초록 ▼

A sound attenuator comprising concentric inner and outer tubular members having sound absorbing material positioned therebetween. The inner tubular member comprises a lattice of reinforcing strand material coated with solidified resin wherein the strand material is formed in opposed generally helica

A sound attenuator comprising concentric inner and outer tubular members having sound absorbing material positioned therebetween. The inner tubular member comprises a lattice of reinforcing strand material coated with solidified resin wherein the strand material is formed in opposed generally helical patterns to provide the lattice. The attenuator is suitable for use in reducing noise produced by axial flow fans used in industrial environs such as mines and factories.

대표청구항 ▼

A sound attenuator comprising: a tubular inner member having an interior and comprising a lattice of reinforcing strand material coated with solidified resin, said strand material being formed in two opposed generally helical patterns that intersect at a plurality of points, said strand material of

A sound attenuator comprising: a tubular inner member having an interior and comprising a lattice of reinforcing strand material coated with solidified resin, said strand material being formed in two opposed generally helical patterns that intersect at a plurality of points, said strand material of one said helical pattern being intimately bonded by said solidified resin to said strand material of said other generally helical pattern at substantially each said point of intersection, said lattice having a plurality of open areas between said strand material; a tubular outer member having a diameter greater than the diameter of said tubular inner member; means for retaining said tubular members in concentric relationship to provide a space therebetween; and sound absorbing material positioned in said space, said sound absorbing material being in communication with said interior of said tubular inner member through said open areas to provide for sound attenuation.