Sound muffling baffle for drainage device

Details Sound muffling baffle for drainage device Sound muffling baffle for drainage device

1979-01-22

1981-03-31

Miller, Jr., George H.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

128276, A61M 100, G10K 1100

Patent

active

042588243

ABSTRACT:
A drainage device is provided for draining fluid from a body cavity and for use with a vacuum. The drainage device has three chambers, a collection chamber, a water seal chamber and a pressure regulating manometer chamber. In operation, air bubbles passing through a body of liquid in the manometer chamber produces a disturbing sound. The present invention provides a sound muffling baffle plate including a plurality of fine apertures which is disposed in the lower end portion of the large arm of the manometer chamber, which prevents the formation of large air bubbles and effectively muffles the sounds emanating from the device during use.

REFERENCES:
patent: 2169359 (1939-08-01), Jones et al.
patent: 2485908 (1949-10-01), Morrow
patent: 3363626 (1968-01-01), Bidwell et al.
patent: 3474782 (1969-10-01), Cupp
patent: 3559647 (1971-02-01), Bidwell et al.
patent: 3568672 (1971-03-01), Cupp
patent: 3683913 (1972-08-01), Kurtz et al.
patent: 3782497 (1974-01-01), Bidwell et al.
patent: 3783870 (1974-01-01), Schachet

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