Acoustics – Sound-modifying means – Sound absorbing panels
Reexamination Certificate
2007-07-31
2007-07-31
Martin, Edgardo San (Department: 2837)
Acoustics
Sound-modifying means
Sound absorbing panels
C181S295000, C105S452000, C296S039300
Reexamination Certificate
active
11349085
ABSTRACT:
To obtain a wide passenger compartment space, the thickness of a heat insulating acoustical layer is reduced, and for this purpose, a comfortable in-car environment is obtained by using a vacuum insulating panel which combines high heat insulating performance and sound insulating performance. A heat insulating acoustical layer20is formed on one surface of a lightweight alloy structure10of double skin construction by using a vacuum insulating panel21as a middle member and sandwiching two surfaces of the panel with elastic sound absorbing materials22, 23made of a nonwoven fabric or a foamed body, and the heat insulating acoustical layer is covered with an interior material24.Owing to this construction, the transmission loss of a noise which transmits from the double skin structure side is improved by the mutual actions of the elasticity of the sound absorbing material and the rigidity of the vacuum heat insulating panel.
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Patent Abstracts of Japan, vol. 1998, No. 14, JP 10 258736, Sep. 29, 1998.
“Vehicular Technology” Sep. 2001, No. 222, pp. 22-31.
Kawasaki Takeshi
Nakamoto Hidekazu
Todori Seijiro
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Martin Edgardo San
LandOfFree
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