Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1984-02-13
1985-07-09
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181239, F01N 716
Patent
active
045276595
ABSTRACT:
A muffler assembly having a thermally-responsive valve mechanism is disclosed which facilitates draining of moisture from within the muffler assembly without compromise of its sound-attenuating characteristics. The muffler includes an outer muffler body which defines a water drainhole disposed at a relatively low portion of the muffler where water would otherwise collect. The valve mechanism comprises a valve member affixed to the muffler body in overlapping relation relative to the water drainhole. Notably, the valve member comprises material having a coefficient of linear thermal expansion which differs from that of the material from which the muffler body is formed, thus permitting the valve member to close and open the drainhole attendant to thermal expansion and contraction of the muffler body, respectively.
REFERENCES:
patent: 2818131 (1957-12-01), Doughty
patent: 3783590 (1974-01-01), Allen
patent: 3923122 (1975-12-01), Itria
Fuller Benjamin R.
J. I. Case Company
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