초록 ▼

The present invention provides for noise reduction during operation of a portable blower by reducing the noise or acoustic energy escaping from the housing outlet and blower tube. The noise reduction is achieved by placing sound absorbing material in the blower tube. The sound absorbing material may

The present invention provides for noise reduction during operation of a portable blower by reducing the noise or acoustic energy escaping from the housing outlet and blower tube. The noise reduction is achieved by placing sound absorbing material in the blower tube. The sound absorbing material may include flared upstream and downstream ends to reduce turbulence. The sound absorbing material may be held within the blower tube by an insert frame such that substantial portions of the sound absorbing material are exposed to air passing through the blower tube. Also disclosed is a sound absorbing insert that can be placed within an existing blower tube to retrofit portable blowers with noise reduction technology.

대표청구항 ▼

[ What is claimed is:] [1.]1. A portable blower comprising:a blower tube attached to a housing outlet on the portable blower;a sound absorbing insert sized to fit within the blower tube, the sound absorbing insert comprising:sound absorbing material comprising an inner surface located about a main p

[ What is claimed is:] [1.]1. A portable blower comprising:a blower tube attached to a housing outlet on the portable blower;a sound absorbing insert sized to fit within the blower tube, the sound absorbing insert comprising:sound absorbing material comprising an inner surface located about a main passageway for air passing through the sound absorbing insert;a flared upstream end; anda flared downstream end.