Patent ID: 6089650
Filing Date: 2000-07-18
Classification: B62D,F01C,F04B,F16M

Abstract:
A sound attenuating enclosure for a portable machine comprising:a lower body having a lower body coefficient of thermal expansion, the lower body including an inner skin and an outer skin spaced apart from said inner skin, said lower body being adapted for having said portable machine mounted therein, said lower body having one or more wheels rotatably mounted thereto;an upper body having an upper body coefficient of thermal expansion, the upper body overlying said lower body for containing said portable machine between said upper and lower bodies, wherein said upper body has a different coefficient of thermal expansion than said lower body; anda towing element attached to said lower body for pulling said enclosure over a surface, wherein said towing element includes a tow bar connected to the lower body and projecting from a front end thereof and the tow bar is adjustable for modifying the height of the front end of the lower body above said surface;wherein one or more sections of said inner and outer skins are in permanent contact with one another for damping vibrational movement of said skins during operation of said machine so as to reduce the level of sound emanating from said enclosure.