Tool driving or impacting – Impacting devices – Hammer head constitutes piston of drive motor
Patent
1986-03-12
1988-04-26
Kazenske, E. R.
Tool driving or impacting
Impacting devices
Hammer head constitutes piston of drive motor
173DIG2, 181230, 181254, B25D 1712
Patent
active
047398370
ABSTRACT:
A pneumatic impact tool comprising a casing having an interior space in which is mounted a piston for reciprocations under the action of compressed air for delivering useful blows, and ports of at least two exhaust passages opening into the interior space, one of the exhaust passages permanently communicating with atmosphere and the other with a chamber for preliminarily reducing the exhaust pressure. The chamber for preliminarily reducing the exhaust pressure is permanently connected through at least one passage to the exhaust passage communicating with atmosphere.
REFERENCES:
patent: 3223181 (1965-12-01), Price
patent: 3554316 (1971-01-01), Judd
patent: 3635299 (1972-01-01), Hayes
patent: 4189971 (1980-02-01), Gunning
Goldshtein Boris G.
Klushin Nikolai A.
Kokarev Vladimir I.
Maslakov Petr A.
Nikolaev Igor V.
Kazenske E. R.
Phan Hien H.
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