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US 5,792,247 AGranted
Integrated resonator and filter apparatus
AssigneeDonaldson Company, Inc.
InventorsGary R. Gillingham, Daniel T. Risch, Joseph C. Tokar, Wayne M. Wagner, Bernard A. Matthys, Edward A. Steinbrueck
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Abstract
In integral filter and resonator apparatus includes filter elements positioned upstream of a Helmholtz resonator. The first embodiment includes filter elements positioned side by side within the housing. Other embodiments include a filter element with a tube which curves slightly downstream from the element. Another embodiment includes coupled chambers for attenuating the noise.
Claims4
An in-line resonator and filter apparatus comprising:
- (a) a housing having an upstream inlet and a downstream outlet;
- (b) a fluted filter element positioned within said housing;
- said filter element including an upstream side and a downstream side;
- said upstream side being aligned in-line with said inlet;
- (c) a resonating chamber positioned within said housing;
- said resonating chamber comprising a Helmholtz resonator;
- said resonating chamber being:
- (i) downstream of said filter element;
- (ii) aligned in-line with said outlet and said downstream side of said filter element;
- and
- (iii) integral with said filter element;
- and
- (d) a tube construction within the resonating chamber;
- said tube construction extending between said downstream side of said filter element and said housing outlet.
11 more elements
Dependencies are inferred from the claim text.