Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2008-03-13
2010-10-05
Donels, Jeffrey (Department: 2832)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S252000, C181S272000, C181S256000
Reexamination Certificate
active
07806228
ABSTRACT:
An apparatus and method for attenuating the sound generated by a single duct terminal unit in an HVAC (heating, ventilating, and air conditioning) system. The apparatus utilizes internal geometry to minimize noise due to air disturbances and aerodynamic effects within the apparatus.
REFERENCES:
patent: 2808896 (1957-10-01), Sigismond
patent: 3033307 (1962-05-01), Sanders et al.
patent: 3511336 (1970-05-01), Rink et al.
patent: 4287962 (1981-09-01), Ingard et al.
patent: 5663535 (1997-09-01), MacDonlad
patent: 5728979 (1998-03-01), Yazici et al.
patent: 5869792 (1999-02-01), Allen et al.
Dimensions of Tested Prior Art Units—DIR-B, DIR-D.
Dimensions of Tested Prior Art Units—3′-B, 3′-D.
Dimensions of Tested Prior Art Units—TR-B, TR-D.
Baetsen Johann Joel Emile
Dyck Alfred Theodor
Gryc Bogna
McLennan Duane
Patterson James William
Donels Jeffrey
E.H. Price Ltd.
Phillips Forrest M
Smith Gambrell & Russell
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