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.
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