The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2007
Filed:
Feb. 08, 2006
Hidekazu Nakamoto, Kudamatsu, JP;
Seijiro Todori, Hikari, JP;
Takeshi Kawasaki, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
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 layeris formed on one surface of a lightweight alloy structureof double skin construction by using a vacuum insulating panelas a middle member and sandwiching two surfaces of the panel with elastic sound absorbing materialsmade of a nonwoven fabric or a foamed body, and the heat insulating acoustical layer is covered with an interior materialOwing 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.