Sound-proofing casing for a pneumatic percussive drill

Details Sound-proofing casing for a pneumatic percussive drill Sound-proofing casing for a pneumatic percussive drill

1984-11-02

1986-11-25

Kazenske, E. R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

173DIG2, F01N 108

Patent

active

046243399

ABSTRACT:
The internal absorbent layer (9) of the casing delimits an internal volume (10) around the drill (1), which volume is divided on either side of the exhaust orifice (3) by two transverse partitions (13A, 13B) into three successive expansion chambers (11A, 11B, 11C) between the exhaust orifice (3) and the outlet opening (12) to the air outside the casing.

REFERENCES:
patent: 2789653 (1957-04-01), Fannen
patent: 3255844 (1966-06-01), Wallace
patent: 3481411 (1969-12-01), Wood
patent: 3757875 (1973-09-01), Gunning
patent: 4113049 (1978-09-01), Lieber
patent: 4294330 (1981-10-01), Baldwin et al.
patent: 4327807 (1982-05-01), Emonet
patent: 4346783 (1982-08-01), Scarton et al.
patent: 4407390 (1983-10-01), LeBlanc, Jr.
Baumaschine und Bautechnik, vol. 12, No. 9, Sep. 1965, (Wiesbaden, DE) G. Garbotz, "Larmabwehr im Baubetrieb und bei Baumaschinen", pp. 421-423, p. 422, No. 7, p. 423, FIGS. 4, 5.

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