Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1986-03-18
1987-05-05
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181239, 181279, F01N 108
Patent
active
046624740
ABSTRACT:
A noise suppressor for a pneumatic tool characterized by a plurality of annular or spiral suppression grooves on the inner wall of the body of pneumatic tool and a plurality of air being holes at the bottom of the suppression grooves on a side wall so that compressed air discharged can have its flow disturbed by impingement upon the suppression grooves and side wall and thus the time of discharge is prolonged and the noise from discharge of the compressed air is suppressed.
REFERENCES:
patent: 3144913 (1964-08-01), Bailey
patent: 4367807 (1983-01-01), Fink et al.
patent: 4474260 (1984-10-01), Valentine
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