Muffler for booster

Details Muffler for booster Muffler for booster

1995-02-27

1996-07-09

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

91376R, F01N 302

Patent

active

055346707

ABSTRACT:
A muffler for booster, as may be used in a brake of an automobile or the like, is provided for reducing the generation of sounds during the suction stroke when a pressure fluid is introduced into a variable pressure chamber. An uneven surface is defined on the internal surface of a tubular portion of a shell in a region which is located opposite to an opening of a variable pressure passage when the booster is inoperative. With this construction, as the atmosphere is introduced into the variable pressure chamber through the opening of the variable pressure passage, the impingement of the atmosphere against the uneven surface is effective to reduce the generation of sounds during the suction stroke. This occurs without using any sound absorbing material, and hence does not degrade the response of the booster.

REFERENCES:
patent: 4716814 (1988-01-01), Yamakoshi
patent: 5433135 (1995-07-01), Watanabe

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