Arrangement for muffling the exhaust of a pneumatic rock drillin

Details Arrangement for muffling the exhaust of a pneumatic rock drillin Arrangement for muffling the exhaust of a pneumatic rock drillin

1974-12-02

1977-03-08

Tomsky, Stephen J.

Acoustics

Auditorium

173168, 173DIG2, F01N 306

Patent

active

040108198

ABSTRACT:
An elastomer muffler for the exhaust of a pneumatic percussive tool, which comprises an outer and an inner side wall. The cross-sections of the side walls are C-shaped and the side walls are longitudinally unified for forming a cavity therebetween. The muffler is detachably mounted to the tool by resilient snap action. To advantage, the muffler may be used in connection with a pusher leg arrangement for a rock drill. The muffler, then, is mounted on the pusher leg and the inlet mouth thereof is arranged substantially concentrically with the axis of the hinge connection between the pusher leg and the rock drill but spaced axially from said hinge connection. The exhaust port of the rock drill is also substantially concentrically with the hinge connection but spaced axially therefrom.

REFERENCES:
patent: 2152205 (1939-03-01), Morrison
patent: 3191692 (1965-06-01), Ekwall
patent: 3203489 (1965-08-01), Fuehrer
patent: 3224527 (1965-12-01), Waldron
patent: 3554316 (1971-01-01), Judd et al.
patent: 3815705 (1974-06-01), Bennett

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